[ { "part": "M11.13 ATA 32", "ch": "Why is the tail skid considered obsolete for tail wheel type landing gear?", "ansGr": [ { "ans": [ "Hard surface runways have made the tail wheel more effective for directional control.", "true" ] }, { "ans": [ "The tail skid is heavier and less efficient than modern alternatives.", "false" ] }, { "ans": [ "The tail skid cannot provide sufficient braking power.", "false" ] } ] }, { "ch": "Which of the following is a characteristic of tandem landing gear?", "ansGr": [ { "ans": [ "It aligns the main and tail gear along the longitudinal axis of the aircraft.", "true" ] }, { "ans": [ "It has the main gear located at the forward section of the aircraft.", "false" ] }, { "ans": [ "It allows for a higher clearance for non-paved runways.", "false" ] } ] }, { "ch": "What is the advantage of the nose gear in a tricycle landing gear arrangement?", "ansGr": [ { "ans": [ "It provides better visibility from the flight deck during landing and ground maneuvering.", "true" ] }, { "ans": [ "It helps in keeping the aircraft’s nose elevated during takeoff.", "false" ] }, { "ans": [ "It reduces the weight of the aircraft, making it easier to handle.", "false" ] } ] }, { "ch": "How is the nose gear of a light aircraft typically controlled?", "ansGr": [ { "ans": [ "Through mechanical linkage to the rudder pedals.", "true" ] }, { "ans": [ "By using differential braking alone.", "false" ] }, { "ans": [ "Via hydraulic power from an independent tiller.", "false" ] } ] }, { "ch": "What is the primary use of Type III aircraft tires?", "ansGr": [ { "ans": [ "They are used on light aircraft with landing speeds of 160 mph or less.", "true" ] }, { "ans": [ "They are used on high-performance jet aircraft only.", "false" ] }, { "ans": [ "They are used exclusively on older aircraft.", "false" ] } ] }, { "ch": "What effect does taxiing at high speeds have on aircraft tires?", "ansGr": [ { "ans": [ "It increases the temperature, making them more susceptible to wear and damage.", "true" ] }, { "ans": [ "It decreases the tire's lifespan significantly.", "false" ] }, { "ans": [ "It has no effect on the tires at all.", "false" ] } ] }, { "ch": "Which component of an aircraft tire helps maintain air pressure and contributes to performance?", "ansGr": [ { "ans": [ "The inner liner.", "true" ] }, { "ans": [ "The tread pattern.", "false" ] }, { "ans": [ "The sidewall reinforcement.", "false" ] } ] }, { "ch": "How can the use of heavy braking during takeoff affect aircraft tires?", "ansGr": [ { "ans": [ "It can cause overheating and potential tire failure.", "true" ] }, { "ans": [ "It improves the performance of the tires.", "false" ] }, { "ans": [ "It has no impact on tire condition.", "false" ] } ] }, { "ch": "What role does proper maintenance of airport surfaces play in tire longevity?", "ansGr": [ { "ans": [ "It reduces the risk of tire damage from foreign objects and rough surfaces.", "true" ] }, { "ans": [ "It has no relevance to tire health.", "false" ] }, { "ans": [ "It solely benefits the aircraft engines.", "false" ] } ] }, { "ch": "Which of the following practices can help prevent excessive tire wear during ground operations?", "ansGr": [ { "ans": [ "Making large radius turns instead of sharp turns.", "true" ] }, { "ans": [ "Using brakes continuously while taxiing.", "false" ] }, { "ans": [ "Stopping frequently to check tire condition.", "false" ] } ] }, { "ch": "How does the conventional gear arrangement benefit aircraft operating on non-paved runways?", "ansGr": [ { "ans": [ "It provides increased clearance for the forward fuselage, reducing the risk of damage.", "true" ] }, { "ans": [ "It minimizes the weight, making the aircraft easier to handle on rough terrain.", "false" ] }, { "ans": [ "It allows for faster takeoff speeds due to reduced drag.", "false" ] } ] }, { "ch": "Why might aircraft manufacturers still use conventional gear despite the development of newer landing gear types?", "ansGr": [ { "ans": [ "The weight savings from the relatively light tail wheel assembly is advantageous.", "true" ] }, { "ans": [ "It provides superior ground stability compared to other types.", "false" ] }, { "ans": [ "The conventional gear is more economical to produce.", "false" ] } ] }, { "ch": "Which aspect of tandem landing gear allows the use of very flexible wings on some aircraft, such as the Harrier?", "ansGr": [ { "ans": [ "The gear placement under the fuselage facilitates wing flexibility.", "true" ] }, { "ans": [ "The smaller size of tandem gear allows for increased wing movement.", "false" ] }, { "ans": [ "The inclusion of outrigger gear provides extra support for flexible wings.", "false" ] } ] }, { "ch": "What is the primary function of shock absorber in landing gear systems?", "ansGr": [ { "ans": [ "To convert impact energy into heat energy, dispersing it to protect the aircraft structure.", "true" ] }, { "ans": [ "To increase the speed of landing and takeoff by minimizing drag.", "false" ] }, { "ans": [ "To distribute the aircraft’s weight evenly over the landing surface.", "false" ] } ] }, { "ch": "How does the metering pin in a shock strut affect fluid flow during compression?", "ansGr": [ { "ans": [ "The pin’s taper adjusts the flow rate, allowing controlled compression and heat dissipation.", "true" ] }, { "ans": [ "The pin blocks fluid flow, causing the strut to remain compressed for longer durations.", "false" ] }, { "ans": [ "The pin provides a constant flow rate regardless of the compression level.", "false" ] } ] }, { "ch": "Why is a recoil valve necessary in shock strut operation?", "ansGr": [ { "ans": [ "It controls fluid flow during extension, preventing damage from rapid rebound.", "true" ] }, { "ans": [ "It seals the strut, preventing any fluid leakage during landing.", "false" ] }, { "ans": [ "It reduces the heat generated during compression by controlling airflow.", "false" ] } ] }, { "ch": "What role do torque links play in shock struts?", "ansGr": [ { "ans": [ "They prevent the piston from rotating, ensuring wheel alignment and stability.", "true" ] }, { "ans": [ "They control the fluid flow rate during compression and extension.", "false" ] }, { "ans": [ "They serve as snubbing devices, absorbing shock during rough landings.", "false" ] } ] }, { "ch": "How does the nose gear locating cam assembly aid during landing gear retraction?", "ansGr": [ { "ans": [ "It ensures the wheel aligns with the longitudinal axis of the aircraft for smooth retraction.", "true" ] }, { "ans": [ "It controls the extension rate of the nose wheel to minimize impact.", "false" ] }, { "ans": [ "It prevents the wheels from oscillating during high-speed taxi operations.", "false" ] } ] }, { "ch": "Why is it important to follow proper deflating techniques when servicing a shock strut?", "ansGr": [ { "ans": [ "High-pressure air can propel parts, leading to injury if not handled correctly.", "true" ] }, { "ans": [ "Incorrect deflation may lead to fluid leakage, causing strut malfunction.", "false" ] }, { "ans": [ "Deflating improperly can cause the strut to overheat and fail during landing.", "false" ] } ] }, { "ch": "What is a critical step in bleeding a shock strut to ensure proper operation?", "ansGr": [ { "ans": [ "Compressing and extending the strut multiple times to remove trapped air bubbles.", "true" ] }, { "ans": [ "Releasing hydraulic fluid at the service valve port to maintain fluid levels.", "false" ] }, { "ans": [ "Installing a new metering pin to regulate fluid flow during the process.", "false" ] } ] }, { "ch": "How do Type VII tires differ from Type III tires in terms of pressure and load capability?", "ansGr": [ { "ans": [ "Type VII tires are inflated to high pressure and have exceptional load carrying capability.", "true" ] }, { "ans": [ "Type VII tires are lower pressure and designed for lightweight aircraft.", "false" ] }, { "ans": [ "Type VII tires have the same pressure and load capacity as Type III tires.", "false" ] } ] }, { "ch": "In what situation would a tire with the letter \"B\" before its identifier be used?", "ansGr": [ { "ans": [ "When the tire has a wheel rim to section width ratio of 60 to 70 percent with a bead taper of 15 degrees.", "true" ] }, { "ans": [ "When the tire is designed for low-speed landings only.", "false" ] }, { "ans": [ "When the tire has no bead taper at all.", "false" ] } ] }, { "ch": "What is the role of the bead in an aircraft tire?", "ansGr": [ { "ans": [ "It anchors the tire carcass and provides a firm mounting surface on the wheel rim.", "true" ] }, { "ans": [ "It cushions the tire during landing.", "false" ] }, { "ans": [ "It adds color to the tire design.", "false" ] } ] }, { "ch": "How does the construction of bias ply tires differ from radial tires?", "ansGr": [ { "ans": [ "Bias ply tires have plies wrapped at an angle, while radial tires have plies laid at a 90-degree angle to the direction of rotation.", "true" ] }, { "ans": [ "Bias ply tires have no plies, while radial tires have multiple plies.", "false" ] }, { "ans": [ "Bias ply tires are always used on jets, while radial tires are used on smaller aircraft.", "false" ] } ] }, { "ch": "What potential issue arises from gas trapped in the plies of a tire?", "ansGr": [ { "ans": [ "It could expand with temperature changes and cause separation of the plies, leading to tire failure.", "true" ] }, { "ans": [ "It improves the tire’s performance under load.", "false" ] }, { "ans": [ "It prevents air from seeping out of the tire.", "false" ] } ] }, { "ch": "How can under-inflated aircraft tires lead to structural damage during landing?", "ansGr": [ { "ans": [ "They can flex beyond design limits, causing excessive heat build-up", "true" ] }, { "ans": [ "They improve the tire's performance on the runway", "false" ] }, { "ans": [ "They have no impact on the structural integrity of the tire", "false" ] } ] }, { "ch": "What should maintenance personnel consider when adjusting tire pressure after a flight in different temperature environments?", "ansGr": [ { "ans": [ "The tire pressure should be the same regardless of temperature changes", "true" ] }, { "ans": [ "They should increase tire pressure to account for cooler temperatures upon landing", "false" ] }, { "ans": [ "Tire pressure does not need to be adjusted when flying to different climates", "false" ] } ] }, { "ch": "How can asymmetrical tread wear affect aircraft safety, and what should be done if detected?", "ansGr": [ { "ans": [ "It indicates normal operation; no action is needed", "true" ] }, { "ans": [ "It may suggest alignment issues and should be investigated and corrected", "false" ] }, { "ans": [ "It is only a cosmetic issue and does not require attention", "false" ] } ] }, { "ch": "Why is it important to allow time for tires to cool before checking their pressure after landing?", "ansGr": [ { "ans": [ "To ensure accurate readings since pressure changes with temperature", "true" ] }, { "ans": [ "It is unnecessary, as tire pressure does not fluctuate", "false" ] }, { "ans": [ "It helps to increase the tire's lifespan", "false" ] } ] }, { "ch": "What immediate action should be taken if a bulge or separation is observed in a tire's tread?", "ansGr": [ { "ans": [ "The tire should be marked for later inspection", "true" ] }, { "ans": [ "The tire must be removed from service immediately", "false" ] }, { "ans": [ "The tire can remain in service if the bulge is small", "false" ] } ] }, { "ch": "How does contamination from oil or hydraulic fluid affect aircraft tires, and what should be done?", "ansGr": [ { "ans": [ "It enhances tire performance and should be left untreated", "true" ] }, { "ans": [ "It softens the tire rubber, requiring immediate removal from service", "false" ] }, { "ans": [ "It has no effect on the tire and can be ignored", "false" ] } ] }, { "ch": "How should a technician approach a tire that has been identified as damaged and possibly explosive due to overheating?", "ansGr": [ { "ans": [ "Approach from the side while it is still warm", "true" ] }, { "ans": [ "Stand clear and approach only once cooled, from an oblique angle", "false" ] }, { "ans": [ "Remove it immediately from the aircraft without caution", "false" ] } ] }, { "ch": "What are the consequences of using a hydrocarbon-based lubricant on aircraft tires during the removal process?", "ansGr": [ { "ans": [ "It enhances the tire's flexibility and should be applied liberally", "true" ] }, { "ans": [ "It contaminates the rubber compound, leading to potential failure", "false" ] }, { "ans": [ "It has no effect and can be used without concern", "false" ] } ] }, { "ch": "Why is it critical to inspect the bead area of a tire during an inspection off the aircraft?", "ansGr": [ { "ans": [ "The bead area provides an airtight seal and bears significant operational forces", "true" ] }, { "ans": [ "The bead area is less important than the tread surface", "false" ] }, { "ans": [ "Damage in the bead area is always repairable without concern", "false" ] } ] }, { "ch": "What steps should be taken if a tire has been involved in an aborted takeoff?", "ansGr": [ { "ans": [ "Inspect it for visible damage only", "true" ] }, { "ans": [ "It must be removed and evaluated for potential internal damage", "false" ] }, { "ans": [ "It can remain on the aircraft if it appears undamaged", "false" ] } ] }, { "ch": "What factors should be considered when determining whether a tire is suitable for retreading?", "ansGr": [ { "ans": [ "The tire's appearance and age alone", "true" ] }, { "ans": [ "The internal integrity assessed through professional inspection methods", "false" ] }, { "ans": [ "Whether the tread surface is still intact without regard for the inner structure", "false" ] } ] }, { "ch": "Why is it important to inspect the inside of a tube type tire before installing a tube?", "ansGr": [ { "ans": [ "To check for protrusions that could abrade the tube", "true" ] }, { "ans": [ "To ensure the tire is the correct size", "false" ] }, { "ans": [ "To confirm the valve is working properly", "false" ] } ] }, { "ch": "What is the recommended procedure for inflating an aircraft tire and tube assembly?", "ansGr": [ { "ans": [ "Inflate, deflate, then re-inflate to specified pressure", "true" ] }, { "ans": [ "Inflate to full