[ { "part": "M13.14 ATA 29", "ch": "What kind of pump using in the hyd power pack?", "ansGr": [ { "ans": [ "An electrical pump", "true" ] }, { "ans": [ "A pneumatic pump", "false" ] }, { "ans": [ "A vane pump", "false" ] } ] }, { "ch": "MIL-H-5606 is", "ansGr": [ { "ans": [ "The mineral oil-based", "true" ] }, { "ans": [ "The polyalphaolefin", "false" ] }, { "ans": [ "The phosphate ester", "false" ] } ] }, { "ch": "Which is an open-center system?", "ansGr": [ { "ans": [ "is one way having fluid flow without pressure in the system", "true" ] }, { "ans": [ "is one way having fluid flow with pressure in the system", "false" ] }, { "ans": [ "is both way having fluid flow without pressure in the system", "false" ] } ] }, { "ch": "Which is the difference between the open-center system and closed-center system?", "ansGr": [ { "ans": [ "The method to arrange the selector control valves", "true" ] }, { "ans": [ "The pressure value on pump's outlet is different", "false" ] }, { "ans": [ "The type of the selector valves are different", "false" ] } ] }, { "ch": "How the selector valves are arranged in the closed-center system?", "ansGr": [ { "ans": [ "In parallel", "true" ] }, { "ans": [ "In series", "false" ] }, { "ans": [ "in mix", "false" ] } ] }, { "ch": "How the selector valves are arranged in the opened-center system?", "ansGr": [ { "ans": [ "In series", "true" ] }, { "ans": [ "in mix", "false" ] }, { "ans": [ "In parallel", "false" ] } ] }, { "ch": "Which is the advantage of the hydraulic power pack system?", "ansGr": [ { "ans": [ "Reduces the weight", "true" ] }, { "ans": [ "No need hydraulic fluid", "false" ] }, { "ans": [ "Increases the pressure value", "false" ] } ] }, { "ch": "How many principal categories of the hydraulic fluids?", "ansGr": [ { "ans": [ "Three", "true" ] }, { "ans": [ "Four", "false" ] }, { "ans": [ "Two", "false" ] } ] }, { "ch": "Which type fluid has purple color?", "ansGr": [ { "ans": [ "Phosphate esters", "true" ] }, { "ans": [ "Minerals", "false" ] }, { "ans": [ "Polyalphaolefins", "false" ] } ] }, { "ch": "Which is the disadvantage of the Skydrol with Human's health?", "ansGr": [ { "ans": [ "dermatitis or even secondary infection from bacteria", "true" ] }, { "ans": [ "cause headache, nausea.", "false" ] }, { "ans": [ "cause difficulty breathing.", "false" ] } ] }, { "ch": "Which component to keep the fluid avoiding vortexing and surging?", "ansGr": [ { "ans": [ "Baffles", "true" ] }, { "ans": [ "Strainers", "false" ] }, { "ans": [ "Stand-pipe", "false" ] } ] }, { "ch": "Which shape for the non-pressurized reservoirs?", "ansGr": [ { "ans": [ "Cylindrical", "true" ] }, { "ans": [ "Rectangle", "false" ] }, { "ans": [ "Lozenge", "false" ] } ] }, { "ch": "Which component to dampen pressure surges in the hydraulic system?", "ansGr": [ { "ans": [ "The accummulator", "true" ] }, { "ans": [ "Pressure regulator valve", "false" ] }, { "ans": [ "Bafles in reservoir", "false" ] } ] }, { "ch": "Which component to create energy in hydraulic system?", "ansGr": [ { "ans": [ "The Pump", "true" ] }, { "ans": [ "The valve", "false" ] }, { "ans": [ "The actuator", "false" ] } ] }, { "ch": "Which component to change the pressure value in hydraulic system?", "ansGr": [ { "ans": [ "The hydraulic valve", "true" ] }, { "ans": [ "The Actuator", "false" ] }, { "ans": [ "The Accummulator", "false" ] } ] }, { "ch": "Which component to control the power distribution?", "ansGr": [ { "ans": [ "The flow control valve", "true" ] }, { "ans": [ "The accummulator", "false" ] }, { "ans": [ "The over pressure valve", "false" ] } ] }, { "ch": "Which component to transform energy in the form of fluid pressure into mechanical force?", "ansGr": [ { "ans": [ "A hydraulic actuator", "true" ] }, { "ans": [ "The hydraulic pump", "false" ] }, { "ans": [ "The hydraulic valve", "false" ] } ] }, { "ch": "How can display all hydraulic paremeters in monitoring Screen?", "ansGr": [ { "ans": [ "By convert the analog signal to digital signal", "true" ] }, { "ans": [ "By transform the analog signal to the monitoring screen", "false" ] }, { "ans": [ "By transmit the digital signal from these components to the screen", "false" ] } ] }, { "ch": "What is the purpose of the hydraulic hand pump?", "ansGr": [ { "ans": [ "Its purpose is for testing and used in emergency case", "true" ] }, { "ans": [ "Operates as conventional type of the main hydraulic power source", "false" ] }, { "ans": [ "Operates parallel with main hydraulic power sources", "false" ] } ] }, { "ch": "Which is the secondary source of hydraualic pressure generation on most aircraft?", "ansGr": [ { "ans": [ "Electrical pump", "true" ] }, { "ans": [ "Mechanically driven pump", "false" ] }, { "ans": [ "Hand pump", "false" ] } ] }, { "ch": "Where are the mechanically driven pumps mounted in aircraft in basically?", "ansGr": [ { "ans": [ "They are mounted on the accessory gearbox of the main engines", "true" ] }, { "ans": [ "They are mounted on the pylon of the main engines", "false" ] }, { "ans": [ "They are mounted on the hydraulic bay in the fuselage of aircraft", "false" ] } ] }, { "ch": "Where are the ellectrically driven pumps mounted in aircraft in basically?", "ansGr": [ { "ans": [ "They are mounted on the hydraulic bay in the fuselage of aircraft", "true" ] }, { "ans": [ "They are mounted on the accessory gearbox of the main engines", "false" ] }, { "ans": [ "They are mounted on the pylon of the main engines", "false" ] } ] }, { "ch": "Electrically driven pumps are installed for use in case of", "ansGr": [ { "ans": [ "Emergencies or during ground operation when engines are not running", "true" ] }, { "ans": [ "For backup on ground operation when apu is not running", "false" ] }, { "ans": [ "in case of aircraft needs more hydraulic power during aircraft takeoff or landing", "false" ] } ] }, { "ch": "Pneumatically driven pumps are driven by", "ansGr": [ { "ans": [ "Air from the pneumatic system or by ram air in the case of a ram air turbine (RAT).", "true" ] }, { "ans": [ "Air from hot secction of enignes or by ram air inlet of airconditioning system", "false" ] }, { "ans": [ "Air from APU bleed directlly or by ram air inlet of airconditioning system", "false" ] } ] }, { "ch": "Non-pressurized reservoirs are used in aircraft that", "ansGr": [ { "ans": [ "Are not designed for violent maneuvers, do not fly at high altitudes", "true" ] }, { "ans": [ "Are designed for violent maneuvers, fly at high altitudes", "false" ] }, { "ans": [ "Are designed for flying fast and high altitudes, more maneuvers", "false" ] } ] }, { "ch": "Most non-pressurized reservoirs are constructed in", "ansGr": [ { "ans": [ "A cylindrical shape", "true" ] }, { "ans": [ "A rectangular shape", "false" ] }, { "ans": [ "A cube shape", "false" ] } ] }, { "ch": "Pressurized reservoirs are used in aircraft that", "ansGr": [ { "ans": [ "Are designed for violent maneuvers, fly at high altitudes", "true" ] }, { "ans": [ "Are not designed for violent maneuvers, do not fly at high altitudes", "false" ] }, { "ans": [ "Are designed for flying slowly and low altitudes, not maneuvers", "false" ] } ] }, { "ch": "Hand pumps are normally single cylinder double acting because of the", "ansGr": [ { "ans": [ "Two NRVS fitted", "true" ] }, { "ans": [ "Relief valve", "false" ] }, { "ans": [ "Piston ram displacement", "false" ] } ] }, { "ch": "What is the purpose of the hydraulic hand pump?", "ansGr": [ { "ans": [ "Its purpose is for testing and used in emergency case", "true" ] }, { "ans": [ "Operates as conventional type of the main hydraulic power source", "false" ] }, { "ans": [ "Operates parallel with main hydraulic power sources", "false" ] } ] }, { "ch": "How many types of the hand pumps?", "ansGr": [ { "ans": [ "Three types, they are single action, double action and rotary.", "true" ] }, { "ans": [ "Two type, they are single stroke and double stroke.", "false" ] }, { "ans": [ "Only one type, it is a multi function unit.", "false" ] } ] }, { "ch": "Which type of the pump be used in a hydraulic power pack?", "ansGr": [ { "ans": [ "The electric pump", "true" ] }, { "ans": [ "The driven pump", "false" ] }, { "ans": [ "The hand pump", "false" ] } ] }, { "ch": "How the hydraulic power pack works?", "ansGr": [ { "ans": [ "By an electric motor", "true" ] }, { "ans": [ "By a pneumatic air", "false" ] }, { "ans": [ "By the hydraulic muscle", "false" ] } ] }, { "ch": "How the modern aircraft controls the control surfaces?", "ansGr": [ { "ans": [ "By an electrically controlled system", "true" ] }, { "ans": [ "By the cables", "false" ] }, { "ans": [ "By the control rods", "false" ] } ] }, { "ch": "How can use the correct type of the fluid for servicing?", "ansGr": [ { "ans": [ "Refer Aircraft Maintenance Manual", "true" ] }, { "ans": [ "Listen request from the Leader", "false" ] }, { "ans": [ "Remember kind of the fluid by ownself", "false" ] } ] }, { "ch": "How to pressurize the hydraulic reservoir?", "ansGr": [ { "ans": [ "By bleed air", "true" ] }, { "ans": [ "By ambient air", "false" ] }, { "ans": [ "By suction air", "false" ] } ] }, { "ch": "Which type of the reservoir be used for the high altitude flight?", "ansGr": [ { "ans": [ "The pressurized reservoir", "true" ] }, { "ans": [ "The non-pressurized reservoir", "false" ] }, { "ans": [ "The negative pressure reservoir", "false" ] } ] }, { "ch": "Which component to keep the pressure in system in case the main pressure system fail?", "ansGr": [ { "ans": [ "The accummulator", "true" ] }, { "ans": [ "The check valve", "false" ] }, { "ans": [ "The high pressure valve", "false" ] } ] }, { "ch": "Which pump are the primary source of pressure generation on most aircraft?", "ansGr": [ { "ans": [ "The mechanically driven pump", "true" ] }, { "ans": [ "The electrical motor driven pump", "false" ] }, { "ans": [ "The pneumatic driven pump", "false" ] } ] }, { "ch": "Which component is the last source supply to hydraulic system?", "ansGr": [ { "ans": [ "Ramp Air Turbine (RAT)", "true" ] }, { "ans": [ "The electric motor", "false" ] }, { "ans": [ "The pneumatic pump", "false" ] } ] }, { "ch": "Which is the purpose of the hand pump?", "ansGr": [ { "ans": [ "To operate the cargo door", "true" ] }, { "ans": [ "To recovery the hydraulic system in flight", "false" ] }, { "ans": [ "To operate the flight control on ground", "false" ] } ] }, { "ch": "Which component supply the power to other hydraulic system in case one hydraulic system fail??", "ansGr": [ { "ans": [ "Power Transfer Unit", "true" ] }, { "ans": [ "Engine driven pump", "false" ] }, { "ans": [ "APU driven pump", "false" ] } ] }, { "ch": "Which component protects the system from exceeding a set pressure?", "ansGr": [ { "ans": [ "The pressure relief valve", "true" ] }, { "ans": [ "The pressure regulator valve", "false" ] }, { "ans": [ "The shutoff valve", "false" ] } ] }, { "ch": "A constant-displacement pump", "ansGr": [ { "ans": [ "It delivers a fixed quantity of fluid per revolution, regardless of the pressure demands", "true" ] }, { "ans": [ "It delivers a changeable quantity of fluid per revolution, regardless of the pressure demands", "false" ] }, { "ans": [ "It delivers a total quantity of fluid per revolution, regardless of the pressure demands", "false" ] } ] }, { "ch": "The vane type power pump is", "ansGr": [ { "ans": [ "A constant displacement pump", "true" ] }, { "ans": [ "A variable displacement pump", "false" ] }, { "ans": [ "A changeable displacement pump", "false" ] } ] }, { "ch": "Which energy source use for RAT operates?", "ansGr": [ { "ans": [ "Ramp air", "true" ] }, { "ans": [ "Bleed air", "false" ] }, { "ans": [ "Mechanical driver", "false" ] } ] }, { "ch": "How can release RAT during flight?", "ansGr": [ { "ans": [ "Manual from cockpit or automatic", "true" ] }, { "ans": [ "Manual from hydraulic bay or automatic", "false" ] }, { "ans": [ "Manual from cockpit or hydraulic bay", "false" ] } ] }, { "ch": "A gear type power pump is", "ansGr": [ { "ans": [ "A constant displacement pump", "true" ] }, { "ans": [ "A changeable displacement pump", "false" ] }, { "ans": [ "A non-constant displacement pump", "false" ] } ] }, { "ch": "A gerotor type power pump consists essentially of", "ansGr": [ { "ans": [ "A housing containing an eccentric-shaped stationary liner, an internal gear rotor having seven wide teeth of short height, a spur driving gear having six narrow teeth, and a pump cover that contains two crescent-shaped openings", "true" ] }, { "ans": [ "Two meshed gears that revolve in a housing, the driving gear is driven by the aircraft engine or some other power unit. The driven gear meshes with, and is driven by, the driving gear", "false" ] }, { "ans": [ "A housing containing four vanes (blades), a hollow steel rotor with slots for the vanes, and a coupling to turn the rotor which is positioned off center within the sleeve", "false" ] } ] }, { "ch": "During the first half of a revolution, the volume gradually", "ansGr": [ { "ans": [ "Increases from minimum to maximum", "true" ] }, { "ans": [ "Decreases from maximum to minimum", "false" ] }, { "ans": [ "Keeps the same", "false" ] } ] }, { "ch": "During the second half of a revolution, the volume gradually", "ansGr": [ { "ans": [ "Decreases from maximum to minimum", "true" ] }, { "ans": [ "Keeps the same", "false" ] }, { "ans": [ "Increases from minimum to maximum", "false" ] } ] }, { "ch": "What is the Power Transfer Unit (PTU)?", "ansGr": [ { "ans": [ "It has two units, a hydraulic pump and hydraulic motor, are connected via a single drive shaft", "true" ] }, { "ans": [ "It has two units, a hydraulic pump and electrical motor, are connected via a single drive shaft", "false" ] }, { "ans": [ "It has two units, a electrical pump and hydraulic motor, are connected via a single drive shaft", "false" ] } ] }, { "ch": "While the PTU transfers power,", "ansGr": [ { "ans": [ "It does not transfer any fluid from one system to the other", "true" ] }, { "ans": [ "It will transfer the fluid from one system to the other", "false" ] }, { "ans": [ "It does not transfer power from one system to the other", "false" ] } ] }, { "ch": "The purpose of a mechanical sequence valve is to ensure the operation of", "ansGr": [ { "ans": [ "Landing gear and doors", "true" ] }, { "ans": [ "Safety switches", "false" ] }, { "ans": [ "Brake anti-skid units", "false" ] } ] }, { "ch": "What is purpose of the hydraulic motor driven generator (HMDG)?", "ansGr": [ { "ans": [ "The HMDG provides an alternative source of electrical power", "true" ] }, { "ans": [ "The HMDG provides an alternative source of hydraulic power", "false" ] }, { "ans": [ "The HMDG provides an alternative source of mechanical power", "false" ] } ] }, { "ch": "A pressure relief valve is used to limit the amount of pressure being necessary to prevent", "ansGr": [ { "ans": [ "Failure of components or rupture of hydraulic lines under excessive pressures", "true" ] }, { "ans": [ "Failure of tanks or rupture of hydraulic return lines under excessive pressures", "false" ] }, { "ans": [ "Failure of pumps or change the diameter of hydraulic lines under excessive pressures", "false" ] } ] }, { "ch": "One purpose of the pressure regulator is to manage the output of the pump to maintain", "ansGr": [ { "ans": [ "System operating pressure within a predetermined range", "true" ] }, { "ans": [ "The pressure in system for the pumps working normal", "false" ] }, { "ans": [ "Enough quantity of fluid in the hydraulic system", "false" ] } ] }, { "ch": "Which is the purpose of the regulator valve at times when pressure in the system is within normal operating range", "ansGr": [ { "ans": [ "Permit the pump to turn without resistance", "true" ] }, { "ans": [ "Permit the pump to turn fast to increase pressure", "false" ] }, { "ans": [ "Permit the pump to turn slowly to reduce pressure", "false" ] } ] }, { "ch": "Pressure reducing valves are used in hydraulic systems where it", "ansGr": [ { "ans": [ "Is necessary to lower the normal system operating pressure by a specified amount", "true" ] }, { "ans": [ "Is necessary to increase the normal system operating pressure by a specified amount", "false" ] }, { "ans": [ "Is necessary to keep the normal system operating pressure by a specified amount", "false" ] } ] }, { "ch": "A shutoff valve may be used to create", "ansGr": [ { "ans": [ "A priority in a hydraulic system", "true" ] }, { "ans": [ "A pressure in a hydraulic system", "false" ] }, { "ans": [ "A frequently in a hydraulic system", "false" ] } ] }, { "ch": "Which is the purpose of a pressure switch to control the shutoff valve?", "ansGr": [ { "ans": [ "The switch is adjusted so that if pressure drops below the set point, the valve closes", "true" ] }, { "ans": [ "The switch is adjusted so that if pressure drops below the set point, the valve opens", "false" ] }, { "ans": [ "The switch is adjusted so that if pressure increases to the set point, the valve closes", "false" ] } ] }, { "ch": "Most selector valves are mechanically controlled", "ansGr": [ { "ans": [ "By a lever or electrically controlled by solenoid", "true" ] }, { "ans": [ "By a pressure or pneumatic air", "false" ] }, { "ans": [ "By a wheel or electrically controlled by on off switch", "false" ] } ] }, { "ch": "How can install correct the direction of check valve?", "ansGr": [ { "ans": [ "An arrow on the outside of the housing", "true" ] }, { "ans": [ "The bigger port is line in", "false" ] }, { "ans": [ "The bigger port is line out", "false" ] } ] }, { "ch": "Basiclly, inside a check valve has a ball and", "ansGr": [ { "ans": [ "The spring", "true" ] }, { "ans": [ "The needle", "false" ] }, { "ans": [ "The flapper", "false" ] } ] }, { "ch": "A shuttle valve is used for", "ansGr": [ { "ans": [ "Change over from main to auxiliary system in the case of failure.", "true" ] }, { "ans": [ "Preventing fluid loss from a leaking jack", "false" ] }, { "ans": [ "Maintaining fluid press when the emergency system fails", "false" ] } ] }, { "ch": "The pressure of the priority valve is set for 2200 psi, if the pressure drops below 2200 psi, the priority valve", "ansGr": [ { "ans": [ "Closes and no fluid pressure flows to the non-critical systems.", "true" ] }, { "ans": [ "Opens to allow fluid pressure flows to the non-critical systems.", "false" ] }, { "ans": [ "Opens to allow fluid pressure flows to the critical systems.", "false" ] } ] }, { "ch": "What is the main purpose of the shuttle valve?", "ansGr": [ { "ans": [ "Is to isolate the normal system from an alternate or emergency system", "true" ] }, { "ans": [ "Is to isolate the emergency system from an alternate or normal system", "false" ] }, { "ans": [ "Is to connect the normal system from an alternate or emergency system", "false" ] } ] }, { "ch": "In shuttle valves that are designed with a spring, the shuttle is normally held against ... inlet port by the spring", "ansGr": [ { "ans": [ "The alternate system", "true" ] }, { "ans": [ "The normal system", "false" ] }, { "ans": [ "The back-up system", "false" ] } ] }, { "ch": "Which type of valves are installed in hydraulic lines to prevent loss of fluid when units are removed", "ansGr": [ { "ans": [ "A quick disconnect valve", "true" ] }, { "ans": [ "A check valve", "false" ] }, { "ans": [ "A shutoff valve", "false" ] } ] }, { "ch": "Hydraulic fuse are", "ansGr": [ { "ans": [ "They detect a sudden increase in flow, such as a burst downstream, and shut off the fluid flow", "true" ] }, { "ans": [ "They detect a sudden increase pressure of main pumps and shut off the fluid flow", "false" ] }, { "ans": [ "They detect a sudden increase pressure of main pumps and opens the fluid flow", "false" ] } ] }, { "ch": "While the PTU transfers power, does it transfer any fluid from one system to the other?", "ansGr": [ { "ans": [ "No, it does not.", "true" ] }, { "ans": [ "Yes, it is.", "false" ] }, { "ans": [ "It transfers when pilot opens the shutoff valve.", "false" ] } ] }, { "ch": "What is the structure of PTU?", "ansGr": [ { "ans": [ "PTU consists of a hydraulic pump and hydraulic motor, are connected via a single drive shaft so that power can be transferred between two hydraulic systems", "true" ] }, { "ans": [ "PTU consists of two hydraulic pumps, are connected via a single drive shaft so that power can be transferred between two hydraulic systems", "false" ] }, { "ans": [ "PTU consists of two hydraulic motors, are connected via a single drive shaft so that power can be transferred between two hydraulic systems", "false" ] } ] }, { "ch": "How can protect the hydraulic piston pump from the foreign particles and contaminating substances?", "ansGr": [ { "ans": [ "The hydraulic filter", "true" ] }, { "ans": [ "The relief valve", "false" ] }, { "ans": [ "The shutoff valve", "false" ] } ] }, { "ch": "When the hydraulic filter is clogged", "ansGr": [ { "ans": [ "The bypass relieft valve opens", "true" ] }, { "ans": [ "The hydraulic system stop working", "false" ] }, { "ans": [ "It makes the hydraulic system broken", "false" ] } ] }, { "ch": "Modern design often uses a filter module that contains several filters and", "ansGr": [ { "ans": [ "Other components", "true" ] }, { "ans": [ "An motor", "false" ] }, { "ans": [ "A wheel", "false" ] } ] }, { "ch": "System pressure sensors are often located at", "ansGr": [ { "ans": [ "Pressure filter modules", "true" ] }, { "ans": [ "A pressure pump", "false" ] }, { "ans": [ "A suction line", "false" ] } ] }, { "ch": "Hydraulic system parameters that are captured in analog format are converted to", "ansGr": [ { "ans": [ "Digital format for use in the control system logic", "true" ] }, { "ans": [ "Other analog format for use in the control system logic", "false" ] }, { "ans": [ "Double analog format for use in the control system logic", "false" ] } ] }, { "part": "M13.15 ATA 30", "ch": "What is the clear ice?", "ansGr": [ { "ans": [ "Clear ice forms when the remaining liquid portion of the water drop flows out over the aircraft surface, gradually freezing as a smooth sheet of solid ice", "true" ] }, { "ans": [ "Clear ice forms when water drops are small, such as those in stratified clouds or light drizzle", "false" ] }, { "ans": [ "Clear ice forms when raining and temperature lower, immediatelly freezing into a large, thick sheet of ice.", "false" ] } ] }, { "ch": "What is the rime ice?", "ansGr": [ { "ans": [ "Rime ice forms when water drops are small, such as those in stratified clouds or light drizzle", "true" ] }, { "ans": [ "Clear ice forms when raining and temperature lower, immediatelly freezing into a large, thick sheet of ice.", "false" ] }, { "ans": [ "Clear ice forms when the remaining liquid portion of the water drop flows out over the aircraft surface, gradually freezing as a smooth sheet of solid ice", "false" ] } ] }, { "ch": "Which one more easily removed than other between rime ice and clear ice?", "ansGr": [ { "ans": [ "Rime ice", "true" ] }, { "ans": [ "Clear ice", "false" ] }, { "ans": [ "The same", "false" ] } ] }, { "ch": "Ice buildup", "ansGr": [ { "ans": [ "Increases drag and reduces lift", "true" ] }, { "ans": [ "Increases lift and reduces drag", "false" ] }, { "ans": [ "Increases both drag and lift", "false" ] } ] }, { "ch": "Ice can be detected by", "ansGr": [ { "ans": [ "Visual inspection and detector sensors", "true" ] }, { "ans": [ "Pilot's feeling and more fuel consumption", "false" ] }, { "ans": [ "Airplane flys lower and slower", "false" ] } ] }, { "ch": "Which warning sign to alert the flight crew when ice is detected in generally?", "ansGr": [ { "ans": [ "An annunciator light comes on", "true" ] }, { "ans": [ "A warning sound comes on", "false" ] }, { "ans": [ "Ice aprears on the windows", "false" ] } ] }, { "ch": "Can spray the de-ice fluid on the whole aircraft?", "ansGr": [ { "ans": [ "No, avoid engine inlets, probes and ports, air conditioning inlets, apu inlet", "true" ] }, { "ans": [ "Yes, it can spray the de-ice fluid on the whole aircraft", "false" ] }, { "ans": [ "Yes, it can spray the de-ice fluid on the whole aircraft except engine only", "false" ] } ] }, { "ch": "In de-energized mode, discharge air from the dry air pumps is dumped overboard through", "ansGr": [ { "ans": [ "The de-ice control valves", "true" ] }, { "ans": [ "The discharge