pressure and leave it", "false" ] }, { "ans": [ "Inflate and immediately put the tire under load", "false" ] } ] }, { "ch": "What role does tire balancing play in aircraft performance?", "ansGr": [ { "ans": [ "It prevents vibration and improves tire longevity", "true" ] }, { "ans": [ "It increases tire pressure", "false" ] }, { "ans": [ "It changes the tire's size", "false" ] } ] }, { "ch": "Explain how excessive heat from braking can affect aircraft tire performance.", "ansGr": [ { "ans": [ "Excessive heat can lead to tread abrasion and potential tire failure.", "true" ] }, { "ans": [ "Excessive heat improves tire flexibility and performance.", "false" ] }, { "ans": [ "Excessive heat has no impact on tire performance.", "false" ] } ] }, { "ch": "What actions can be taken to minimize tire damage when taxiing an aircraft?", "ansGr": [ { "ans": [ "Avoiding taxiing at high speeds and riding the brakes.", "true" ] }, { "ans": [ "Accelerating quickly to reduce taxi time.", "false" ] }, { "ans": [ "Only using brakes when necessary.", "false" ] } ] }, { "ch": "Identify a common cause of tire failure during takeoff.", "ansGr": [ { "ans": [ "Running over foreign objects on the runway.", "true" ] }, { "ans": [ "Flying at a higher altitude.", "false" ] }, { "ans": [ "Maintaining proper tire pressure.", "false" ] } ] }, { "ch": "What is the significance of maintaining clean ramp areas and hangar floors?", "ansGr": [ { "ans": [ "It helps prevent tire damage from foreign objects.", "true" ] }, { "ans": [ "It is not necessary as tires are resilient.", "false" ] }, { "ans": [ "It has no effect on tire performance.", "false" ] } ] }, { "ch": "Discuss the relationship between hydroplaning and tire wear.", "ansGr": [ { "ans": [ "Hydroplaning can lead to increased heat and rapid tire wear.", "true" ] }, { "ans": [ "Hydroplaning improves tire durability.", "false" ] }, { "ans": [ "Hydroplaning has no impact on tire wear.", "false" ] } ] }, { "ch": "What would likely happen if sequence valves C and D fail to open after gear retraction?", "ansGr": [ { "ans": [ "The gear doors will remain open, and the doors will not close after retraction", "true" ] }, { "ans": [ "The gear actuators will lock hydraulically", "false" ] }, { "ans": [ "The landing gear doors will remain open, increasing drag", "false" ] } ] }, { "ch": "If the restrictors in the orifice check valves on the up-side of the main gear actuators become blocked, what is the most likely result during gear extension?", "ansGr": [ { "ans": [ "Gear drops too quickly, possibly causing structural impact", "true" ] }, { "ans": [ "Gear fails to lock due to insufficient pressure", "false" ] }, { "ans": [ "Gear extends too slowly, causing timing delay", "false" ] } ] }, { "ch": "What is the primary difference between a sequence valve and a priority valve in a landing gear system?", "ansGr": [ { "ans": [ "Sequence valves depend on mechanical actuation; priority valves rely on pressure thresholds", "true" ] }, { "ans": [ "Sequence valves are used in nose gear only; priority valves are only in main gear", "false" ] }, { "ans": [ "Sequence valves regulate flow; priority valves isolate fuel supply", "false" ] } ] }, { "ch": "Why do sequence valves A and B block fluid flow to the main gear actuators at the beginning of gear extension?", "ansGr": [ { "ans": [ "To ensure main gear does not extend before doors are fully open", "true" ] }, { "ans": [ "To prevent fluid bypass and loss of pressure in the door actuators", "false" ] }, { "ans": [ "To synchronize nose and main gear lowering at the same rate", "false" ] } ] }, { "ch": "In an aircraft with a mechanical emergency extension handle, what would be the likely result if the linkage to the uplocks is jammed?", "ansGr": [ { "ans": [ "The gear would remain retracted despite pulling the handle", "true" ] }, { "ans": [ "The doors would open, but the gear would still extend", "false" ] }, { "ans": [ "The gear would extend hydraulically", "false" ] } ] }, { "ch": "Which of the following best explains why some aircraft use pneumatic power for emergency gear extension?", "ansGr": [ { "ans": [ "To provide redundancy when mechanical linkage is not feasible", "true" ] }, { "ans": [ "To assist flap operation during low-speed flight", "false" ] }, { "ans": [ "To ensure controlled, slow movement of gear doors", "false" ] } ] }, { "ch": "Why is emergency gear extension less common in large, high-performance aircraft?", "ansGr": [ { "ans": [ "Because these aircraft are equipped with multiple hydraulic systems", "true" ] }, { "ans": [ "Because electrical systems provide sufficient backup", "false" ] }, { "ans": [ "Because gear doors are always open in flight", "false" ] } ] }, { "ch": "If a technician is troubleshooting a failure of emergency gear extension and finds that gravity extension does not occur, what should be checked first?", "ansGr": [ { "ans": [ "Free movement of the uplock release mechanism", "true" ] }, { "ans": [ "Function of the normal gear selector switch", "false" ] }, { "ans": [ "Tire pressure in the main gear", "false" ] } ] }, { "ch": "Why is it important to perform a landing gear retraction test after a hard or overweight landing?", "ansGr": [ { "ans": [ "To detect possible damage to gear components or alignment issues", "true" ] }, { "ans": [ "To check tire inflation pressures", "false" ] }, { "ans": [ "To reset weight-on-wheel sensors", "false" ] } ] }, { "ch": "During a retraction test, unusual rubbing noise is heard near the gear door area. What should the technician do?", "ansGr": [ { "ans": [ "Check for binding, misalignment, or interference in door linkage", "true" ] }, { "ans": [ "Apply lubrication to the main actuator cylinder", "false" ] }, { "ans": [ "Ignore the noise if the gear extends properly", "false" ] } ] }, { "ch": "What is the tail wheel type landing gear also known as?", "ansGr": [ { "ans": [ "Conventional gear", "true" ] }, { "ans": [ "Tricycle gear", "false" ] }, { "ans": [ "Tandem gear", "false" ] } ] }, { "ch": "Which type of landing gear is most commonly used in aircraft?", "ansGr": [ { "ans": [ "Tricycle type landing gear.", "true" ] }, { "ans": [ "Tail wheel type landing gear", "false" ] }, { "ans": [ "Tandem landing gear", "false" ] } ] }, { "ch": "What is the primary power source for extension and retraction systems in large aircraft?", "ansGr": [ { "ans": [ "Hydraulics.", "true" ] }, { "ans": [ "Electric motors.", "false" ] }, { "ans": [ "Pneumatic systems.", "false" ] } ] }, { "ch": "Where can specific details about any aircraft’s hydraulic landing gear system be found?", "ansGr": [ { "ans": [ "In the aircraft maintenance manual.", "true" ] }, { "ans": [ "In the flight operations manual.", "false" ] }, { "ans": [ "In the pilot’s logbook.", "false" ] } ] }, { "ch": "What is the purpose of the emergency extension system?", "ansGr": [ { "ans": [ "To lower the landing gear if the main power system fails.", "true" ] }, { "ans": [ "To raise the landing gear during flight.", "false" ] }, { "ans": [ "To operate the aircraft’s main hydraulic system.", "false" ] } ] }, { "ch": "What should you consult for information on emergency landing gear extension system tests?", "ansGr": [ { "ans": [ "The aircraft maintenance manual.", "true" ] }, { "ans": [ "The aircraft flight manual.", "false" ] }, { "ans": [ "The aircraft operations manual.", "false" ] } ] }, { "ch": "What is the purpose of a nose wheel centering device on an aircraft?", "ansGr": [ { "ans": [ "To align the nose gear with the wheel well bay before retraction", "true" ] }, { "ans": [ "To assist in landing the aircraft", "false" ] }, { "ans": [ "To provide information on the speed of the aircraft", "false" ] } ] }, { "ch": "What is the function of centering cams in the shock strut structure of an aircraft?", "ansGr": [ { "ans": [ "They align the nose gear before retraction", "true" ] }, { "ans": [ "They provide information about the aircraft’s altitude", "false" ] }, { "ans": [ "They control the speed of the aircraft", "false" ] } ] }, { "ch": "What is the function of proximity sensors in aircraft landing gear systems?", "ansGr": [ { "ans": [ "They detect the position of the landing gear without physical contact", "true" ] }, { "ans": [ "They monitor the temperature of the aircraft’s wheels", "false" ] }, { "ans": [ "They control the speed of the aircraft during takeoff", "false" ] } ] }, { "ch": "What is the purpose of the nose wheel steering system in modern aircraft?", "ansGr": [ { "ans": [ "To allow the aircraft to be directed during ground operation.", "true" ] }, { "ans": [ "To monitor the aircraft altitude.", "false" ] }, { "ans": [ "To control cabin temperature.", "false" ] } ] }, { "ch": "What is the primary purpose of a shimmy damper in an aircraft's nose gear?", "ansGr": [ { "ans": [ "To control the tendency of the nose gear to oscillate rapidly at certain speeds.", "true" ] }, { "ans": [ "To assist in landing gear retraction.", "false" ] }, { "ans": [ "To provide additional support to the aircraft’s structure.", "false" ] } ] }, { "ch": "What is the primary purpose of regular maintenance on the landing gear system?", "ansGr": [ { "ans": [ "To ensure the proper operation and safety of the landing gear.", "true" ] }, { "ans": [ "To improve the aircraft's fuel efficiency.", "false" ] }, { "ans": [ "To enhance the aircraft's aerodynamics.", "false" ] } ] }, { "ch": "Why is it important to maintain specific clearances between landing gear doors and the aircraft structure?", "ansGr": [ { "ans": [ "To prevent structural damage and wear during flight.", "true" ] }, { "ans": [ "To enhance the visual appeal of the aircraft.", "false" ] }, { "ans": [ "To improve fuel efficiency.", "false" ] } ] }, { "ch": "What materials are typically used to construct modern aircraft wheels?", "ansGr": [ { "ans": [ "Aluminum or magnesium alloy.", "true" ] }, { "ans": [ "Steel or plastic.", "false" ] }, { "ans": [ "Titanium or carbon fiber.", "false" ] } ] }, { "ch": "What should be inspected for signs of suspected damage during an on-aircraft inspection of wheel assemblies?", "ansGr": [ { "ans": [ "The general condition of the aircraft wheel assemblies.", "true" ] }, { "ans": [ "Only the brake components.", "false" ] }, { "ans": [ "The engine components.", "false" ] } ] }, { "ch": "Why should a technician deflate the tire before removing the wheel assembly from an aircraft?", "ansGr": [ { "ans": [ "To prevent a potential explosion due to high internal pressure.", "true" ] }, { "ans": [ "To clean the tire more efficiently.", "false" ] }, { "ans": [ "To make it easier to remove the wheel hub.", "false" ] } ] }, { "ch": "What should be done before removing the wheel assembly from the aircraft?", "ansGr": [ { "ans": [ "Deflate the tire to prevent explosion when removing the axle nut.", "true" ] }, { "ans": [ "Remove the wheel assembly with air pressure in the tire.", "false" ] }, { "ans": [ "Use an impact tool to remove the wheel tie bolts.", "false" ] } ] }, { "ch": "Which tool should not be used to pry a tire off the wheel rim?", "ansGr": [ { "ans": [ "A screwdriver or other sharp device.", "true" ] }, { "ans": [ "A hydraulic press.", "false" ] }, { "ans": [ "A magnifying glass.", "false" ] } ] }, { "ch": "What should never be done when drying a wheel bearing with compressed air?", "ansGr": [ { "ans": [ "Rotating the bearing, as it may cause damage.", "true" ] }, { "ans": [ "Using a soft brush to clean the bearing.", "false" ] }, { "ans": [ "Removing the bearing cup during drying.", "false" ] } ] }, { "ch": "Which solvent is recommended for cleaning wheel bearings?", "ansGr": [ { "ans": [ "Varsol, naptha, or Stoddard™ solvent.", "true" ] }, { "ans": [ "Gasoline or jet fuel.", "false" ] }, { "ans": [ "Water and soap.", "false" ] } ] }, { "ch": "What is the primary function of disc brakes in modern aircraft?", "ansGr": [ { "ans": [ "To create friction that slows down the aircraft wheels.", "true" ] }, { "ans": [ "To enhance the aerodynamic performance of the aircraft.", "false" ] }, { "ans": [ "To provide electrical power to various systems.", "false" ] } ] }, { "ch": "Which component in a single disc brake applies pressure to the brake pads?", "ansGr": [ { "ans": [ "The hydraulic master cylinder.", "true" ] }, { "ans": [ "The wheel assembly.", "false" ] }, { "ans": [ "The brake disc.", "false" ] } ] }, { "ch": "What is the primary function of the brake actuating systems in aircraft?", "ansGr": [ { "ans": [ "To deliver hydraulic fluid pressure to brake assemblies.", "true" ] }, { "ans": [ "To generate electrical power for braking systems.", "false" ] }, { "ans": [ "To control the aircraft's flight path.", "false" ] } ] }, { "ch": "Which type of braking system does not connect to the aircraft's main hydraulic system?", "ansGr": [ { "ans": [ "An independent brake system.", "true" ] }, { "ans": [ "A boosted brake system.", "false" ] }, { "ans": [ "A power brake system.", "false" ] } ] }, { "ch": "What is the primary function of the anti-skid system in large aircraft with power brakes?", "ansGr": [ { "ans": [ "Detect and prevent wheel skidding.", "true" ] }, { "ans": [ "Monitor tire pressure.", "false" ] }, { "ans": [ "Control the hydraulic fluid levels.", "false" ] } ] }, { "ch": "Which component in the anti-skid system detects the speed of each wheel?", "ansGr": [ { "ans": [ "Wheel speed sensors.", "true" ] }, { "ans": [ "Control unit.", "false" ] }, { "ans": [ "Anti-skid control valve.", "false" ] } ] }, { "ch": "Where are anti-skid control valves typically located in an aircraft?", "ansGr": [ { "ans": [ "Near the main wheel assemblies.", "true" ] }, { "ans": [ "Inside the flight deck.", "false" ] }, { "ans": [ "Next to the engine compartment.", "false" ] } ] }, { "ch": "What is the purpose of brake inspection and service for aircraft?", "ansGr": [ { "ans": [ "To keep the brake components fully functional at all times.", "true" ] }, { "ans": [ "To enhance the visual appearance of the aircraft.", "false" ] }, { "ans": [ "To reduce the weight of the brake system components.", "false" ] } ] }, { "ch": "What should be monitored to ensure brake linings are effective?", "ansGr": [ { "ans": [ "The amount of wear.", "true" ] }, { "ans": [ "The color of the brake lining.", "false" ] }, { "ans": [ "The temperature of the brakes.", "false" ] } ] }, { "ch": "Which two methods are used to bleed air from brake systems?", "ansGr": [ { "ans": [ "Gravity bleeding and pressure bleeding.", "true" ] }, { "ans": [ "Manual cleaning and automated cleaning.", "false" ] }, { "ans": [ "Hydraulic draining and air pumping.", "false" ] } ] }, { "ch": "What is the purpose of inspecting bolts and threaded connections during brake maintenance?", "ansGr": [ { "ans": [ "To ensure they are in good condition and meet the manufacturer’s specifications.", "true" ] }, { "ans": [ "To check if they are loose and can be removed easily.", "false" ] }, { "ans": [ "To replace them with standard hardware from any supplier.", "false" ] } ] }, { "ch": "What is a common sign of brake disc wear that should be checked during an inspection?", "ansGr": [ { "ans": [ "Uneven wear on the rotating and stationary discs.", "true" ] }, { "ans": [ "Presence of excessive lubricant on the discs.", "false" ] }, { "ans": [ "Perfectly smooth disc surfaces without any scratches.", "false" ] } ] }, { "ch": "What components are typically included in a hydraulically-operated retraction system?", "ansGr": [ { "ans": [ "Actuating cylinders, selector valves, uplocks, and sequence valves.", "true" ] }, { "ans": [ "Electric motors and battery units.", "false" ] }, { "ans": [ "Pneumatic pumps and manual levers.", "false" ] } ] }, { "ch": "What happens when the flight deck gear selector is moved to the gear-up position?", "ansGr": [ { "ans": [ "The selector valve allows pump pressure to access multiple components, unlocking downlocks and actuating the cylinders.", "true" ] }, { "ans": [ "The gear retracts immediately without any fluid pressure changes.", "false" ] }, { "ans": [ "The main gear doors close automatically before the gear retracts.", "false" ] } ] }, { "ch": "What is the function of the sequence valves in the landing gear retraction system?", "ansGr": [ { "ans": [ "They control the timing of gear door operation by delaying fluid flow.", "true" ] }, { "ans": [ "They immediately unlock the uplocks and extend the gear.", "false" ] }, { "ans": [ "They bypass the main hydraulic pump to speed up retraction.", "false" ] } ] }, { "ch": "Why is it important to use restrictors in the orifice check valves when extending the gear?", "ansGr": [ { "ans": [ "To slow down the extension and prevent impact damage.", "true" ] }, { "ans": [ "To accelerate the retraction process during flight.", "false" ] }, { "ans": [ "To block hydraulic fluid from returning to the pump.", "false" ] } ] }, { "ch": "How does the emergency extension system function in some aircraft with a release handle?", "ansGr": [ { "ans": [ "It releases the uplocks, allowing the gear to free-fall into the extended position.", "true" ] }, { "ans": [ "It uses hydraulic power to automatically lower the gear.", "false" ] }, { "ans": [ "It requires manual operation by the maintenance crew.", "false" ] } ] }, { "ch": "When should a landing gear retraction test be performed?", "ansGr": [ { "ans": [ "After replacing or adjusting any landing gear component.", "true" ] }, { "ans": [ "Only during annual inspections.", "false" ] }, { "ans": [ "When the aircraft has a new paint job.", "false" ] } ] }, { "ch": "What do ground locks do on aircraft landing gear?", "ansGr": [ { "ans": [ "They prevent the landing gear from retracting while the aircraft is on the ground", "true" ] }, { "ans": [ "They help the landing gear retract during flight", "false" ] }, { "ans": [ "They provide real-time data to the pilot about the landing gear position", "false" ] } ] }, { "ch": "Which of the following is a characteristic feature of ground locks?", "ansGr": [ { "ans": [ "They often have red streamers attached for visibility", "true" ] }, { "ans": [ "They are used to retract the gear during flight", "false" ] }, { "ans": [ "They operate automatically without manual installation", "false" ] } ] }, { "ch": "How does a landing gear squat switch function on an aircraft?", "ansGr": [ { "ans": [ "It opens or closes depending on the extension or compression of the main landing gear strut", "true" ] }, { "ans": [ "It monitors the speed of the landing gear retraction", "false" ] }, { "ans": [ "It automatically adjusts the nose wheel alignment during landing", "false" ] } ] }, { "ch": "What happens when the squat switch is open while the aircraft is on the ground?", "ansGr": [ { "ans": [ "The gear position selector is physically disabled to prevent gear retraction", "true" ] }, { "ans": [ "The landing gear automatically retracts", "false" ] }, { "ans": [ "The aircraft’s speed is adjusted to prepare for takeoff", "false" ] } ] }, { "ch": "How does an electromagnetic sensor work in a proximity sensor system?", "ansGr": [ { "ans": [ "It returns a different voltage to a gear logic unit based on the proximity of a conductive target", "true" ] }, { "ans": [ "It physically contacts the target to measure distance", "false" ] }, { "ans": [ "It calculates airspeed and adjusts the gear position accordingly", "false" ] } ] }, { "ch": "What tool is often used to set the correct distance between the sensor and the target in a proximity sensor system?", "ansGr": [ { "ans": [ "Go-No-Go gauge", "true" ] }, { "ans": [ "Electronic calibrator", "false" ] }, { "ans": [ "Gap meter", "false" ] } ] }, { "ch": "Which power source is predominantly used for nose wheel steering in large aircraft?", "ansGr": [ { "ans": [ "Hydraulic power.", "true" ] }, { "ans": [ "Electrical power.", "false" ] }, { "ans": [ "Mechanical power.", "false" ] } ] }, { "ch": "What component in the nose wheel steering system keeps fluid in the actuators under pressure to act as shimmy dampers?", "ansGr": [ { "ans": [ "An accumulator and relief valve.", "true" ] }, { "ans": [ "The autopilot system.", "false" ] }, { "ans": [ "The cabin temperature controller.", "false" ] } ] }, { "ch": "How does a piston type shimmy damper function?", "ansGr": [ { "ans": [ "It forces hydraulic fluid through a bleed hole in the piston to dampen oscillation.", "true" ] }, { "ans": [ "It uses an electrical system to absorb vibration.", "false" ] }, { "ans": [ "It compresses air to reduce movement.", "false" ] } ] }, { "ch": "What component keeps pressurized fluid in the working chambers of a vane type shimmy damper?", "ansGr": [ { "ans": [ "An internal spring-loaded replenishing reservoir.", "true" ] }, { "ans": [ "A pneumatic pump.", "false" ] }, { "ans": [ "A hydraulic actuator.", "false" ] } ] }, { "ch": "What should be checked during the inspection of landing gear wheels?", "ansGr": [ { "ans": [ "Cleanliness, corrosion, cracks, and tire wear.", "true" ] }, { "ans": [ "Color, texture, and wheel alignment.", "false" ] }, { "ans": [ "Weight distribution and balance.", "false" ] } ] }, { "ch": "What is the purpose of lubricating the landing gear?", "ansGr": [ { "ans": [ "To reduce friction and wear on moving parts.", "true" ] }, { "ans": [ "To increase the weight of the landing gear.", "false" ] }, { "ans": [ "To improve the visual appearance of the landing gear.", "false" ] } ] }, { "ch": "Where are adjustments typically made to landing gear doors?", "ansGr": [ { "ans": [ "At the hinge installations or connecting links.", "true" ] }, { "ans": [ "At the wheel wells of the aircraft.", "false" ] }, { "ans": [ "At the hydraulic control unit.", "false" ] } ] }, { "ch": "What role does the locking link play in landing gear adjustment?", "ansGr": [ { "ans": [ "It locks the gear securely in the down position to prevent collapse.", "true" ] }, { "ans": [ "It helps to raise the landing gear during takeoff.", "false" ] }, { "ans": [ "It provides additional weight to the landing gear assembly.", "false" ] } ] }, { "ch": "What is the purpose of the groove at the mating surface of a two-piece aircraft wheel?", "ansGr": [ { "ans": [ "To seal the assembly for use with tubeless tires.", "true" ] }, { "ans": [ "To provide a decorative feature.", "false" ] }, { "ans": [ "To enhance the visual appearance of the wheel.", "false" ] } ] }, { "ch": "How do the inboard and outboard wheel halves differ?", "ansGr": [ { "ans": [ "The inboard wheel half has features for mounting the brake rotor, while the outboard half does not.", "true" ] }, { "ans": [ "The outboard half is made from stronger materials than the inboard half.", "false" ] }, { "ans": [ "Both halves are identical in design and function.", "false" ] } ] }, { "ch": "What is a sign that a wheel assembly may need to be removed for inspection?", "ansGr": [ { "ans": [ "Signs of overheating or melted thermal plugs.", "true" ] }, { "ans": [ "Cracked paint on the aircraft body.", "false" ] }, { "ans": [ "Loose cabin doors.", "false" ] } ] }, { "ch": "Why is proper axle nut torque important in aircraft wheel installations?", "ansGr": [ { "ans": [ "To prevent excessive movement of the bearing and wheel assembly.", "true" ] }, { "ans": [ "To ensure the wheel has a decorative appearance.", "false" ] }, { "ans": [ "To increase the speed of the aircraft during taxi.", "false" ] } ] }, { "ch": "What is the correct method to clean the wheel assembly?", "ansGr": [ { "ans": [ "Use the solvent recommended by the wheel manufacturer and a soft brush.", "true" ] }, { "ans": [ "Use abrasive materials to remove any dirt and corrosion.", "false" ] }, { "ans": [ "Clean using water and a metal scraper.", "false" ] } ] }, { "ch": "Why is it necessary to inspect the bead seat area of the wheel?", "ansGr": [ { "ans": [ "It is a high-stress area where cracks can develop due to hard landings.", "true" ] }, { "ans": [ "It is where corrosion is least likely to occur.", "false" ] }, { "ans": [ "It is the easiest area to inspect with a dye penetrant test.", "false" ] } ] }, { "ch": "What is the purpose of fusible plugs in the wheel assembly?", "ansGr": [ { "ans": [ "To release air when the temperature becomes dangerously high.", "true" ] }, { "ans": [ "To balance the weight of the wheel assembly.", "false" ] }, { "ans": [ "To detect cracks in the wheel.", "false" ] } ] }, { "ch": "Why is steam cleaning not recommended for wheel bearings?", "ansGr": [ { "ans": [ "It compromises the surface finish, leading to early failure.", "true" ] }, { "ans": [ "It causes the bearings to expand, making them difficult to remove.", "false" ] }, { "ans": [ "It removes protective lubrication from the bearings.", "false" ] } ] }, { "ch": "What is the correct method to lubricate a tapered roller bearing without a lubrication tool?", "ansGr": [ { "ans": [ "Place grease on the palm, and press the bearing into the grease until all rollers are packed.", "true" ] }, { "ans": [ "Submerge the bearing in a grease-filled container until fully coated.", "false" ] }, { "ans": [ "Apply grease using a brush to the outer surface of the bearing.", "false" ] } ] }, { "ch": "What type of damage can lead to bearing rejection during inspection?", "ansGr": [ { "ans": [ "Galling, spalling, and corrosion.", "true" ] }, { "ans": [ "Minor scratches on the surface.", "false" ] }, { "ans": [ "Discoloration due to grease application.", "false" ] } ] }, { "ch": "What type of braking system is typically found in small, light aircraft?", "ansGr": [ { "ans": [ "Single disc brakes.", "true" ] }, { "ans": [ "Multiple disc brakes.", "false" ] }, { "ans": [ "Floating disc brakes.", "false" ] } ] }, { "ch": "How does a floating disc brake ensure even friction on both sides of the disc?", "ansGr": [ { "ans": [ "By allowing the disc to move laterally in key slots.", "true" ] }, { "ans": [ "By using a rigid connection between the disc and caliper.", "false" ] }, { "ans": [ "By applying pressure only to one side of the disc.", "false" ] } ] }, { "ch": "What is the role of the return spring in a floating disc brake system?", "ansGr": [ { "ans": [ "To ensure the pistons return to their original position after braking.", "true" ] }, { "ans": [ "To maintain constant hydraulic pressure in the system.", "false" ] }, { "ans": [ "To increase the friction applied to the brake disc.", "false" ] } ] }, { "ch": "How does a pilot apply brakes in an independent braking system?", "ansGr": [ { "ans": [ "By pressing on the tops of the rudder pedals.", "true" ] }, { "ans": [ "By using a hand lever in the cockpit.", "false" ] }, { "ans": [ "By activating a switch on the control panel.", "false" ] } ] }, { "ch": "What happens to the hydraulic fluid in a master cylinder when the rudder pedal is depressed?", "ansGr": [ { "ans": [ "It is forced through a line to the brake assembly.", "true" ] }, { "ans": [ "It is stored in a separate reservoir.", "false" ] }, { "ans": [ "It is vented to the atmosphere.", "false" ] } ] }, { "ch": "What is the purpose of the compensating poppet in boosted brakes?", "ansGr": [ { "ans": [ "To provide thermal expansion relief when brakes are not applied.", "true" ] }, { "ans": [ "To increase the braking force when needed.", "false" ] }, { "ans": [ "To isolate the brake fluid from the master cylinder.", "false" ] } ] }, { "ch": "What action does the anti-skid system take when it detects that a wheel is about to skid?", "ansGr": [ { "ans": [ "It reduces hydraulic pressure to the brake on that wheel.", "true" ] }, { "ans": [ "It increases the braking force applied to the wheel.", "false" ] }, { "ans": [ "It disconnects the brake from the hydraulic system completely.", "false" ] } ] }, { "ch": "How does the anti-skid system maintain maximum braking efficiency?", "ansGr": [ { "ans": [ "By monitoring and adjusting the deceleration rate of each wheel.", "true" ] }, { "ans": [ "By continuously increasing hydraulic pressure.", "false" ] }, { "ans": [ "By allowing manual intervention from the pilot during landing.", "false" ] } ] }, { "ch": "What must the pilot do in the flight deck to activate the anti-skid system?", "ansGr": [ { "ans": [ "Turn the anti-skid switch to the ON position.", "true" ] }, { "ans": [ "Adjust the brake pedals manually.", "false" ] }, { "ans": [ "Engage the auto-brake mode.", "false" ] } ] }, { "ch": "Which system component processes signals from the wheel speed sensors?", "ansGr": [ { "ans": [ "The control unit.", "true" ] }, { "ans": [ "The anti-skid control valve.", "false" ] }, { "ans": [ "The hydraulic system.", "false" ] } ] }, { "ch": "What happens to the anti-skid