valves", "false" ] }, { "ans": [ "The shuttle valves", "false" ] } ] }, { "ch": "Which componant is set to supply the optimum suction for the gyros, which is sufficient to hold the boots tightly against the airfoil surfaces.", "ansGr": [ { "ans": [ "The vacuum regulator", "true" ] }, { "ans": [ "The deflate valve", "false" ] }, { "ans": [ "The deice control valve", "false" ] } ] }, { "ch": "The gyroscopic instruments are also connected to the vacuum side of the", "ansGr": [ { "ans": [ "Dry air pump", "true" ] }, { "ans": [ "The deice control valve", "false" ] }, { "ans": [ "The vacuum regulator", "false" ] } ] }, { "ch": "Holdover Time (HOT) is ... that de- icing/anti-icing fluid prevents the formation of frost or ice and the accumulation of snow on the critical surfaces of an aircraft", "ansGr": [ { "ans": [ "The estimated time", "true" ] }, { "ans": [ "The real time", "false" ] }, { "ans": [ "The UTC time", "false" ] } ] }, { "ch": "What is the difference between a wet and dry type engine driven air pump?", "ansGr": [ { "ans": [ "Dry type enigne driven air pump not lubricated with engine oil", "true" ] }, { "ans": [ "Wet type engine driven air pump is inside oil tank and dry pump is not", "false" ] }, { "ans": [ "Wet type engine driven air pump does not need to lubricate", "false" ] } ] }, { "ch": "An oil separator is required for each", "ansGr": [ { "ans": [ "Wet type air pump", "true" ] }, { "ans": [ "Dry type air pump", "false" ] }, { "ans": [ "Both wet and dry pumps", "false" ] } ] }, { "ch": "De-ice boot system air pressure is controlled by a pressure regulator valve located", "ansGr": [ { "ans": [ "Somewhere in the system downstream of the pump", "true" ] }, { "ans": [ "Somewhere in the system upstream of the pump", "false" ] }, { "ans": [ "Somewhere in the vaccum system", "false" ] } ] }, { "ch": "How is the air supply to the de-ice boot system controlled by the flight crew?", "ansGr": [ { "ans": [ "With cockpit valves, regulators, and switches", "true" ] }, { "ans": [ "Through a dedicated de-icing Push Button Swicth", "false" ] }, { "ans": [ "Using automated digital temperature control", "false" ] } ] }, { "ch": "What happens if electric power is lost during de-ice boot operation?", "ansGr": [ { "ans": [ "Boots automatically deflate and stay retracted by vacuum", "true" ] }, { "ans": [ "Boots remain inflated until power is restored", "false" ] }, { "ans": [ "The system switches to standby pneumatic inflation", "false" ] } ] }, { "ch": "What sequence occurs after selecting a single-cycle boot operation?", "ansGr": [ { "ans": [ "Wing boots inflate for 6 seconds, then stabilizer boots inflate for 4 seconds", "true" ] }, { "ans": [ "All boots inflate simultaneously for 10 seconds", "false" ] }, { "ans": [ "Stabilizer boots inflate first, followed by wing boots for equal timing", "false" ] } ] }, { "ch": "What is the proper method for cleaning de-ice boots during scheduled aircraft washing?", "ansGr": [ { "ans": [ "Clean with soap and water; use naptha for grease removal", "true" ] }, { "ans": [ "Remove boots and soak them in an alcohol-based solution", "false" ] }, { "ans": [ "Use compressed air and a dry cloth to prevent water damage", "false" ] } ] }, { "ch": "During routine inspections, how should weather cracking on rubber de-ice boots be treated?", "ansGr": [ { "ans": [ "Apply conductive cement to seal and restore conductivity", "true" ] }, { "ans": [ "Apply a black silicone-based adhesive to seal the cracks", "false" ] }, { "ans": [ "Replace the boots and perform pressure decay testing", "false" ] } ] }, { "ch": "How should a technician adjust the pressure relief valve in a pneumatic de-ice system?", "ansGr": [ { "ans": [ "By adjusting the screw while observing the de-ice pressure gauge", "true" ] }, { "ans": [ "By manually inflating the boots and measuring internal volume", "false" ] }, { "ans": [ "By closing all bleed air valves and monitoring boot stiffness", "false" ] } ] }, { "ch": "What happens once the automatic propeller de-icing system is turned on?", "ansGr": [ { "ans": [ "The system cycles continuously through all elements in timed sequence", "true" ] }, { "ans": [ "The heating cycle starts once the outside air temperature drops below freezing", "false" ] }, { "ans": [ "The control unit checks boot resistance before energizing the system", "false" ] } ] }, { "ch": "Why are the heating elements of electric de-ice boots operated in paired sections?", "ansGr": [ { "ans": [ "To avoid aerodynamic imbalance during de-icing operations", "true" ] }, { "ans": [ "To alternate electric current to reduce thermal stress", "false" ] }, { "ans": [ "To provide uniform heating and minimize energy usage", "false" ] } ] }, { "ch": "Which type of air is typically used for windshield heating on small aircraft?", "ansGr": [ { "ans": [ "Warm air ducted from the cabin or heating system", "true" ] }, { "ans": [ "Ambient ram air collected through NACA ducts", "false" ] }, { "ans": [ "High-pressure compressor bleed air from engines", "false" ] } ] }, { "ch": "Why are pneumatic windshield heat systems not approved for flight into known icing conditions?", "ansGr": [ { "ans": [ "The heat they provide is insufficient for continuous anti-icing capability", "true" ] }, { "ans": [ "The systems lack automatic ice detection and self-regulation features", "false" ] }, { "ans": [ "These systems only operate when the aircraft is on the ground", "false" ] } ] }, { "ch": "EAI is automatic when the anti-ice switch is set to", "ansGr": [ { "ans": [ "AUTO", "true" ] }, { "ans": [ "Manual", "false" ] }, { "ans": [ "On", "false" ] } ] }, { "ch": "EAI indications and warnings are displayed on the flight deck", "ansGr": [ { "ans": [ "EICAS displays", "true" ] }, { "ans": [ "Engine page", "false" ] }, { "ans": [ "Pneumatic page", "false" ] } ] }, { "ch": "How can perform anti-ice for air data probes, such as pitot tubes, static air ports, TAT and AOA probes, ice detectors, and engine P2/T2 sensors", "ansGr": [ { "ans": [ "Use thermal electric anti-ice in those probes", "true" ] }, { "ans": [ "Use the hot air from high stage compressor", "false" ] }, { "ans": [ "Use the chemical to apply to surface of probes", "false" ] } ] }, { "ch": "Which are used to keep the windshield clear of ice, frost, and fog", "ansGr": [ { "ans": [ "The laminated construction facilitates the inclusion of electric heating elements into the glass layers", "true" ] }, { "ans": [ "The laminated construction facilitates the inclusion of warm air into the glass layers", "false" ] }, { "ans": [ "The laminated construction facilitates the inclusion of chemical fluid into the glass layers", "false" ] } ] }, { "ch": "Window heat anti-ice systems typically BITE test automatically, they are connected to an aircraft data bus for communication with", "ansGr": [ { "ans": [ "The aircraft information management system", "true" ] }, { "ans": [ "The aircraft electric system", "false" ] }, { "ans": [ "The aircraft pneumatic system", "false" ] } ] }, { "ch": "How can apply the anti-ice chemical to the leading edge of wings?", "ansGr": [ { "ans": [ "It seeps through the holes. Aerodynamic forces cause the fluid to coat the upper and lower surfaces of the airfoil", "true" ] }, { "ans": [ "It sprays out from the nozzle on the wings.", "false" ] }, { "ans": [ "It fills in on the surface of the wings by the special machine", "false" ] } ] }, { "ch": "How long should be applied deicing fluid to remove frost depodit?", "ansGr": [ { "ans": [ "Within 2 hours of flight", "true" ] }, { "ans": [ "No limit time for flight", "false" ] }, { "ans": [ "Before 2 hours of flight", "false" ] } ] }, { "ch": "What type of fluid use to de-icing on ground?", "ansGr": [ { "ans": [ "An ethylene glycol or propylene glycol based liquid", "true" ] }, { "ans": [ "The pure and hot water", "false" ] }, { "ans": [ "The water mix with special chemical", "false" ] } ] }, { "ch": "Air for anti-icing of the wings is obtained from", "ansGr": [ { "ans": [ "Engine compressors", "true" ] }, { "ans": [ "Air conditioning ducting", "false" ] }, { "ans": [ "A combustion heater", "false" ] } ] }, { "ch": "The advantage of leading edge fluid de-icing is", "ansGr": [ { "ans": [ "Aerodynamic shape is not disturbed", "true" ] }, { "ans": [ "Less of a fire hazard", "false" ] }, { "ans": [ "Efficient", "false" ] } ] }, { "ch": "What kind of the duct using to move air from the pneumatic system through the wing leading edge to the leading edge slats?", "ansGr": [ { "ans": [ "Telescoping duct", "true" ] }, { "ans": [ "Titanium duct", "false" ] }, { "ans": [ "Fixed duct", "false" ] } ] }, { "ch": "What name of the valve is used in wing anti-ice system?", "ansGr": [ { "ans": [ "Wing anti-ice valve", "true" ] }, { "ans": [ "Wing anti-ice pressure valve", "false" ] }, { "ans": [ "Wing anti-ice limittaion valve", "false" ] } ] }, { "ch": "Which one controls the WAI system?", "ansGr": [ { "ans": [ "The ACIPS computer card", "true" ] }, { "ans": [ "The Bleed air computer card", "false" ] }, { "ans": [ "The warning computer card", "false" ] } ] }, { "ch": "The WAI valves stay closed as long as the operational mode inhibit is", "ansGr": [ { "ans": [ "Active", "true" ] }, { "ans": [ "Deactive", "false" ] }, { "ans": [ "Standby", "false" ] } ] }, { "ch": "Where can show some information of WAI system?", "ansGr": [ { "ans": [ "Onboard computer maintenance page", "true" ] }, { "ans": [ "Onboard laptop AMM soft", "false" ] }, { "ans": [ "AMM book in cockpit", "false" ] } ] }, { "ch": "How can take a test of WAI system?", "ansGr": [ { "ans": [ "Auto by BITE", "true" ] }, { "ans": [ "Manual by Pilot", "false" ] }, { "ans": [ "No need do Test", "false" ] } ] }, { "ch": "Does the WAI valves move during this test?", "ansGr": [ { "ans": [ "No, they do not move", "true" ] }, { "ans": [ "Yes, They do", "false" ] }, { "ans": [ "They move after test completed", "false" ] } ] }, { "ch": "When the power-up test occurs?", "ansGr": [ { "ans": [ "The card gets power", "true" ] }, { "ans": [ "An aircraft gets power", "false" ] }, { "ans": [ "Hot air is supplied to system", "false" ] } ] }, { "ch": "What is purpose of WAI BITE test?", "ansGr": [ { "ans": [ "This test makes sure that valve malfunctions are detected", "true" ] }, { "ans": [ "This test makes sure that computer working normally", "false" ] }, { "ans": [ "This test makes sure that valve can get the hot air directly", "false" ] } ] }, { "ch": "The EAI controller has a torque motor that moves in response to", "ansGr": [ { "ans": [ "ACIPS - EAI logic card signals", "true" ] }, { "ans": [ "The engine anti-ce inlet valve", "false" ] }, { "ans": [ "the bleed air from high stage compressor", "false" ] } ] }, { "ch": "EAI is automatic when the anti-ice switch is set to", "ansGr": [ { "ans": [ "AUTO", "true" ] }, { "ans": [ "Manual", "false" ] }, { "ans": [ "On", "false" ] } ] }, { "ch": "Which types are often used to prevent the formation of ice in the water lines of water and waste systems on board?", "ansGr": [ { "ans": [ "Electrical heaters", "true" ] }, { "ans": [ "Hot Air", "false" ] }, { "ans": [ "Anti-ice chemical", "false" ] } ] }, { "ch": "In an electrical windshield wiper system, the blades are driven by", "ansGr": [ { "ans": [ "An electric motor(s)", "true" ] }, { "ans": [ "A pneumatic motor(s)", "false" ] }, { "ans": [ "A mechanical motor(s)", "false" ] } ] }, { "ch": "Maintenance performed on windshield wiper systems consists of", "ansGr": [ { "ans": [ "Operational checks, adjustments, and troubleshooting", "true" ] }, { "ans": [ "Operational checks, function check, and troubleshooting", "false" ] }, { "ans": [ "Operational checks, adjustments, and un-replacement", "false" ] } ] }, { "ch": "An operational check should be performed whenever", "ansGr": [ { "ans": [ "A system component is replaced or whenever the system is suspected of notworking properly", "true" ] }, { "ans": [ "A system component is replaced or whenever the system is suspected of working normally", "false" ] }, { "ans": [ "A system component is damaged or whenever the system is suspected of notworking properly", "false" ] } ] }, { "ch": "During the check, make sure that the windshield area covered by", "ansGr": [ { "ans": [ "The wipers is free of foreign matter and is kept wet with water", "true" ] }, { "ans": [ "The wipers is free of movement and is kept wet with water", "false" ] }, { "ans": [ "The wipers is free of foreign matter and is kept wiper blades dry", "false" ] } ] }, { "ch": "Adjustment of a windshield wiper system consists of", "ansGr": [ { "ans": [ "Adjusting the wiper blade tension, the angle at which the blade sweeps across the windshield, and proper parking of the wiper blades", "true" ] }, { "ans": [ "Adjusting the wiper blade length, the angle at which the blade sweeps across the windshield, and proper parking of the wiper blades", "false" ] }, { "ans": [ "Adjusting the wiper blade tension, the angle at which proper parking of the wiper blades, and corrosion of the wiper blades", "false" ] } ] }, { "ch": "Both Pilot and co-pilot use the same the rain repellent system", "ansGr": [ { "ans": [ "No, they are separate system", "true" ] }, { "ans": [ "Yes, they use the same one", "false" ] }, { "ans": [ "It combines the both side", "false" ] } ] }, { "ch": "A rain repellent system permits application of the chemical repellent by", "ansGr": [ { "ans": [ "a switch or push button in the cockpit", "true" ] }, { "ans": [ "Automatic when the windshield is wets", "false" ] }, { "ans": [ "Automatic during the wipre operates", "false" ] } ] }, { "ch": "Why it use the hydrophobic coating on the external surface of windshield?", "ansGr": [ { "ans": [ "The coatings cause raindrops to bead up and roll off, allowing the flight crew better visibility during heavy rain.", "true" ] }, { "ans": [ "Because it is cheaper than wipers and hard to protect the windshield by bird strike", "false" ] }, { "ans": [ "Because this coating can protect the windshield from lighting strike and bird strike", "false" ] } ] }, { "ch": "On large transport aircraft, the windshield wiper system is", "ansGr": [ { "ans": [ "Independent on each side with different power sources", "true" ] }, { "ans": [ "Independent on each side but with the same power source", "false" ] }, { "ans": [ "One system for both sides but with the same power source", "false" ] } ] }, { "ch": "Pneumatic rain removal systems", "ansGr": [ { "ans": [ "Use engine bleed air at high velocity to remove water droplets from windscreen", "true" ] }, { "ans": [ "Are not permitted on large transport aircraft", "false" ] }, { "ans": [ "Use a pneumatic motor to drive windscreen wipers", "false" ] } ] }, { "ch": "Windshield rain repellent is applied", "ansGr": [ { "ans": [ "When rain is on windows and spread by wipers", "true" ] }, { "ans": [ "Before rain and spread on window surface by wipers", "false" ] }, { "ans": [ "When in heavy rain so vision is unobscured", "false" ] } ] }, { "ch": "Does the wiper systems work well in all weather condition?", "ansGr": [ { "ans": [ "No, it is not satisfactory vision in heavy rain", "true" ] }, { "ans": [ "Yes, it provides satisfactory vision in all condition", "false" ] }, { "ans": [ "No, it is not satisfactory vision in small rain only", "false" ] } ] }, { "part": "M13.16 ATA 32", "ch": "What is the primary purpose of aircraft landing gear?", "ansGr": [ { "ans": [ "To support the aircraft during landing and ground operations.", "true" ] }, { "ans": [ "To increase the aircraft’s speed during flight.", "false" ] }, { "ans": [ "To reduce noise during takeoff and landing.", "false" ] } ] }, { "ch": "Which type of landing gear is commonly used on early aircraft?", "ansGr": [ { "ans": [ "Tail wheel-type landing gear (conventional gear)", "true" ] }, { "ans": [ "Tricycle-type landing gear", "false" ] }, { "ans": [ "Tandem landing gear", "false" ] } ] }, { "ch": "What is the purpose of a shock strut in an aircraft's landing gear?", "ansGr": [ { "ans": [ "To absorb and dissipate landing shock loads", "true" ] }, { "ans": [ "To decrease aircraft weight", "false" ] }, { "ans": [ "To improve aircraft lift", "false" ] } ] }, { "ch": "How is shock energy from