system when the aircraft slows to around 20 mph?", "ansGr": [ { "ans": [ "The system switches to manual braking mode.", "true" ] }, { "ans": [ "It continues automatic operation until the aircraft stops.", "false" ] }, { "ans": [ "The brakes are fully released.", "false" ] } ] }, { "ch": "What type of components are commonly found in an anti-skid system?", "ansGr": [ { "ans": [ "Wheel speed sensors, anti-skid control valves, and a control unit.", "true" ] }, { "ans": [ "Hydraulic pumps, manual levers, and brake pads.", "false" ] }, { "ans": [ "Landing gear motors, hydraulic fluid tanks, and tire sensors.", "false" ] } ] }, { "ch": "How is brake lining wear typically checked on aircraft brakes?", "ansGr": [ { "ans": [ "By applying the brakes and measuring the wear pin.", "true" ] }, { "ans": [ "By visually inspecting the brake pedal.", "false" ] }, { "ans": [ "By checking the brake fluid color.", "false" ] } ] }, { "ch": "What should be done if a technician finds air in the brake system fluid?", "ansGr": [ { "ans": [ "Bleed the system according to the manufacturer's instructions.", "true" ] }, { "ans": [ "Replace the entire brake system.", "false" ] }, { "ans": [ "Ignore the issue until it worsens.", "false" ] } ] }, { "ch": "Which hydraulic fluid types should never be mixed in brake systems?", "ansGr": [ { "ans": [ "Mineral-based and phosphate-ester-based synthetic hydraulic fluids.", "true" ] }, { "ans": [ "Water-based and mineral-based hydraulic fluids.", "false" ] }, { "ans": [ "Oil-based and synthetic-based fluids.", "false" ] } ] }, { "ch": "What is a sign that the brake pedal might need bleeding?", "ansGr": [ { "ans": [ "The brake pedal feels spongy.", "true" ] }, { "ans": [ "The brake pedal makes a clicking sound.", "false" ] }, { "ans": [ "The brake pedal becomes hard to press.", "false" ] } ] }, { "ch": "In a power brake system, why is bottom-up pressure bleeding not used?", "ansGr": [ { "ans": [ "It could force air into the aircraft's main hydraulic system.", "true" ] }, { "ans": [ "It does not provide enough pressure for the system.", "false" ] }, { "ans": [ "It requires specialized equipment unavailable in most hangars.", "false" ] } ] }, { "ch": "What must be done after fixing a leak in the brake system?", "ansGr": [ { "ans": [ "The system should be re-pressurized and tested for function.", "true" ] }, { "ans": [ "The brakes should be replaced entirely.", "false" ] }, { "ans": [ "The fluid should be changed regardless of its condition.", "false" ] } ] }, { "ch": "Why should brake linings be inspected for uneven wear during off-aircraft servicing?", "ansGr": [ { "ans": [ "Uneven wear can indicate a problem with the automatic adjusters or brake housing alignment.", "true" ] }, { "ans": [ "It shows that the brake system needs more fluid.", "false" ] }, { "ans": [ "It may cause increased noise during braking.", "false" ] } ] }, { "ch": "Why are magnetic inspections sometimes used for automatic adjuster pins?", "ansGr": [ { "ans": [ "To inspect for cracks in the pins.", "true" ] }, { "ans": [ "To measure the wear of the pins.", "false" ] }, { "ans": [ "To check for air pockets within the pins.", "false" ] } ] }, { "ch": "What is the function of the torque tube in a brake assembly?", "ansGr": [ { "ans": [ "To hold the brake assembly stable on the landing gear.", "true" ] }, { "ans": [ "To monitor hydraulic fluid levels.", "false" ] }, { "ans": [ "To apply pressure to the brake linings.", "false" ] } ] }, { "ch": "What are the main causes of brake dragging?", "ansGr": [ { "ans": [ "Failure of the return mechanism, warped discs, or air in the brake lines.", "true" ] }, { "ans": [ "Insufficient hydraulic fluid or brake lining wear.", "false" ] }, { "ans": [ "Brake overheating due to excessive braking.", "false" ] } ] }, { "ch": "How does air in the brake fluid cause brake drag?", "ansGr": [ { "ans": [ "Heat causes the air to expand, pushing the brake linings against the disc prematurely.", "true" ] }, { "ans": [ "It reduces the fluid's ability to flow, causing the brakes to respond slowly.", "false" ] }, { "ans": [ "It increases hydraulic pressure, causing brake failure.", "false" ] } ] }, { "ch": "How does brake chattering occur in multiple disc brakes?", "ansGr": [ { "ans": [ "Warped discs cause uneven application of brake pressure, leading to vibration and noise.", "true" ] }, { "ans": [ "Excess air in the brake fluid creates resistance.", "false" ] }, { "ans": [ "Brake pads become loose and start vibrating.", "false" ] } ] }, { "ch": "How do sequence valves C and D operate during the gear retraction process in the hydraulic system?", "ansGr": [ { "ans": [ "They receive fluid pressure but remain closed until the gear is fully stowed, then open to allow door closure.", "true" ] }, { "ans": [ "They open immediately when fluid pressure is applied to begin gear extension.", "false" ] }, { "ans": [ "They control the release of hydraulic pressure back to the manifold.", "false" ] } ] }, { "ch": "What is the role of priority valves in some hydraulic landing gear systems?", "ansGr": [ { "ans": [ "They manage the activation timing of gear components using hydraulic pressure instead of mechanical action.", "true" ] }, { "ans": [ "They act as a backup system in case the sequence valves fail.", "false" ] }, { "ans": [ "They regulate the speed of the landing gear extension process.", "false" ] } ] }, { "ch": "How does the system ensure that the gear doors open before the gear extends during the extension process?", "ansGr": [ { "ans": [ "The fluid flows to the open side of the main gear door actuators before unlocking the main gear uplocks.", "true" ] }, { "ans": [ "The sequence valves automatically open to release the gear doors and uplocks simultaneously.", "false" ] }, { "ans": [ "The gear selector valve bypasses the gear cylinders to activate the doors directly.", "false" ] } ] }, { "ch": "What might be a reason for a technician to become thoroughly familiar with a hydraulic landing gear system?", "ansGr": [ { "ans": [ "Understanding the system’s operation and maintenance is crucial for safe operation.", "true" ] }, { "ans": [ "Knowing the system helps predict hydraulic fluid levels needed for a flight.", "false" ] }, { "ans": [ "Familiarity with the system ensures efficient fuel consumption management.", "false" ] } ] }, { "ch": "What happens if sequence valves A and B are blocked during the gear extension process?", "ansGr": [ { "ans": [ "The main gear uplocks cannot unlock, preventing the gear from extending.", "true" ] }, { "ans": [ "The hydraulic fluid will flow directly to the actuator cylinders, bypassing the gear doors.", "false" ] }, { "ans": [ "The gear will extend at a faster rate than normal.", "false" ] } ] }, { "ch": "In what situation would the restrictors in the orifice check valves become crucial for system operation?", "ansGr": [ { "ans": [ "During the extension of the gear to prevent fast deployment that could cause damage.", "true" ] }, { "ans": [ "When retracting the gear at high speeds to ensure smooth operation.", "false" ] }, { "ans": [ "While engaging the emergency extension system manually.", "false" ] } ] }, { "ch": "How does the system described handle the nose gear differently from the main gear?", "ansGr": [ { "ans": [ "The nose gear operates via mechanical linkage and does not require hydraulic power.", "true" ] }, { "ans": [ "The nose gear is operated with the same hydraulic system as the main gear doors.", "false" ] }, { "ans": [ "The nose gear requires a separate hydraulic pump for extension and retraction.", "false" ] } ] }, { "ch": "What is the function of the selector valve when the flight deck gear selector is in the gear-down position?", "ansGr": [ { "ans": [ "It directs pressurized hydraulic fluid to unlock the nose gear uplock and extend the gear.", "true" ] }, { "ans": [ "It diverts hydraulic fluid away from the main gear cylinders.", "false" ] }, { "ans": [ "It engages the emergency extension system for manual operation.", "false" ] } ] }, { "ch": "What backup system is often used in larger and high-performance aircraft for emergency gear extension?", "ansGr": [ { "ans": [ "Redundant hydraulic systems.", "true" ] }, { "ans": [ "A manual release handle.", "false" ] }, { "ans": [ "Electric motors for gear operation.", "false" ] } ] }, { "ch": "Why might a landing gear retraction test be conducted following a hard or overweight landing?", "ansGr": [ { "ans": [ "To check for potential malfunctions caused by impact stress.", "true" ] }, { "ans": [ "To adjust the aircraft’s tire pressure.", "false" ] }, { "ans": [ "To test the performance of the main hydraulic system.", "false" ] } ] }, { "ch": "What should be inspected during a landing gear retraction test according to general inspection guidelines?", "ansGr": [ { "ans": [ "Proper extension and retraction of the landing gear.", "true" ] }, { "ans": [ "The paint condition of the landing gear doors.", "false" ] }, { "ans": [ "The cleanliness of the aircraft tires.", "false" ] } ] }, { "ch": "What might indicate an issue during a landing gear retraction test, requiring further investigation?", "ansGr": [ { "ans": [ "Unusual sounds like rubbing, binding, or vibration.", "true" ] }, { "ans": [ "The speed of the gear extension being slower than usual.", "false" ] }, { "ans": [ "The emergency lights remaining off during the test.", "false" ] } ] }, { "ch": "How do safety and proximity switches contribute to the landing gear system?", "ansGr": [ { "ans": [ "They ensure the sequential operation of the landing gear based on the air-ground status of the aircraft", "true" ] }, { "ans": [ "They act as physical barriers to prevent the retraction of the gear", "false" ] }, { "ans": [ "They communicate directly with the pilot to inform them of flight speed", "false" ] } ] }, { "ch": "Why is it important for ground locks to be placed during the post-landing walk-around?", "ansGr": [ { "ans": [ "To ensure that the landing gear remains securely locked while the aircraft is on the ground", "true" ] }, { "ans": [ "To adjust the nose wheel alignment for the next flight", "false" ] }, { "ans": [ "To automatically retract the landing gear before takeoff", "false" ] } ] }, { "ch": "What could happen if a nose wheel centering device fails to function properly?", "ansGr": [ { "ans": [ "The nose gear might not align correctly, potentially causing damage during retraction", "true" ] }, { "ans": [ "The aircraft may lose control during takeoff", "false" ] }, { "ans": [ "The pilot may receive incorrect altitude information", "false" ] } ] }, { "ch": "Why are gear position indicators important for pilots?", "ansGr": [ { "ans": [ "They communicate the position status of each individual landing gear at any time", "true" ] }, { "ans": [ "They control the gear retraction process automatically", "false" ] }, { "ans": [ "They ensure the aircraft’s altitude remains stable during flight", "false" ] } ] }, { "ch": "How does the solenoid mechanism work in conjunction with the squat switch during takeoff?", "ansGr": [ { "ans": [ "The solenoid energizes, retracting the lock-pin from the selector handle, allowing the gear to be raised", "true" ] }, { "ans": [ "The solenoid deactivates, keeping the lock-pin in place to maintain the gear position", "false" ] }, { "ans": [ "The solenoid monitors aircraft speed and adjusts the landing gear automatically", "false" ] } ] }, { "ch": "Why is it important for the centering cams to separate when weight returns to the wheels after landing?", "ansGr": [ { "ans": [ "To allow the lower shock strut (piston) to rotate for steering the aircraft", "true" ] }, { "ans": [ "To engage the nose wheel retraction process", "false" ] }, { "ans": [ "To lock the landing gear in place for takeoff", "false" ] } ] }, { "ch": "How does the guide pin on small aircraft function during the retraction of the strut?", "ansGr": [ { "ans": [ "It engages a ramp or track that guides the nose wheel to straighten as it enters the wheel well", "true" ] }, { "ans": [ "It automatically locks the nose wheel in place", "false" ] }, { "ans": [ "It adjusts the altitude information for the pilot", "false" ] } ] }, { "ch": "What role does the safety circuit play when the landing gear strut extends during takeoff?", "ansGr": [ { "ans": [ "It allows current to flow, energizing the solenoid, which retracts the lock-pin from the selector handle", "true" ] }, { "ans": [ "It prevents the gear from retracting by maintaining the lock-pin in place", "false" ] }, { "ans": [ "It monitors the aircraft’s airspeed and adjusts gear position accordingly", "false" ] } ] }, { "ch": "Question 4: Why are proximity sensors preferred over switches with moving parts in the landing gear environment?", "ansGr": [ { "ans": [ "They are less susceptible to contamination from dirt and moisture", "true" ] }, { "ans": [ "They provide real-time speed data to the cockpit", "false" ] }, { "ans": [ "They require less power to operate during flight", "false" ] } ] }, { "ch": "Question 5: What is one advantage of using proximity sensors in modern airline aircraft beyond the landing gear system?", "ansGr": [ { "ans": [ "They monitor the position of cabin entry doors, cargo doors, and thrust reversers", "true" ] }, { "ans": [ "They control the engine power output based on proximity data", "false" ] }, { "ans": [ "They adjust the altitude based on sensor readings", "false" ] } ] }, { "ch": "Question 6: How is proximity sensor information communicated to other systems in modern aircraft like the Boeing 777?", "ansGr": [ { "ans": [ "Through ARINC 629 or 429 data buses", "true" ] }, { "ans": [ "Directly to the pilot via a manual control panel", "false" ] }, { "ans": [ "By wireless transmission to the aircraft control tower", "false" ] } ] }, { "ch": "Question 7: What could be a consequence of an incorrectly installed proximity sensor target in the landing gear system?", "ansGr": [ { "ans": [ "Incorrect voltage readings could lead to a false indication of gear position", "true" ] }, { "ans": [ "The landing gear might fail to retract due to temperature issues", "false" ] }, { "ans": [ "The aircraft’s speed monitoring system could become inaccurate", "false" ] } ] }, { "ch": "How does the metering valve control the