a landing impact on aircraft primarily controlled?", "ansGr": [ { "ans": [ "It is altered and transferred to the airframe at a different rate and time, and absorbed as heat.", "true" ] }, { "ans": [ "It is immediately dissipated through the structure as kinetic energy.", "false" ] }, { "ans": [ "It is only absorbed by the tires.", "false" ] } ] }, { "ch": "Which landing gear configuration is used for aircraft that operate from snowy surfaces?", "ansGr": [ { "ans": [ "Landing gear with skis", "true" ] }, { "ans": [ "Tricycle-type landing gear", "false" ] }, { "ans": [ "Tandem landing gear", "false" ] } ] }, { "ch": "In tricycle-type landing gear, how is nose gear steering commonly achieved on heavy aircraft?", "ansGr": [ { "ans": [ "Through an independent tiller in the flight deck", "true" ] }, { "ans": [ "By linking the nose gear to the rudder pedals", "false" ] }, { "ans": [ "Through differential braking", "false" ] } ] }, { "ch": "What is the purpose of having multiple wheels on the main gear?", "ansGr": [ { "ans": [ "To spread the weight over a larger area", "true" ] }, { "ans": [ "To improve aerodynamic drag", "false" ] }, { "ans": [ "To increase speed during takeoff", "false" ] } ] }, { "ch": "How does a shock strut absorb the energy from landing impact?", "ansGr": [ { "ans": [ "By converting it into heat energy", "true" ] }, { "ans": [ "By reducing it with mechanical springs", "false" ] }, { "ans": [ "By storing it as compressed air energy", "false" ] } ] }, { "ch": "What is the role of sequence valves in the hydraulic landing gear system of large aircraft?", "ansGr": [ { "ans": [ "To control the timing of gear and gear door operation", "true" ] }, { "ans": [ "To increase hydraulic pressure in the system", "false" ] }, { "ans": [ "To allow fluid to flow only to the gear retraction side", "false" ] } ] }, { "ch": "Which type of landing gear is commonly used on most turbine-powered aircraft?", "ansGr": [ { "ans": [ "Shock strut landing gear.", "true" ] }, { "ans": [ "Rigid steel landing gear.", "false" ] }, { "ans": [ "Bungee cord landing gear.", "false" ] } ] }, { "ch": "What combination of components does a pneumatic/hydraulic shock strut use to absorb shock?", "ansGr": [ { "ans": [ "Compressed air/nitrogen and hydraulic fluid.", "true" ] }, { "ans": [ "Hydraulic fluid and spring coils.", "false" ] }, { "ans": [ "Pneumatic pistons and gear springs.", "false" ] } ] }, { "ch": "What role do torque links play in shock struts?", "ansGr": [ { "ans": [ "They align and retain the piston and wheels.", "true" ] }, { "ans": [ "They lock the wheels in place during retraction.", "false" ] }, { "ans": [ "They reduce friction in the hydraulic system.", "false" ] } ] }, { "ch": "What is the purpose of shock-absorbing equipment in the landing gear system?", "ansGr": [ { "ans": [ "To absorb impact during landing", "true" ] }, { "ans": [ "To control hydraulic retraction", "false" ] }, { "ans": [ "To increase aerodynamic lift", "false" ] } ] }, { "ch": "Which configuration aligns both the main gear and tail gear along the longitudinal axis?", "ansGr": [ { "ans": [ "Tandem landing gear", "true" ] }, { "ans": [ "Tricycle-type landing gear", "false" ] }, { "ans": [ "Tail wheel-type landing gear", "false" ] } ] }, { "ch": "What distinguishes the nose gear control on most tricycle-type landing gear in large aircraft?", "ansGr": [ { "ans": [ "It uses an independent tiller for control", "true" ] }, { "ans": [ "It is connected to the tail wheel", "false" ] }, { "ans": [ "It operates with a simple caster mechanism", "false" ] } ] }, { "ch": "Which part of the tricycle-type landing gear system connects the nose gear to the rudder pedals in light aircraft?", "ansGr": [ { "ans": [ "Mechanical linkage", "true" ] }, { "ans": [ "Hydraulic power steering", "false" ] }, { "ans": [ "Electrical wiring system", "false" ] } ] }, { "ch": "How does a bogie attachment benefit aircraft with multiple wheels on the main landing gear?", "ansGr": [ { "ans": [ "It helps distribute aircraft weight more evenly", "true" ] }, { "ans": [ "It increases the aircraft’s speed", "false" ] }, { "ans": [ "It reduces the need for hydraulic systems", "false" ] } ] }, { "ch": "Why might some light aircraft utilize fixed landing gear instead of retractable landing gear?", "ansGr": [ { "ans": [ "To avoid the additional weight from retraction mechanisms", "true" ] }, { "ans": [ "To reduce aerodynamic efficiency", "false" ] }, { "ans": [ "To simplify braking systems", "false" ] } ] }, { "ch": "What is the function of the close-fitting panel attached to most retractable landing gear?", "ansGr": [ { "ans": [ "To match the aircraft skin and reduce drag when retracted", "true" ] }, { "ans": [ "To stabilize the landing gear when extended", "false" ] }, { "ans": [ "To control hydraulic flow in the retraction mechanism", "false" ] } ] }, { "ch": "In which situations is it most advantageous to use fixed landing gear on an aircraft?", "ansGr": [ { "ans": [ "When additional drag has minimal impact on the aircraft’s performance", "true" ] }, { "ans": [ "When the aircraft is expected to operate on water surfaces", "false" ] }, { "ans": [ "When the aircraft primarily operates in snowy environments", "false" ] } ] }, { "ch": "What is the function of torque links on a shock strut?", "ansGr": [ { "ans": [ "To keep the piston aligned and prevent wheel rotation", "true" ] }, { "ans": [ "To control hydraulic fluid flow", "false" ] }, { "ans": [ "To provide additional shock absorption", "false" ] } ] }, { "ch": "Which type of landing gear commonly uses hydraulic power for retraction and extension?", "ansGr": [ { "ans": [ "Large aircraft landing gear", "true" ] }, { "ans": [ "Light aircraft landing gear", "false" ] }, { "ans": [ "Glider landing gear", "false" ] } ] }, { "ch": "What is the primary purpose of a nose wheel steering system in aircraft?", "ansGr": [ { "ans": [ "To steer the aircraft during ground operations.", "true" ] }, { "ans": [ "To control aircraft speed in the air.", "false" ] }, { "ans": [ "To control landing gear deployment.", "false" ] } ] }, { "ch": "In modern aircraft wheels, what material is commonly used for construction?", "ansGr": [ { "ans": [ "Aluminum or magnesium alloy.", "true" ] }, { "ans": [ "Carbon steel.", "false" ] }, { "ans": [ "Titanium alloy.", "false" ] } ] }, { "ch": "What is the recommended cleaning solvent for wheel bearings?", "ansGr": [ { "ans": [ "Varsol or Stoddard® solvent", "true" ] }, { "ans": [ "Jet fuel", "false" ] }, { "ans": [ "Steam cleaner", "false" ] } ] }, { "ch": "What is a cause of bearing discoloration due to heat?", "ansGr": [ { "ans": [ "Insufficient lubrication", "true" ] }, { "ans": [ "Too much cleaning solvent", "false" ] }, { "ans": [ "Lack of water", "false" ] } ] }, { "ch": "What type of brake is commonly used on modern aircraft?", "ansGr": [ { "ans": [ "Disc brakes", "true" ] }, { "ans": [ "Drum brakes", "false" ] }, { "ans": [ "Cable brakes", "false" ] } ] }, { "ch": "What is the primary function of hydraulic pressure in a single disc brake system?", "ansGr": [ { "ans": [ "To apply friction to the disc", "true" ] }, { "ans": [ "To release the brake pads", "false" ] }, { "ans": [ "To cool the disc", "false" ] } ] }, { "ch": "What is the primary purpose of an anti-skid system on large aircraft?", "ansGr": [ { "ans": [ "To prevent wheel skidding during braking", "true" ] }, { "ans": [ "To increase wheel speed during landing", "false" ] }, { "ans": [ "To engage brakes only at high speed", "false" ] } ] }, { "ch": "Where are wheel speed sensors typically located on an aircraft equipped with an anti-skid system?", "ansGr": [ { "ans": [ "On each wheel with a brake assembly", "true" ] }, { "ans": [ "Inside the cockpit control panel", "false" ] }, { "ans": [ "In the tail section of the aircraft", "false" ] } ] }, { "ch": "What is the primary function of aircraft tires?", "ansGr": [ { "ans": [ "To support the weight of the aircraft and provide traction", "true" ] }, { "ans": [ "To increase speed during takeoff", "false" ] }, { "ans": [ "To reduce the need for