direction of hydraulic fluid in the nose wheel steering system?", "ansGr": [ { "ans": [ "It directs hydraulic fluid under pressure to the actuators based on the steering input.", "true" ] }, { "ans": [ "It controls the air conditioning system.", "false" ] }, { "ans": [ "It monitors the fuel level.", "false" ] } ] }, { "ch": "What happens when the piston in the compensator unit compresses the spring to 100 psi?", "ansGr": [ { "ans": [ "The compensator poppet opens, routing return fluid into the hydraulic system return manifold.", "true" ] }, { "ans": [ "The nose gear retracts.", "false" ] }, { "ans": [ "The aircraft altitude is adjusted.", "false" ] } ] }, { "ch": "What function does the follow-up mechanism perform in the nose wheel steering system?", "ansGr": [ { "ans": [ "It returns the metering valve to a neutral position once the steering angle is reached.", "true" ] }, { "ans": [ "It controls the cabin lighting system.", "false" ] }, { "ans": [ "It measures the fuel quantity.", "false" ] } ] }, { "ch": "What must be done to ensure that the steering system functions as a shimmy damper?", "ansGr": [ { "ans": [ "The steering cylinders must be pressurized at all times.", "true" ] }, { "ans": [ "The flight control surfaces must be adjusted.", "false" ] }, { "ans": [ "The autopilot system must be disengaged.", "false" ] } ] }, { "ch": "Why must a piston type shimmy damper be regularly checked for leaks?", "ansGr": [ { "ans": [ "To ensure that it remains filled to capacity for proper operation.", "true" ] }, { "ans": [ "To adjust the alignment of the landing gear.", "false" ] }, { "ans": [ "To test the electrical components.", "false" ] } ] }, { "ch": "How does a vane type shimmy damper dissipate gear oscillation?", "ansGr": [ { "ans": [ "By controlling the rate at which fluid flows through the orifice between chambers.", "true" ] }, { "ans": [ "By using an electric motor to counteract vibration.", "false" ] }, { "ans": [ "By increasing air pressure in the chambers.", "false" ] } ] }, { "ch": "What is the difference between non-hydraulic and hydraulic shimmy dampers?", "ansGr": [ { "ans": [ "Non-hydraulic shimmy dampers use a rubber piston and do not contain fluid.", "true" ] }, { "ans": [ "Hydraulic shimmy dampers use an air-based system.", "false" ] }, { "ans": [ "Non-hydraulic shimmy dampers are filled with hydraulic oil.", "false" ] } ] }, { "ch": "What mechanism does a non-hydraulic shimmy damper use to provide damping?", "ansGr": [ { "ans": [ "A rubber piston rides on a thin film of grease to create surface effect damping.", "true" ] }, { "ans": [ "A metal piston forces hydraulic fluid through a valve.", "false" ] }, { "ans": [ "An electrical motor absorbs the shimmy motion.", "false" ] } ] }, { "ch": "Why is it important to wipe clean the grease fitting before applying grease?", "ansGr": [ { "ans": [ "To prevent dirt and debris from creating an abrasive compound.", "true" ] }, { "ans": [ "To make the grease application process easier.", "false" ] }, { "ans": [ "To ensure the grease adheres properly.", "false" ] } ] }, { "ch": "What is over travel in the context of landing gear adjustment?", "ansGr": [ { "ans": [ "The action of the cylinder piston beyond the necessary movement for extension and retraction.", "true" ] }, { "ans": [ "The distance the landing gear moves during landing.", "false" ] }, { "ans": [ "The total weight the landing gear can support.", "false" ] } ] }, { "ch": "What must be inspected to ensure landing gear latches operate correctly?", "ansGr": [ { "ans": [ "Clearances and dimensional measurements of rollers, shafts, and bolts.", "true" ] }, { "ans": [ "The color and texture of the latches.", "false" ] }, { "ans": [ "The amount of lubricant used on the latches.", "false" ] } ] }, { "ch": "How are landing gear door latches typically disengaged in the gear-down sequence?", "ansGr": [ { "ans": [ "By the spring load on the linkage.", "true" ] }, { "ans": [ "By applying hydraulic pressure.", "false" ] }, { "ans": [ "By manually pulling a release lever.", "false" ] } ] }, { "ch": "What could happen if landing gear doors are too tight or too loose?", "ansGr": [ { "ans": [ "Tight doors can cause structural damage, while loose doors can catch wind and lead to wear and potential failure.", "true" ] }, { "ans": [ "Tight doors enhance aerodynamics, while loose doors improve maintenance access.", "false" ] }, { "ans": [ "Tight doors prevent noise during flight, while loose doors decrease drag.", "false" ] } ] }, { "ch": "How should adjustments to the side brace locking link be performed?", "ansGr": [ { "ans": [ "The aircraft must be placed on jacks with the landing gear in the down position to adjust the lock link end fitting.", "true" ] }, { "ans": [ "The adjustments can be made without jacking the aircraft.", "false" ] }, { "ans": [ "Adjustments are only required during flight operations.", "false" ] } ] }, { "ch": "What is the purpose of checking down lock spring tension?", "ansGr": [ { "ans": [ "To ensure proper operation and secure locking of the landing gear in the down position.", "true" ] }, { "ans": [ "To determine the weight of the landing gear.", "false" ] }, { "ans": [ "To increase the speed of the landing gear retraction.", "false" ] } ] }, { "ch": "What is the allowable tension range for the down lock spring on the landing gear?", "ansGr": [ { "ans": [ "Between 40 and 60 pounds.", "true" ] }, { "ans": [ "Between 10 and 20 pounds.", "false" ] }, { "ans": [ "Between 70 and 90 pounds.", "false" ] } ] }, { "ch": "What is the purpose of thermal plugs in the inner wheel half of high-performance aircraft wheels?", "ansGr": [ { "ans": [ "To melt and deflate the tire before temperatures reach explosion levels.", "true" ] }, { "ans": [ "To prevent the wheel from rolling during landing.", "false" ] }, { "ans": [ "To enhance the aerodynamics of the aircraft.", "false" ] } ] }, { "ch": "What happens if a thermal plug in the inner wheel half melts?", "ansGr": [ { "ans": [ "The tire must be removed from service, and the wheel inspected before return to service.", "true" ] }, { "ans": [ "The tire can continue to be used without any issues.", "false" ] }, { "ans": [ "The aircraft must undergo a full maintenance check.", "false" ] } ] }, { "ch": "Why is the bead seat area of the wheel critical?", "ansGr": [ { "ans": [ "It accepts significant tensile loads from the tire during landing.", "true" ] }, { "ans": [ "It serves as a decorative feature of the wheel.", "false" ] }, { "ans": [ "It prevents air from escaping from the tire.", "false" ] } ] }, { "ch": "What is the function of the overinflation safety plug in the inner wheel half?", "ansGr": [ { "ans": [ "To rupture and release all air in the tire if it becomes over-inflated.", "true" ] }, { "ans": [ "To enhance the performance of the wheel during takeoff.", "false" ] }, { "ans": [ "To improve fuel efficiency by maintaining optimal tire pressure.", "false" ] } ] }, { "ch": "What could happen if an axle nut is too loose on an aircraft wheel?", "ansGr": [ { "ans": [ "The bearing cup could loosen and spin, damaging the wheel.", "true" ] }, { "ans": [ "The wheel could improve its performance.", "false" ] }, { "ans": [ "The wheel would remain unaffected.", "false" ] } ] }, { "ch": "What should a technician look for when inspecting the wheels for overheating?", "ansGr": [ { "ans": [ "Any signs of the fusible alloy in thermal plugs having melted.", "true" ] }, { "ans": [ "The color of the paint on the wheels.", "false" ] }, { "ans": [ "The size of the wheel assembly.", "false" ] } ] }, { "ch": "What are the consequences of over-torquing an axle nut on an aircraft wheel?", "ansGr": [ { "ans": [ "It can prevent the bearing from properly accepting the weight load, leading to bearing failure.", "true" ] }, { "ans": [ "It will enhance the performance of the wheel during takeoff.", "false" ] }, { "ans": [ "It has no effect on the wheel assembly.", "false" ] } ] }, { "ch": "What must be secure for proper installation of the wheels on an aircraft?", "ansGr": [ { "ans": [ "All wheel tie bolts and nuts.", "true" ] }, { "ans": [ "Only the tire pressure.", "false" ] }, { "ans": [ "The color of the wheel paint.", "false" ] } ] }, { "ch": "Why is it important to let aircraft tires cool for three hours before removal?", "ansGr": [ { "ans": [ "To prevent potential accidents caused by high temperature and pressure.", "true" ] }, { "ans": [ "To ensure that the technician can apply enough torque to the axle nut.", "false" ] }, { "ans": [ "To allow time for the wheel to deflate naturally.", "false" ] } ] }, { "ch": "How should the wheel bearing be handled during disassembly?", "ansGr": [ { "ans": [ "It should be removed and set aside for cleaning and inspection.", "true" ] }, { "ans": [ "It should be left in the wheel until the tie bolts are removed.", "false" ] }, { "ans": [ "It should be removed using an impact tool.", "false" ] } ] }, { "ch": "Why is it critical to avoid abrasive techniques when cleaning the wheel halves?", "ansGr": [ { "ans": [ "Abrasive methods can remove the wheel finish and lead to corrosion.", "true" ] }, { "ans": [ "It makes the cleaning process slower and less effective.", "false" ] }, { "ans": [ "It can cause the wheel to lose its balance.", "false" ] } ] }, { "ch": "What is the recommended inspection method for detecting cracks in the bead seat area?", "ansGr": [ { "ans": [ "Eddy current inspection.", "true" ] }, { "ans": [ "Dye penetrant inspection.", "false" ] }, { "ans": [ "Magnetic particle inspection.", "false" ] } ] }, { "ch": "How should balance weights be managed during the inspection and cleaning process?", "ansGr": [ { "ans": [ "They should be removed and re-fastened in their original position.", "true" ] }, { "ans": [ "They should be replaced with new weights after cleaning.", "false" ] }, { "ans": [ "They should be left in place and not removed during cleaning.", "false" ] } ] }, { "ch": "Why should only one tire and wheel assembly be removed at a time from a pair?", "ansGr": [ { "ans": [ "To minimize damage if the aircraft falls off its jack.", "true" ] }, { "ans": [ "To speed up the wheel inspection process.", "false" ] }, { "ans": [ "To allow both wheels to be cleaned simultaneously.", "false" ] } ] }, { "ch": "Why should gasoline or jet fuel not be used to clean wheel bearings?", "ansGr": [ { "ans": [ "They are not approved solvents and can damage the bearing surfaces.", "true" ] }, { "ans": [ "They are less effective at removing grease.", "false" ] }, { "ans": [ "They do not evaporate quickly enough for the drying process.", "false" ] } ] }, { "ch": "How should a bearing cup be removed if it is firmly seated in the wheel half boss?", "ansGr": [ { "ans": [ "Heat the wheel in a controlled oven and tap it out with a non-metallic drift.", "true" ] }, { "ans": [ "Use an impact tool to force the cup out of place.", "false" ] }, { "ans": [ "Apply cold water to loosen and remove the cup.", "false" ] } ] }, { "ch": "What does a bluish tint on the bearing surface indicate?", "ansGr": [ { "ans": [ "Overheating due to insufficient lubrication.", "true" ] }, { "ans": [ "Exposure to low temperatures during operation.", "false" ] }, { "ans": [ "Proper lubrication and maintenance.", "false" ] } ] }, { "ch": "What is the main cause of false brinelling in wheel bearings?", "ansGr": [ { "ans": [ "Vibration while the bearing is in a static state.", "true" ] }, { "ans": [ "Excessive torque during installation.", "false" ] }, { "ans": [ "Overheating from high-speed rotation.", "false" ] } ] }, { "ch": "How should the wheel bearing be dried after cleaning?", "ansGr": [ { "ans": [ "Direct a blast of dry air between the rollers without rotating the bearing.", "true" ] }, { "ans": [ "Use a cloth to wipe the surface of the bearing.", "false" ] }, { "ans": [ "Let it air dry naturally in an open area.", "false" ] } ] }, { "ch": "What is the purpose of using a pressure bearing packing tool?", "ansGr": [ { "ans": [ "To remove any contaminants from inside the bearing after cleaning.", "true" ] }, { "ans": [ "To seal the bearing for long-term storage.", "false" ] }, { "ans": [ "To apply a lubricant suitable for all types of bearings.", "false" ] } ] }, { "ch": "How do carbon brakes compare to conventional steel brakes in terms of weight and performance?", "ansGr": [ { "ans": [ "Carbon brakes are lighter and can withstand higher temperatures.", "true" ] }, { "ans": [ "Carbon brakes are heavier and have shorter lifespans.", "false" ] }, { "ans": [ "Carbon brakes perform similarly to steel brakes but are less expensive.", "false" ] } ] }, { "ch": "What mechanism allows a fixed disc brake to apply equal pressure on both sides of the disc?", "ansGr": [ { "ans": [ "The floating caliper design that adjusts position during braking.", "true" ] }, { "ans": [ "The rigid attachment of the disc to the wheel.", "false" ] }, { "ans": [ "The use of a single hydraulic piston for both sides of the disc.", "false" ] } ] }, { "ch": "What is a significant advantage of segmented rotor disc brakes in large aircraft?", "ansGr": [ { "ans": [ "They are designed to better dissipate heat generated during braking.", "true" ] }, { "ans": [ "They require less maintenance than traditional disc brakes.", "false" ] }, { "ans": [ "They are more complex and difficult to repair.", "false" ] } ] }, { "ch": "What is a common issue with expander tube brakes that led to their decline in use?", "ansGr": [ { "ans": [ "They tend to swell with temperature and may leak.", "true" ] }, { "ans": [ "They are too heavy for modern aircraft.", "false" ] }, { "ans": [ "They require frequent replacement of brake blocks.", "false" ] } ] }, { "ch": "How does the self-adjusting feature in floating disc brakes work?", "ansGr": [ { "ans": [ "It maintains a consistent clearance between the brake linings and the disc.", "true" ] }, { "ans": [ "It automatically increases brake pressure when needed.", "false" ] }, { "ans": [ "It adjusts the position of the caliper based on wear.", "false" ] } ] }, { "ch": "How do power brakes differ from independent braking systems in terms of hydraulic pressure?", "ansGr": [ { "ans": [ "Power brakes use the aircraft's main hydraulic system for pressure.", "true" ] }, { "ans": [ "Power brakes rely solely on the pilot's foot pressure.", "false" ] }, { "ans": [ "Power brakes require no hydraulic fluid at all.", "false" ] } ] }, { "ch": "What is the role of the brake control valve in a power brake system?", "ansGr": [ { "ans": [ "It directs hydraulic fluid to the brakes based on pedal input.", "true" ] }, { "ans": [ "It maintains a constant pressure regardless of pedal input.", "false" ] }, { "ans": [ "It prevents fluid loss in case of a hydraulic failure.", "false" ] } ] }, { "ch": "How does the brake metering valve enhance the pilot's control during braking?", "ansGr": [ { "ans": [ "It allows for proportional hydraulic fluid flow based on pedal pressure.", "true" ] }, { "ans": [ "It limits the maximum pressure applied to the brakes.", "false" ] }, { "ans": [ "It automatically engages the brakes when the gear is retracted.", "false" ] } ] }, { "ch": "What role does the brake accumulator play in a power brake system?", "ansGr": [ { "ans": [ "It serves as an emergency source of power for the brakes.", "true" ] }, { "ans": [ "It prevents hydraulic fluid leakage.", "false" ] }, { "ans": [ "It automatically applies the brakes during takeoff.", "false" ] } ] }, { "ch": "How does the shuttle valve function in an emergency brake system?", "ansGr": [ { "ans": [ "It shifts to accept an alternate source of brake power when primary pressure is lost.", "true" ] }, { "ans": [ "It maintains constant pressure in the brake system.", "false" ] }, { "ans": [ "It directs hydraulic fluid to the landing gear.", "false" ] } ] }, { "ch": "What mechanism is used to hold the parking brake in place?", "ansGr": [ { "ans": [ "A ratcheting system connected to the parking brake lever.", "true" ] }, { "ans": [ "A hydraulic lock that engages when pressure is released.", "false" ] }, { "ans": [ "An electronic sensor that detects the brake position.", "false" ] } ] }, { "ch": "How does the emergency brake system ensure effective braking during hydraulic system failure?", "ansGr": [ { "ans": [ "By utilizing independently supplied brake assemblies.", "true" ] }, { "ans": [ "By automatically applying the brakes when the pilot loses control.", "false" ] }, { "ans": [ "By diverting fuel to the brake system.", "false" ] } ] }, { "ch": "What happens when the parking brake lever is pulled on the flight deck?", "ansGr": [ { "ans": [ "The brakes are applied and a shut-off valve in the return line is closed.", "true" ] }, { "ans": [ "The hydraulic fluid is vented to the atmosphere.", "false" ] }, { "ans": [ "The aircraft's speed is increased to prevent rolling.", "false" ] } ] }, { "ch": "How does the combination of a ratcheting system and a shut-off valve work in the parking brake system?", "ansGr": [ { "ans": [ "It allows for the brakes to be held in place while trapping hydraulic fluid.", "true" ] }, { "ans": [ "It ensures that the brakes can only be applied during takeoff.", "false" ] }, { "ans": [ "It maintains constant pressure on the brake rotors.", "false" ] } ] }, { "ch": "How does the anti-skid system anticipate and prevent a potential skid situation when the aircraft lands at high speed?", "ansGr": [ { "ans": [ "It monitors the deceleration rate and adjusts hydraulic pressure accordingly.", "true" ] }, { "ans": [ "It waits for the pilot to manually adjust the brake pressure.", "false" ] }, { "ans": [ "It increases brake pressure immediately to slow down the wheels faster.", "false" ] } ] }, { "ch": "What could happen if the anti-skid system fails to relieve hydraulic pressure when a skid is detected?", "ansGr": [ { "ans": [ "The tire may blow out, leading to possible damage and loss of control.", "true" ] }, { "ans": [ "The aircraft will maintain its normal braking efficiency.", "false" ] }, { "ans": [ "The pilot will have to apply manual braking to correct the situation.", "false" ] } ] }, { "ch": "Why is it essential for the anti-skid system to switch to manual braking mode when the aircraft slows to approximately 20 mph?", "ansGr": [ { "ans": [ "For better control during taxi and ground maneuvering.", "true" ] }, { "ans": [ "To ensure the system continues operating efficiently until the aircraft stops.", "false" ] }, { "ans": [ "To maintain constant brake pressure regardless of wheel speed.", "false" ] } ] }, { "ch": "How do wheel speed sensors contribute to the overall function of the anti-skid system?", "ansGr": [ { "ans": [ "They provide real-time feedback on wheel speed to the control unit.", "true" ] }, { "ans": [ "They adjust hydraulic pressure levels directly.", "false" ] }, { "ans": [ "They indicate hydraulic fluid levels to the flight deck.", "false" ] } ] }, { "ch": "What role does the control unit play in the anti-skid system’s operation?", "ansGr": [ { "ans": [ "It processes signals from the wheel sensors to determine if a skid is imminent.", "true" ] }, { "ans": [ "It applies hydraulic pressure to the brakes.", "false" ] }, { "ans": [ "It monitors tire conditions and relays information to the flight deck.", "false" ] } ] }, { "ch": "Why is it necessary for the anti-skid control valves to respond quickly to signals from the control unit?", "ansGr": [ { "ans": [ "To adjust brake pressure precisely and avoid skidding.", "true" ] }, { "ans": [ "To manually engage the braking system if the pilot requests it.", "false" ] }, { "ans": [ "To release hydraulic fluid completely for emergency stops.", "false" ] } ] }, { "ch": "What happens when the anti-skid system detects a wheel decelerating faster than a preset rate?", "ansGr": [ { "ans": [ "Hydraulic pressure is reduced to that wheel to prevent skidding.", "true" ] }, { "ans": [ "The control unit increases hydraulic pressure to the wheel.", "false" ] }, { "ans": [ "The system signals the pilot to manually adjust the braking.", "false" ] } ] }, { "ch": "Why might a locked wheel protection feature be crucial during landing?", "ansGr": [ { "ans": [ "It ensures that the brakes are released if a wheel is not rotating, preventing tire damage.", "true" ] }, { "ans": [ "It applies additional pressure to keep the wheel in place.", "false" ] }, { "ans": [ "It overrides the anti-skid system to allow for faster deceleration.", "false" ] } ] }, { "ch": "What happens if one wheel in a paired group rotates slower than the other during landing?", "ansGr": [ { "ans": [ "The anti-skid system relieves pressure to balance the wheel speeds.", "true" ] }, { "ans": [ "The system engages full brake pressure to the slower wheel.", "false" ] }, { "ans": [ "The pilot is alerted to manually adjust the pressure.", "false" ] } ] }, { "ch": "How does the anti-skid system contribute to overall safety during an aircraft’s landing sequence?", "ansGr": [ { "ans": [ "By automatically preventing skidding and adjusting braking pressure for optimal performance.", "true" ] }, { "ans": [ "By maintaining manual control over the brake system for the pilot.", "false" ] }, { "ans": [ "By locking the wheels immediately to stop the aircraft faster.", "false" ] } ] }, { "ch": "What function does the touchdown protection mode serve in an anti-skid system?", "ansGr": [ { "ans": [ "It prevents brake pressure from building up before the aircraft makes contact with the runway.", "true" ] }, { "ans": [ "It engages the brakes as soon as the aircraft’s wheels touch the ground.", "false" ] }, { "ans": [ "It allows the pilot to manually control braking pressure upon landing.", "false" ] } ] }, { "ch": "How does the control unit differentiate the speed of the wheel from the aircraft’s speed for optimum braking efficiency?", "ansGr": [ { "ans": [ "It compares the output from the wheel sensor to a reference velocity loop.", "true" ] }, { "ans": [ "It uses a manual override switch to adjust the speed.", "false" ] }, { "ans": [ "It matches the hydraulic pressure based on the pilot’s input.", "false" ] } ] }, { "ch": "What advantage does having individual control circuitry cards for each wheel provide in the Boeing anti-skid system?", "ansGr": [ { "ans": [ "It allows for simultaneous operation and independent control of each wheel.", "true" ] }, { "ans": [ "It reduces the overall weight of the aircraft's braking system.", "false" ] }, { "ans": [ "It ensures all wheels receive the same hydraulic pressure regardless of speed.", "false" ] } ] }, { "ch": "What might occur if the anti-skid control valve’s flapper position is not properly adjusted?", "ansGr": [ { "ans": [ "The braking pressure could be too high or too low, leading to inefficient braking or skidding.", "true" ] }, { "ans": [ "The wheel speed sensor would fail to send accurate signals.", "false" ] }, { "ans": [ "The system would automatically switch to manual mode.", "false" ] } ] }, { "ch": "How does the anti-skid system ensure that brake pressure is maintained within the effective braking range?", "ansGr": [ { "ans": [ "By adjusting the flapper position in the anti-skid control valve to balance pressure.", "true" ] }, { "ans": [ "By constantly releasing hydraulic pressure regardless of wheel speed.", "false" ] }, { "ans": [ "By signaling the pilot to apply manual adjustments during landing.", "false" ] } ] }, { "ch": "Why are anti-skid control valves positioned close to the main wheel assemblies?", "ansGr": [ { "ans": [ "To provide quick access to hydraulic pressure and brake assemblies for efficient operation.", "true" ] }, { "ans": [ "To allow easy monitoring by the pilot during flight.", "false" ] }, { "ans": [ "To connect directly to the aircraft’s electrical system.", "false" ] } ] }, { "ch": "What is the role of the comparator circuit in the Boeing anti-skid control system?", "ansGr": [ { "ans": [ "It compares the speed of paired wheels to detect skidding and adjust brake pressure.", "true" ] }, { "ans": [ "It signals the pilot to monitor brake performance manually.", "false" ] }, { "ans": [ "It maintains a constant pressure regardless of wheel speed differences.", "false" ] } ] }, { "ch": "In the anti-skid system, how does the transient control output contribute to preventing wheel skidding?", "ansGr": [ { "ans": [ "It rapidly reduces brake pressure when a sudden skid is detected.", "true" ] }, { "ans": [ "It increases hydraulic fluid flow to counteract wheel deceleration.", "false" ] }, { "ans": [ "It overrides the wheel speed sensor for manual control.", "false" ] } ] }, { "ch": "How does the anti-skid system use velocity reference loops to maintain effective braking?", "ansGr": [ { "ans": [ "By comparing aircraft speed to wheel speed and adjusting brake pressure.", "true" ] }, { "ans": [ "By matching hydraulic pressure to the landing gear extension.", "false" ] }, { "ans": [ "By monitoring pilot input and adjusting accordingly.", "false" ] } ] }, { "ch": "What could be the result of a malfunctioning anti-skid system during a landing?", "ansGr": [ { "ans": [ "It may lead to uncontrolled skidding, tire damage, or loss of aircraft control.", "true" ] }, { "ans": [ "The aircraft would stop more quickly due to manual braking efforts.", "false" ] }, { "ans": [ "The system would automatically switch off without any impact.", "false" ] } ] }, { "ch": "Why is it important to consult the manufacturer's maintenance manual when servicing brakes?", "ansGr": [ { "ans": [ "To ensure correct procedures are followed for specific systems and prevent system failure.", "true" ] }, { "ans": [ "To compare wear levels of different brake components.", "false" ] }, { "ans": [ "To find the correct torque specifications for brake bolts.", "false" ] } ] }, { "ch": "What are the consequences of not monitoring brake fluid quantity levels regularly?", "ansGr": [ { "ans": [ "Insufficient fluid can lead to air entering the system, reducing brake performance and potentially causing failure.", "true" ] }, { "ans": [ "Fluid overflow can cause damage to the brake linings.", "false" ] }, { "ans": [ "Excess fluid can reduce braking efficiency by making the pedal too firm.", "false" ] } ] }, { "ch": "What could happen if the brake linings are not replaced when worn beyond limits?", "ansGr": [ { "ans": [ "The brakes will lose their effectiveness, possibly leading to a dangerous situation during landing or takeoff.", "true" ] }, { "ans": [ "The brake fluid may start to leak due to reduced pressure.", "false" ] }, { "ans": [ "The hydraulic system will overheat, causing the seals to fail.", "false" ] } ] }, { "ch": "How do multiple disc brakes differ from other types when measuring lining wear?", "ansGr": [ { "ans": [ "They are measured by the distance between the back of the pressure plate and the brake housing, unlike single disc systems which use wear indicator pins.", "true" ] }, { "ans": [ "They require manual adjustments for wear.", "false" ] }, { "ans": [ "They do not need regular wear monitoring.", "false" ] } ] }, { "ch": "What steps should be taken to ensure brake linings are measured correctly when different assemblies use varying methods?", "ansGr": [ { "ans": [ "The manufacturer’s maintenance instructions should be carefully followed to ensure the correct procedure is used for each specific brake system.", "true" ] }, { "ans": [ "Brake linings should be removed for accurate measurement.", "false" ] }, { "ans": [ "The wear indicator should be tested after each brake application to check for accuracy.", "false" ] } ] }, { "ch": "How should linings on multiple disc brakes be measured for wear during routine maintenance?", "ansGr": [ { "ans": [ "The distance between the pressure plate and brake housing should be measured when the brakes are applied.", "true" ] }, { "ans": [ "The wear pin should be checked for protrusion beyond the nut.", "false" ] }, { "ans": [ "The hydraulic fluid pressure should be monitored for changes.", "false" ] } ] }, { "ch": "What is the proper procedure for measuring brake wear using a wear indicator pin on Goodyear brakes?", "ansGr": [ { "ans": [ "Measure the length of the pin where it protrudes through the nut of the automatic adjuster.", "true" ] }, { "ans": [ "Compare the pin's length to the hydraulic pressure in the system.", "false" ] }, { "ans": [ "Measure the distance between the pin and the brake linings.", "false" ] } ] }, { "ch": "Why is it crucial to bleed brake systems after repairs involving opening the brake system?", "ansGr": [ { "ans": [ "Any trapped air must be removed to prevent