brakes", "false" ] } ] }, { "ch": "What do the carcass plies in an aircraft tire consist of?", "ansGr": [ { "ans": [ "Fabric layers encased in rubber", "true" ] }, { "ans": [ "Carbon steel wires", "false" ] }, { "ans": [ "Rubber beads", "false" ] } ] }, { "ch": "In the event of main power system failure, what allows the landing gear to lower on some aircraft?", "ansGr": [ { "ans": [ "Emergency release handles", "true" ] }, { "ans": [ "Automatic electronic systems", "false" ] }, { "ans": [ "Engine-driven hydraulic pumps", "false" ] } ] }, { "ch": "How is hydraulic fluid directed in a nose wheel steering system to allow the wheel to turn?", "ansGr": [ { "ans": [ "Through a metering valve that controls fluid flow to actuators.", "true" ] }, { "ans": [ "Through a single direct connection to the steering tiller.", "false" ] }, { "ans": [ "Through a series of gears that move fluid manually.", "false" ] } ] }, { "ch": "Why are thermal plugs used in high-performance aircraft wheel assemblies?", "ansGr": [ { "ans": [ "To release air from the tire if it overheats, preventing explosion.", "true" ] }, { "ans": [ "To add weight for balance during takeoff.", "false" ] }, { "ans": [ "To keep the wheel and tire assembly from over-rotating.", "false" ] } ] }, { "ch": "What role does a compensator unit play in the nose wheel steering system?", "ansGr": [ { "ans": [ "It maintains constant hydraulic pressure in the steering cylinders.", "true" ] }, { "ans": [ "It regulates the landing gear speed.", "false" ] }, { "ans": [ "It assists in deflating the tires post-landing.", "false" ] } ] }, { "ch": "Why is compressed air drying of bearings without rotation recommended?", "ansGr": [ { "ans": [ "To prevent damage from high-speed metal contact", "true" ] }, { "ans": [ "To avoid cleaning agent contamination", "false" ] }, { "ans": [ "To reduce drying time", "false" ] } ] }, { "ch": "Which condition is characterized by indentations in the bearing cup due to impact?", "ansGr": [ { "ans": [ "Brinelling", "true" ] }, { "ans": [ "Spalling", "false" ] }, { "ans": [ "Staining", "false" ] } ] }, { "ch": "What is the effect of false brinelling on the bearing?", "ansGr": [ { "ans": [ "Rust-colored lubricant", "true" ] }, { "ans": [ "Increased roller spacing", "false" ] }, { "ans": [ "Decreased bearing weight", "false" ] } ] }, { "ch": "Why is immediate lubrication after cleaning and inspection important?", "ansGr": [ { "ans": [ "To prevent corrosion", "true" ] }, { "ans": [ "To clean off solvent", "false" ] }, { "ans": [ "To increase bearing strength", "false" ] } ] }, { "ch": "Why is the floating disc brake design beneficial?", "ansGr": [ { "ans": [ "It provides even friction on both sides of the disc", "true" ] }, { "ans": [ "It increases the weight of the braking system", "false" ] }, { "ans": [ "It prevents hydraulic fluid from entering the system", "false" ] } ] }, { "ch": "What feature of the Cleveland brake makes it easy to service?", "ansGr": [ { "ans": [ "Brake linings can be replaced without removing the wheel", "true" ] }, { "ans": [ "It has a single-disc design", "false" ] }, { "ans": [ "It uses riveted linings on both sides", "false" ] } ] }, { "ch": "How does the design of dual-disc brakes increase braking power?", "ansGr": [ { "ans": [ "By using two discs instead of one to increase friction", "true" ] }, { "ans": [ "By reducing the amount of fluid required", "false" ] }, { "ans": [ "By using smaller brake calipers", "false" ] } ] }, { "ch": "Why do multiple-disc brakes have an automatic adjuster?", "ansGr": [ { "ans": [ "To maintain correct clearances between rotors and stators", "true" ] }, { "ans": [ "To reduce hydraulic pressure", "false" ] }, { "ans": [ "To allow for manual adjustments", "false" ] } ] }, { "ch": "How does the anti-skid system respond when it detects an imminent wheel skid?", "ansGr": [ { "ans": [ "It reduces hydraulic pressure to the brake on the affected wheel", "true" ] }, { "ans": [ "It increases the wheel speed to match other wheels", "false" ] }, { "ans": [ "It automatically locks the wheel to prevent skidding", "false" ] } ] }, { "ch": "Which system components work together to achieve automatic braking in some anti-skid systems?", "ansGr": [ { "ans": [ "Wheel speed sensors, antiskid control valves, and a control unit", "true" ] }, { "ans": [ "Hydraulic master cylinders and rudder pedals", "false" ] }, { "ans": [ "Landing gear and brake assembly", "false" ] } ] }, { "ch": "What role does the squat switch play in an anti-skid system?", "ansGr": [ { "ans": [ "It prevents the brakes from engaging during landing", "true" ] }, { "ans": [ "It activates the brakes during takeoff", "false" ] }, { "ans": [ "It detects skid resistance in the tires", "false" ] } ] }, { "ch": "How does the anti-skid system transition from automatic braking to manual braking during ground maneuvers?", "ansGr": [ { "ans": [ "By switching to manual mode at speeds below 20 mph", "true" ] }, { "ans": [ "By turning off the ground safety switches", "false" ] }, { "ans": [ "By deactivating wheel speed sensors", "false" ] } ] }, { "ch": "Why is it important that the tire sidewall protects the carcass plies?", "ansGr": [ { "ans": [ "To prevent ozone damage and provide tire information", "true" ] }, { "ans": [ "To increase speed and reduce friction", "false" ] }, { "ans": [ "To make the tire lightweight", "false" ] } ] }, { "ch": "How do circumferential grooves in the tread benefit aircraft tires?", "ansGr": [ { "ans": [ "By cooling the tire and channeling water for better adhesion", "true" ] }, { "ans": [ "By increasing the tire’s flexibility", "false" ] }, { "ans": [ "By providing greater sidewall protection", "false" ] } ] }, { "ch": "What is the purpose of a tube in a tube-type aircraft tire?", "ansGr": [ { "ans": [ "To contain air within the tire", "true" ] }, { "ans": [ "To protect against tread wear", "false" ] }, { "ans": [ "To prevent sidewall damage", "false" ] } ] }, { "ch": "In a radial aircraft tire, how are the plies positioned?", "ansGr": [ { "ans": [ "At a 90° angle to the direction of rotation", "true" ] }, { "ans": [ "At a 45° angle to reduce flexibility", "false" ] }, { "ans": [ "In a diagonal pattern around the tire", "false" ] } ] }, { "ch": "What distinguishes a bias ply tire from a radial tire in construction?", "ansGr": [ { "ans": [ "Bias ply tires have plies laid at angles between 30° and 60°", "true" ] }, { "ans": [ "Bias ply tires are made without rubber layers", "false" ] }, { "ans": [ "Bias ply tires do not use fabric in construction", "false" ] } ] }, { "ch": "What is the chine on some aircraft tires designed to do?", "ansGr": [ { "ans": [ "Deflect water away from engine intakes", "true" ] }, { "ans": [ "Strengthen the sidewall", "false" ] }, { "ans": [ "Increase tire flexibility during landings", "false" ] } ] }, { "ch": "How does the selector valve operate when the gear-up position is selected in a hydraulic landing gear system?", "ansGr": [ { "ans": [ "It allows hydraulic pressure to access specific components for retraction", "true" ] }, { "ans": [ "It releases fluid pressure from the gear actuators", "false" ] }, { "ans": [ "It disengages the gear door sequence valves", "false" ] } ] }, { "ch": "In some aircraft, how is gear door closure achieved after the landing gear is retracted?", "ansGr": [ { "ans": [ "Through sequence valves that activate once the gear is stowed", "true" ] }, { "ans": [ "By manual operation by the pilot", "false" ] }, { "ans": [ "By electrically powered door locks", "false" ] } ] }, { "ch": "What is the primary reason for using multiple hydraulic systems in high-performance aircraft for landing gear extension?", "ansGr": [ { "ans": [ "To ensure redundancy in case of main power system failure", "true" ] }, { "ans": [ "To increase aircraft weight for stability", "false" ] }, { "ans": [ "To simplify gear door operation", "false" ] } ] }, { "ch": "Which landing gear inspection task is part of a retraction test?", "ansGr": [ { "ans": [ "Checking for unusual sounds like rubbing or vibration", "true" ] }, { "ans": [ "Replacing