spongy brake feel and ensure firm brake pedal response.", "true" ] }, { "ans": [ "It is necessary to remove excess fluid to maintain system balance.", "false" ] }, { "ans": [ "To avoid overheating the hydraulic fluid, which could damage the system.", "false" ] } ] }, { "ch": "What steps should be taken to properly bleed a master cylinder brake system using pressure bleeding?", "ansGr": [ { "ans": [ "Attach the pressure tank hose to the bleed port, open the valve to allow fluid flow, monitor for air bubbles, then close the bleed port when bubbles stop.", "true" ] }, { "ans": [ "Pump the brake pedal to build pressure, then open the bleed valve to release air.", "false" ] }, { "ans": [ "Remove the master cylinder and flush the system with new hydraulic fluid.", "false" ] } ] }, { "ch": "What are the potential risks of improper bleeding of power brake systems?", "ansGr": [ { "ans": [ "Air trapped in the system could be forced into the main hydraulic system, leading to potential system failure.", "true" ] }, { "ans": [ "Hydraulic fluid may overheat, causing damage to the brake assembly.", "false" ] }, { "ans": [ "Brake linings could wear unevenly, causing inefficient braking.", "false" ] } ] }, { "ch": "Why must air be carefully removed from power brake systems during the bleeding process?", "ansGr": [ { "ans": [ "Trapped air can cause malfunctioning of both the brake and the hydraulic system, compromising the aircraft’s overall safety.", "true" ] }, { "ans": [ "Air can reduce brake lining wear resistance, causing premature replacement.", "false" ] }, { "ans": [ "Air will cause the hydraulic fluid to foam, reducing braking power.", "false" ] } ] }, { "ch": "What are the risks of mixing different types of hydraulic fluid in aircraft brake systems?", "ansGr": [ { "ans": [ "Mixing fluids can cause deterioration and failure of seals, requiring the system to be fully evacuated and seals replaced before the aircraft is deemed airworthy.", "true" ] }, { "ans": [ "It can lead to increased brake fluid pressure, making the brakes too sensitive.", "false" ] }, { "ans": [ "The fluid mixture may cause the brake linings to harden prematurely.", "false" ] } ] }, { "ch": "What could happen if a brake system fitting is overtightened?", "ansGr": [ { "ans": [ "Overtightening can damage the fitting, potentially worsening leaks and causing brake system failure.", "true" ] }, { "ans": [ "It may seal the system completely, preventing fluid flow.", "false" ] }, { "ans": [ "The brake lining could become loose, leading to ineffective braking.", "false" ] } ] }, { "ch": "How does the presence of leaks in a brake system affect performance, and what should be done when leaks are found?", "ansGr": [ { "ans": [ "Leaks reduce hydraulic pressure, weakening braking power. Any leaks should be investigated and repaired, and the system re-pressurized to check for further leaks.", "true" ] }, { "ans": [ "Leaks increase brake lining wear, requiring frequent replacement.", "false" ] }, { "ans": [ "Leaks may cause the brakes to lock up, so the system should be flushed.", "false" ] } ] }, { "ch": "Why must the brake system be re-pressurized after a leak repair?", "ansGr": [ { "ans": [ "To ensure the system functions properly and no further leaks are present.", "true" ] }, { "ans": [ "To restore hydraulic fluid levels to optimal pressure.", "false" ] }, { "ans": [ "To remove air trapped in the fluid lines.", "false" ] } ] }, { "ch": "Why should the technician ensure correct bolt torque during brake assembly attachment?", "ansGr": [ { "ans": [ "Improper torque can cause the brakes to become loose, leading to failure during landing or takeoff.", "true" ] }, { "ans": [ "It increases hydraulic fluid pressure, causing brake failure.", "false" ] }, { "ans": [ "It ensures the brake linings wear evenly.", "false" ] } ] }, { "ch": "Why is using non-approved hardware in aircraft brake systems dangerous?", "ansGr": [ { "ans": [ "Substituting standard hardware for specialized brake components can lead to brake failure due to differences in material strength and tolerance.", "true" ] }, { "ans": [ "Non-approved hardware may increase system pressure, causing brake drag.", "false" ] }, { "ans": [ "Non-standard parts may cause misalignment of brake linings and discs.", "false" ] } ] }, { "ch": "What must be done if excessive brake disc glazing is observed during inspection?", "ansGr": [ { "ans": [ "The brake disc may need to be resurfaced or replaced if allowed by the manufacturer.", "true" ] }, { "ans": [ "The brake linings should be replaced with harder material to prevent further glazing.", "false" ] }, { "ans": [ "The hydraulic fluid should be drained and replaced to reduce brake temperature.", "false" ] } ] }, { "ch": "How can uneven brake lining wear be prevented, and what should be done if uneven wear is detected?", "ansGr": [ { "ans": [ "Regularly monitor brake wear and check for misaligned parts. If uneven wear is detected, adjust or replace the affected components according to manufacturer’s guidelines.", "true" ] }, { "ans": [ "Add more hydraulic fluid to compensate for wear.", "false" ] }, { "ans": [ "Bleed the system frequently to remove any trapped air causing the issue.", "false" ] } ] }, { "ch": "What can be the result of excessive glazing on brake discs, and what should be done if glazing is found?", "ansGr": [ { "ans": [ "Excessive glazing leads to brake squeal and chatter. The disc should be resurfaced or replaced if allowed by the manufacturer.", "true" ] }, { "ans": [ "Glazing increases hydraulic fluid usage, so the system should be refilled.", "false" ] }, { "ans": [ "Glazed discs should be cleaned with a solvent to restore performance.", "false" ] } ] }, { "ch": "Why is magnetic particle inspection used on torque tubes during brake system maintenance?", "ansGr": [ { "ans": [ "To detect cracks that may not be visible during visual inspection, ensuring the tube’s integrity and preventing failure.", "true" ] }, { "ans": [ "To ensure the tube is aligned correctly within the system.", "false" ] }, { "ans": [ "To check for air pockets within the torque tube.", "false" ] } ] }, { "ch": "What type of damage should be inspected in brake housings?", "ansGr": [ { "ans": [ "Scratches, gouges, and cracks.", "true" ] }, { "ans": [ "Worn-out brake linings.", "false" ] }, { "ans": [ "Misaligned brake discs.", "false" ] } ] }, { "ch": "What should be done if a brake housing is found with cracks?", "ansGr": [ { "ans": [ "The housing must be replaced.", "true" ] }, { "ans": [ "The cracks should be filled and the housing re-installed.", "false" ] }, { "ans": [ "The cracks should be ignored if they are minor.", "false" ] } ] }, { "ch": "What is the role of Teflon® back-up rings in brake seal grooves?", "ansGr": [ { "ans": [ "To support the O-ring seals and reduce the risk of fluid leakage.", "true" ] }, { "ans": [ "To absorb excess hydraulic fluid.", "false" ] }, { "ans": [ "To prevent corrosion in the brake system.", "false" ] } ] }, { "ch": "Why is it essential to monitor and replace brake seals regularly during off-aircraft brake maintenance?", "ansGr": [ { "ans": [ "Over time, seals harden and lose their elasticity, leading to leaks that can compromise brake performance or cause failure.", "true" ] }, { "ans": [ "Seals can expand and reduce hydraulic pressure if not maintained.", "false" ] }, { "ans": [ "Worn seals cause excessive wear on brake linings, leading to overheating.", "false" ] } ] }, { "ch": "What are the risks of not replacing worn seals in brake assemblies?", "ansGr": [ { "ans": [ "Worn seals can leak, causing loss of brake power and eventual system failure. Seals should be replaced during routine maintenance to avoid brake failure.", "true" ] }, { "ans": [ "They may cause the brake linings to overheat, reducing effectiveness.", "false" ] }, { "ans": [ "Seals prevent air from entering the hydraulic system, so failure to replace them leads to air pockets.", "false" ] } ] }, { "ch": "How does brake overheating lead to system failure, and what steps should be taken if overheating is detected?", "ansGr": [ { "ans": [ "Overheating weakens brake components, causing potential failure under high-pressure braking. The system must be removed and inspected for cracks, warping, and loss of heat treatment.", "true" ] }, { "ans": [ "The hydraulic fluid should be drained and the system left to cool before reuse.", "false" ] }, { "ans": [ "Brake linings should be immediately replaced, even if no visible damage is present.", "false" ] } ] }, { "ch": "How does overheating affect brake linings and discs, and what should be inspected after brake overheating?", "ansGr": [ { "ans": [ "Overheating weakens both linings and discs, which must be inspected for warping, cracks, and damage to surface treatments.", "true" ] }, { "ans": [ "Overheating increases hydraulic pressure, requiring fluid replacement.", "false" ] }, { "ans": [ "The entire brake system must be removed and cleaned after overheating.", "false" ] } ] }, { "ch": "How does brake drag caused by air in the brake fluid impact the system during operation?", "ansGr": [ { "ans": [ "Air expands with heat, pushing the brake linings against the disc and causing continuous braking, leading to excessive wear and possible overheating.", "true" ] }, { "ans": [ "The air reduces hydraulic pressure, preventing the brakes from engaging properly.", "false" ] }, { "ans": [ "Air creates resistance in the brake lines, causing slow brake response.", "false" ] } ] }, { "ch": "What must be checked when a brake system shows signs of dragging?", "ansGr": [ { "ans": [ "The return mechanism, such as return springs and auto-adjusters, must be inspected for malfunction. The system should also be checked for air in the brake fluid.", "true" ] }, { "ans": [ "The brake housing must be cleaned to ensure no foreign objects are causing drag.", "false" ] }, { "ans": [ "The hydraulic system must be bled and refilled with new fluid to restore proper pressure.", "false" ] } ] }, { "ch": "What steps must be taken when brake drag is caused by air in the fluid line?", "ansGr": [ { "ans": [ "The brakes should be bled to remove the air, preventing expansion and further drag.", "true" ] }, { "ans": [ "The hydraulic system should be drained and cleaned to remove impurities.", "false" ] }, { "ans": [ "The brake assembly should be removed and inspected for damage.", "false" ] } ] }, { "ch": "What should be done if the brake return mechanism is not functioning correctly, causing brake drag?", "ansGr": [ { "ans": [ "The auto-adjusters and return springs should be inspected for weakness or slippage and replaced if necessary.", "true" ] }, { "ans": [ "More hydraulic fluid should be added to compensate for the drag.", "false" ] }, { "ans": [ "The brake discs should be replaced with newer ones.", "false" ] } ] }, { "ch": "What causes brake chatter or squeal, and how can it be corrected?", "ansGr": [ { "ans": [ "Warped discs or misaligned brake stacks can cause chattering and squealing. Correcting disc alignment or replacing the warped discs resolves the issue.", "true" ] }, { "ans": [ "Excessive air in the hydraulic fluid increases resistance, leading to noise.", "false" ] }, { "ans": [ "Overuse of the brake system may cause overheating, resulting in squealing.", "false" ] } ] }, { "ch": "What is the purpose of the air-ground sensing system in modern aircraft?", "ansGr": [ { "ans": [ "To determine if the aircraft is in the air or on the ground.", "true" ] }, { "ans": [ "To monitor the cabin temperature.", "false" ] }, { "ans": [ "To provide entertainment to passengers.", "false" ] } ] }, { "ch": "Which system in an aircraft uses air-ground status information to control the electrical power distribution?", "ansGr": [ { "ans": [ "Air-ground relays.", "true" ] }, { "ans": [ "Cabin Temperature Controllers (CTC).", "false" ] }, { "ans": [ "Passenger Address/Cabin Interphone (PA/CI).", "false" ] } ] }, { "ch": "What happens when the gear beam structure bends under the weight of the aircraft?", "ansGr": [ { "ans": [ "The WOW load sensors send a signal to the WOW cards for processing.", "true" ] }, { "ans": [ "The autopilot system disengages.", "false" ] }, { "ans": [ "The backup generator converter activates.", "false" ] } ] }, { "ch": "Why are electrostatic precautions necessary when handling WOW cards?", "ansGr": [ { "ans": [ "Because WOW cards are electrostatic sensitive.", "true" ] }, { "ans": [ "Because they control cabin pressure.", "false" ] }, { "ans": [ "Because they monitor the fuel level.", "false" ] } ] }, { "ch": "What is a significant advantage of using load sensors instead of proximity switches for air-ground sensing?", "ansGr": [ { "ans": [ "Load sensors can capture the weight of the aircraft when on the ground.", "true" ] }, { "ans": [ "Proximity switches are more durable than load sensors.", "false" ] }, { "ans": [ "Proximity switches are easier to maintain.", "false" ] } ] }, { "ch": "How do WOW load sensors measure the strain on the landing gear beam?", "ansGr": [ { "ans": [ "By measuring the change in distance between sensor parts as the gear beam bends.", "true" ] }, { "ans": [ "By detecting the temperature of the landing gear beam.", "false" ] }, { "ans": [ "By measuring the vibration levels of the gear.", "false" ] } ] }, { "ch": "What must be done when replacing a WOW sensor to ensure proper operation?", "ansGr": [ { "ans": [ "The sensor must be calibrated.", "true" ] }, { "ans": [ "The landing gear must be replaced.", "false" ] }, { "ans": [ "The autopilot system must be tested.", "false" ] } ] }, { "ch": "Which statement best describes how the WOW (Weight on Wheels) system provides information to other aircraft systems?", "ansGr": [ { "ans": [ "WOW sensors send analog signals to WOW cards, which convert them to digital for system-wide communication.", "true" ] }, { "ans": [ "WOW cards send analog signals directly to avionics systems.", "false" ] }, { "ans": [ "WOW sensors generate digital signals that are sent via a fiber optic bus.", "false" ] } ] }, { "ch": "What must be done if a WOW card is replaced during maintenance?", "ansGr": [ { "ans": [ "All associated strain load sensors must be recalibrated.", "true" ] }, { "ans": [ "Adjust the landing gear mechanical stops.", "false" ] }, { "ans": [ "Only verify data bus connectivity.", "false" ] } ] }, { "ch": "Which best describes the type of sensor used for air-ground sensing in modern aircraft?", "ansGr": [ { "ans": [ "Variable reluctance strain measurement device", "true" ] }, { "ans": [ "Magneto-resistive proximity sensor", "false" ] }, { "ans": [ "Linear proximity switch", "false" ] } ] }, { "ch": "Why do modern airliners prefer strain gauge load sensors over traditional squat switches?", "ansGr": [ { "ans": [ "They allow precise detection of aircraft weight on wheels and better system integration.", "true" ] }, { "ans": [ "They reduce hydraulic pressure on landing", "false" ] }, { "ans": [ "They are easier to replace.", "false" ] } ] }, { "ch": "What is the primary mechanical principle used by load sensors in air-ground sensing systems?", "ansGr": [ { "ans": [ "Bending of the gear beam alters the distance between sensor parts", "true" ] }, { "ans": [ "Mechanical contact switches detect shock loads on landing", "false" ] }, { "ans": [ "Changes in hydraulic pressure detected through diaphragm sensors", "false" ] } ] }, { "ch": "Which of the following systems does NOT rely directly on air-ground sensing data?", "ansGr": [ { "ans": [ "Engine Oil Pressure Transmitter", "true" ] }, { "ans": [ "Electrical Load Management System (ELMS)", "false" ] }, { "ans": [ "Flap Slat Electronic Unit (FSEU)", "false" ] } ] }, { "ch": "What type of signal do the strain gauge sensors initially generate in an air-ground sensing system?", "ansGr": [ { "ans": [ "Analog electrical signal", "true" ] }, { "ans": [ "Direct digital output", "false" ] }, { "ans": [ "Pulse-width modulated (PWM) signal", "false" ] } ] }, { "ch": "The WOW load sensors used in modern aircraft are composed of:", "ansGr": [ { "ans": [ "Two parts: one coil assembly and one magnetic target", "true" ] }, { "ans": [ "One hydraulic sensor and one proximity switch", "false" ] }, { "ans": [ "One sensor with an LED emitter and optical receiver", "false" ] } ] }, { "ch": "Where can the status of the air-ground system be monitored and tested on modern aircraft?", "ansGr": [ { "ans": [ "On the landing gear maintenance page within the aircraft information management system", "true" ] }, { "ans": [ "On the engine status panel of the overhead console", "false" ] }, { "ans": [ "On the EICAS fault summary page", "false" ] } ] }, { "ch": "What is the main benefit of using load sensors over squat switches for air-ground sensing?", "ansGr": [ { "ans": [ "They provide weight and contact status", "true" ] }, { "ans": [ "They replace the landing gear functions", "false" ] }, { "ans": [ "They allow mechanical backup sensing", "false" ] } ] }, { "ch": "How do the load sensors detect ground contact?", "ansGr": [ { "ans": [ "Varying distance between parts changes the signal", "true" ] }, { "ans": [ "They trigger a digital switch", "false" ] }, { "ans": [ "They activate hydraulic pressure sensors", "false" ] } ] }, { "ch": "Which unit receives the analog signal from load sensors?", "ansGr": [ { "ans": [ "WOW card", "true" ] }, { "ans": [ "FQIS", "false" ] }, { "ans": [ "BPCU", "false" ] } ] }, { "ch": "What is required when replacing a WOW card?", "ansGr": [ { "ans": [ "Sensor calibration", "true" ] }, { "ans": [ "Pressure test", "false" ] }, { "ans": [ "Reset circuit breaker", "false" ] } ] }, { "ch": "What safety precaution is necessary when handling WOW cards?", "ansGr": [ { "ans": [ "ESD protection", "true" ] }, { "ans": [ "Wear safety boots", "false" ] }, { "ans": [ "Lower the landing gear", "false" ] } ] }, { "ch": "What type of signal is sent from the load sensor to the WOW card?", "ansGr": [ { "ans": [ "Analog", "true" ] }, { "ans": [ "Digital", "false" ] }, { "ans": [ "Binary", "false" ] } ] }, { "ch": "Where can technicians test air-ground sensing modes?", "ansGr": [ { "ans": [ "AIMS maintenance page", "true" ] }, { "ans": [ "Main circuit breaker panel", "false" ] }, { "ans": [ "Flap control unit", "false" ] } ] }, { "ch": "Which of the following best explains why a shock-absorbing tail skid is preferable on large transport aircraft?", "ansGr": [ { "ans": [ "It reduces structural damage by absorbing impact forces during a tail strike", "true" ] }, { "ans": [ "It prevents tail strikes by limiting pitch movement", "false" ] }, { "ans": [ "It improves take-off performance by reducing tail drag", "false" ] } ] }, { "ch": "A tail strike occurs during landing on a long-fuselage aircraft. Which factor most likely contributed to the incident?", "ansGr": [ { "ans": [ "Late and aggressive flare by the flight crew", "true" ] }, { "ans": [ "Excessive nose-down trim during final approach", "false" ] }, { "ans": [ "Early deployment of speed brakes", "false" ] } ] }, { "ch": "What is the primary difference between a rigid tail skid and a shock-absorbing skid?", "ansGr": [ { "ans": [ "Shock-absorbing skids contain mechanisms that dissipate impact energy", "true" ] }, { "ans": [ "Rigid skids automatically retract during take-off", "false" ] }, { "ans": [ "Rigid skids are made of flexible materials to absorb energy", "false" ] } ] }, { "ch": "Which operational practice helps minimize the risk of tail strike during take-off?", "ansGr": [ { "ans": [ "Gradually increasing pitch during rotation", "true" ] }, { "ans": [ "Using maximum elevator input at once", "false" ] }, { "ans": [ "Rotating the nose rapidly once V1 is reached", "false" ] } ] }, { "ch": "Why is a retractable tail skid used in some specialized aircraft?", "ansGr": [ { "ans": [ "It reduces drag during flight and extends only when needed", "true" ] }, { "ans": [ "It acts as a secondary landing gear", "false" ] }, { "ans": [ "It allows for higher energy absorption during landing", "false" ] } ] }, { "ch": "What is the main operational difference between the ATR72 tail bumper and the B787 tail skid?", "ansGr": [ { "ans": [ "The ATR72 bumper is fixed, while the B787 tail skid includes energy absorption and indication systems", "true" ] }, { "ans": [ "Both are retractable systems with active energy absorption", "false" ] }, { "ans": [ "The ATR72 bumper retracts during flight while the B787 tail skid is fixed", "false" ] } ] }, { "ch": "In the B787, how is a tail strike electronically detected and reported?", "ansGr": [ { "ans": [ "RDC detects wire break continuity and sends messages to EICAS via CCS", "true" ] }, { "ans": [ "The proximity sensors activate the braking system", "false" ] }, { "ans": [ "The tail skid sends a signal directly to the flight data recorder", "false" ] } ] }, { "ch": "What must be done after a suspected tail strike on an ATR72?", "ansGr": [ { "ans": [ "Perform a detailed inspection of the tail bumper and lower fuselage skin", "true" ] }, { "ans": [ "Replace the tail bumper immediately", "false" ] }, { "ans": [ "Reset the proximity sensor circuit", "false" ] } ] }, { "ch": "Where is the tail strike module typically located on a B787?", "ansGr": [ { "ans": [ "On the aft bottom fuselage, forward of the aft pressure bulkhead", "true" ] }, { "ans": [ "Inside the landing gear bay", "false" ] }, { "ans": [ "On the upper rear fuselage", "false" ] } ] }, { "ch": "What happens when both wire loops in the B787 tail strike module show continuity breaks?", "ansGr": [ { "ans": [ "A tail strike caution message appears on EICAS", "true" ] }, { "ans": [ "The tail skid automatically retracts", "false" ] }, { "ans": [ "A tail strike status message is displayed", "false" ] } ] }, { "ch": "When a tail strike is suspected, what is the most appropriate maintenance action?", "ansGr": [ { "ans": [ "Conduct visual inspection and follow AMM ATA 32 procedures", "true" ] }, { "ans": [ "Replace the horizontal stabilizer immediately", "false" ] }, { "ans": [ "Perform engine ground run and monitor tail temperature", "false" ] } ] }, { "ch": "Which of the following components may require replacement after a tail strike on some aircraft types?", "ansGr": [ { "ans": [ "Crushable cartridge or skid shoe", "true" ] }, { "ans": [ "Rudder trim actuator", "false" ] }, { "ans": [ "Fuel pressure regulator", "false" ] } ] }, { "part": "M11.13 ATA 32", "ch": "What are common examples of aircraft exterior lights?", "ansGr": [ { "ans": [ "Position, anti-collision, landing, and taxi lights", "true" ] }, { "ans": [ "Cabin lights and reading lights", "false" ] }, { "ans": [ "Navigation lights and instrument lights", "false" ] } ] }, { "ch": "What is the main purpose of position lights on an aircraft?", "ansGr": [ { "ans": [ "To indicate the aircraft's position", "true" ] }, { "ans": [ "To illuminate the runway", "false" ] }, { "ans": [ "To help passengers find their seats", "false" ] } ] }, { "ch": "Which exterior light is primarily used during landing and takeoff?", "ansGr": [ { "ans": [ "Landing light", "true" ] }, { "ans": [ "Anti-collision light", "false" ] }, { "ans": [ "Wing inspection light", "false" ] } ] }, { "ch": "How are the circuits for cargo compartment lights protected?", "ansGr": [ { "ans": [ "Circuit breakers", "true" ] }, { "ans": [ "Fuses", "false" ] }, { "ans": [ "Ground wires", "false" ] } ] }, { "ch": "Where are lighting strips and exit lights located in an aircraft?", "ansGr": [ { "ans": [ "In the floor and at exit points", "true" ] }, { "ans": [ "On the overhead bins", "false" ] }, { "ans": [ "In the cockpit", "false" ] } ] }, { "ch": "What areas do emergency lights illuminate during an emergency evacuation?", "ansGr": [ { "ans": [ "The over-wing area at emergency exits and on the escape slides", "true" ] }, { "ans": [ "The wings and tail section", "false" ] }, { "ans": [ "The cockpit and the loading area section", "false" ] } ] }, { "ch": "What happens to most emergency lights during a total electrical failure?", "ansGr": [ { "ans": [ "They revert to dedicated batteries", "true" ] }, { "ans": [ "They increase in brightness", "false" ] }, { "ans": [ "They shut down", "false" ] } ] }, { "ch": "What type of batteries are commonly used in emergency EXIT/area lights?", "ansGr": [ { "ans": [ "NiCad batteries", "true" ] }, { "ans": [ "Lead-acid batteries", "false" ] }, { "ans": [ "Lithium-ion batteries", "false" ] } ] }, { "ch": "Where are anti-collision lights usually installed on an aircraft?", "ansGr": [ { "ans": [ "On top of the fuselage or tail", "true" ] }, { "ans": [ "On the wings", "false" ] }, { "ans": [ "On the landing gear", "false" ] } ] }, { "ch": "Which type of anti- collision light produces an extremely bright intermittent flash of white light?", "ansGr": [ { "ans": [ "Strobe light", "true" ] }, { "ans": [ "Incandescent light", "false" ] }, { "ans": [ "Halogen light", "false" ] } ] }, { "ch": "How is the light produced in a strobe light?", "ansGr": [ { "ans": [ "By a high voltage discharge in a sealed xenon-filled tube", "true" ] }, { "ans": [ "By heating a filament", "false" ] }, { "ans": [ "By using a solar panel", "false" ] } ] }, { "ch": "What type of light do strobe lights produce?", "ansGr": [ { "ans": [ "An extremely bright intermittent flash of white light", "true" ] }, { "ans": [ "A continuous beam of red light", "false" ] }, { "ans": [ "A continuous beam of blue light", "false" ] } ] }, { "ch": "What component supplies voltage to the sealed xenon-filled tube in a strobe light?", "ansGr": [ { "ans": [ "A dedicated power pack", "true" ] }, { "ans": [ "A battery", "false" ] }, { "ans": [ "A manual switch", "false" ] } ] }, { "ch": "A set of position lights consist of ?", "ansGr": [ { "ans": [ "One red, one green, and one white light", "true" ] }, { "ans": [ "One red, one blue, and one white light", "false" ] }, { "ans": [ "One red, one green, and one blue light", "false" ] } ] }, { "ch": "How are wingtip clearance lights controlled on some aircraft?", "ansGr": [ { "ans": [ "By the same circuitry as the taxi lights", "true" ] }, { "ans": [ "By the independent circuitry with the taxi lights", "false" ] }, { "ans": [ "By operate wingtip lights switch", "false" ] } ] }, { "ch": "Which additional lights might supplement dual taxi lights on some aircraft?", "ansGr": [ { "ans": [ "Wingtip clearance lights", "true" ] }, { "ans": [ "Tail lights", "false" ] }, { "ans": [ "Strobe lights", "false" ] } ] }, { "ch": "What is the purpose of a dimming resistor in the landing light circuit of some aircraft?", "ansGr": [ { "ans": [ "To provide reduced illumination for taxiing", "true" ] }, { "ans": [ "To increase power consumption", "false" ] }, { "ans": [ "To change the color of the light", "false" ] } ] }, { "ch": "How can the landing lights be reduced illumination for taxiing ?", "ansGr": [ { "ans": [ "By a dimming resistor", "true" ] }, { "ans": [ "By decrease the voltage supply", "false" ] }, { "ans": [ "By using dimming protector", "false" ] } ] }, { "ch": "Where can crews control passenger cabin lights ?", "ansGr": [ { "ans": [ "Interface panels", "true" ] }, { "ans": [ "Cabin lights control panel in the cockpit", "false" ] }, { "ans": [ "Passenger lights control panel in the cockpit", "false" ] } ] }, { "ch": "What area does the door sill light illuminate?", "ansGr": [ { "ans": [ "Outside the cargo compartment", "true" ] }, { "ans": [ "Inside the cargo compartment", "false" ] }, { "ans": [ "Cargo loading control panel area", "false" ] } ] }, { "ch": "What voltage is used for fluorescent lights on Boeing aircraft?", "ansGr": [ { "ans": [ "115 VAC", "true" ] }, { "ans": [ "220 VAC", "false" ] }, { "ans": [ "28 VAC", "false" ] } ] }, { "ch": "What component is responsible for providing the high voltage for strobe lights?", "ansGr": [ { "ans": [ "A capacitor", "true" ] }, { "ans": [ "A transformer", "false" ] }, { "ans": [ "A high voltage protector", "false" ] } ] }, { "ch": "How are certain emergency lights automatically switched in case of partial electrical failure?", "ansGr": [ { "ans": [ "By switching to the hot DC battery bus", "true" ] }, { "ans": [ "By switching to the AC bus", "false" ] }, { "ans": [ "By using a remote control", "false" ] } ] }, { "ch": "What is the role of solid-state switching logic in emergency EXIT/area lights?", "ansGr": [ { "ans": [ "To manage the switching and battery charging processes", "true" ] }, { "ans": [ "To enhance illumination intensity", "false" ] }, { "ans": [ "To adjust the light color", "false" ] } ] } ]