hydraulic fluid in the gear system", "false" ] }, { "ans": [ "Adjusting the sequence valve pressure settings", "false" ] } ] }, { "ch": "Why is it essential to perform a retraction test on landing gear after certain repairs?", "ansGr": [ { "ans": [ "To verify proper operation and identify potential malfunctions", "true" ] }, { "ans": [ "To ensure the emergency extension system remains inactive", "false" ] }, { "ans": [ "To check the alignment of the nose wheel only", "false" ] } ] }, { "ch": "During a landing gear retraction test, which observation would be critical to determine if the system is functioning properly?", "ansGr": [ { "ans": [ "The landing gear should retract and extend smoothly without any binding.", "true" ] }, { "ans": [ "The lights should blink continuously to indicate proper operation.", "false" ] }, { "ans": [ "The system should show a “gear disagree” warning at some point.", "false" ] } ] }, { "ch": "What does the presence of three green lights on the instrument panel signify regarding landing gear status?", "ansGr": [ { "ans": [ "The landing gear is down and locked, safe for landing", "true" ] }, { "ans": [ "The landing gear is in transit", "false" ] }, { "ans": [ "The gear selector is in the neutral position", "false" ] } ] }, { "ch": "Why might an aircraft have a gear disagree annunciation light?", "ansGr": [ { "ans": [ "To indicate the landing gear is not in the same position as the selector", "true" ] }, { "ans": [ "To show that the gear doors are fully open", "false" ] }, { "ans": [ "To confirm the gear is down and locked", "false" ] } ] }, { "ch": "How does the follow-up mechanism in a nose wheel steering system prevent over-rotation of the wheel?", "ansGr": [ { "ans": [ "By neutralizing the metering valve once the desired steering angle is reached.", "true" ] }, { "ans": [ "By locking the wheel once a turn is initiated.", "false" ] }, { "ans": [ "By manually adjusting the steering tiller for each degree of turn.", "false" ] } ] }, { "ch": "In what way does a shimmy damper help to stabilize an aircraft during taxiing?", "ansGr": [ { "ans": [ "By reducing oscillations in the nose wheel through hydraulic damping.", "true" ] }, { "ans": [ "By applying additional pressure to the landing gear.", "false" ] }, { "ans": [ "By increasing friction in the nose wheel during taxi operations.", "false" ] } ] }, { "ch": "How does the steering damping feature differ from a shimmy damper in large aircraft?", "ansGr": [ { "ans": [ "Steering damping controls nose wheel direction, while shimmy damping prevents wheel oscillation.", "true" ] }, { "ans": [ "Steering damping is only active during flight, while shimmy damping is only used on the ground.", "false" ] }, { "ans": [ "Both perform the same function in controlling wheel direction.", "false" ] } ] }, { "ch": "Explain how an aircraft wheel’s inner and outer halves differ in their construction and purpose.", "ansGr": [ { "ans": [ "The inner half supports the brake rotor, while the outer half provides access to valve stems.", "true" ] }, { "ans": [ "Both halves serve identical purposes with slight size differences.", "false" ] }, { "ans": [ "The outer half secures the brake disc, while the inner half supports the landing gear strut.", "false" ] } ] }, { "ch": "Describe the potential risks associated with improper axle nut torque on aircraft wheels.", "ansGr": [ { "ans": [ "It may lead to bearing failure or wheel assembly loosening.", "true" ] }, { "ans": [ "It could cause the brake rotor to overheat.", "false" ] }, { "ans": [ "It would result in under-inflation of the tire.", "false" ] } ] }, { "ch": "What inspection technique is commonly used to detect cracks in the bead seat area of aircraft wheels?", "ansGr": [ { "ans": [ "Eddy current inspection to identify internal stress fractures.", "true" ] }, { "ans": [ "Visual inspection for large cracks.", "false" ] }, { "ans": [ "Magnetic particle testing to reveal surface cracks.", "false" ] } ] }, { "ch": "Why is it important to deflate an aircraft tire before removing the wheel assembly?", "ansGr": [ { "ans": [ "To prevent explosive separation due to high internal pressure.", "true" ] }, { "ans": [ "To reduce the weight of the wheel for easier handling.", "false" ] }, { "ans": [ "To balance the remaining wheels on the aircraft.", "false" ] } ] }, { "ch": "Why are balance weights applied to aircraft wheels, and how should they be handled during maintenance?", "ansGr": [ { "ans": [ "To ensure wheel stability, and they should be re-fastened in their original position.", "true" ] }, { "ans": [ "To increase the durability of the wheels, and they should be removed for each flight.", "false" ] }, { "ans": [ "To decrease tire wear, and they should be applied in the tire's center.", "false" ] } ] }, { "ch": "Describe the process of safely drying a bearing with compressed air.", "ansGr": [ { "ans": [ "Direct a blast of air without rotating the bearing", "true" ] }, { "ans": [ "Spin the bearing while drying to ensure thoroughness", "false" ] }, { "ans": [ "Use a combination of air and water", "false" ] } ] }, { "ch": "What issues can arise from using gasoline as a cleaning solvent for bearings?", "ansGr": [ { "ans": [ "Risk of damage due to improper drying", "true" ] }, { "ans": [ "Fuel residue causing lubrication issues", "false" ] }, { "ans": [ "Possibility of immediate bearing corrosion", "false" ] } ] }, { "ch": "How does brinelling affect bearing performance?", "ansGr": [ { "ans": [ "It causes vibration and early failure", "true" ] }, { "ans": [ "It increases bearing lifespan", "false" ] }, { "ans": [ "It improves load-bearing capacity", "false" ] } ] }, { "ch": "Explain the procedure to inspect and seat the bearing cup securely.", "ansGr": [ { "ans": [ "Heat the wheel, cool the cup, and apply primer", "true" ] }, { "ans": [ "Tap the cup with a metallic hammer until it’s tight", "false" ] }, { "ans": [ "Spray lubricant around the cup edges", "false" ] } ] }, { "ch": "Why is handling crucial for maintaining bearing integrity?", "ansGr": [ { "ans": [ "Contaminants or moisture can degrade the bearing", "true" ] }, { "ans": [ "Proper handling increases roller speed", "false" ] }, { "ans": [ "Handling prevents grease buildup", "false" ] } ] }, { "ch": "What is the correct way to manually pack a tapered roller bearing with grease?", "ansGr": [ { "ans": [ "Use hand pressure to push grease through each roller", "true" ] }, { "ans": [ "Dip the bearing in grease and spin it", "false" ] }, { "ans": [ "Pack grease around the outside only", "false" ] } ] }, { "ch": "Identify a sign of overheating in bearing components.", "ansGr": [ { "ans": [ "Bluish tint on metal surfaces", "true" ] }, { "ans": [ "Increased roller spacing", "false" ] }, { "ans": [ "Smooth and shiny bearing surfaces", "false" ] } ] }, { "ch": "Why should steam cleaning be avoided for bearings?", "ansGr": [ { "ans": [ "It compromises the metal surface finish", "true" ] }, { "ans": [ "It enhances bearing corrosion resistance", "false" ] }, { "ans": [ "It increases bearing smoothness", "false" ] } ] }, { "ch": "What does a rusty lubricant in a static bearing indicate?", "ansGr": [ { "ans": [ "False brinelling", "true" ] }, { "ans": [ "Lack of lubricant", "false" ] }, { "ans": [ "Excessive rotation speed", "false" ] } ] }, { "ch": "How does contamination from fine particles affect the bearing surface?", "ansGr": [ { "ans": [ "It causes bruising on the bearing cup", "true" ] }, { "ans": [ "It smoothens the roller surfaces", "false" ] }, { "ans": [ "It enhances the load-carrying capacity", "false" ] } ] }, { "ch": "Explain the role of the bearing cup in ensuring proper bearing function.", "ansGr": [ { "ans": [ "It provides a stable housing to avoid spinning", "true" ] }, { "ans": [ "It allows for flexible positioning", "false" ] }, { "ans": [ "It increases heat resistance of the bearing", "false" ] } ] }, { "ch": "Why is it crucial to consult the manufacturer's manual for bearing maintenance?", "ansGr": [ { "ans": [ "Specific instructions ensure optimal performance and fit", "true" ] }, { "ans": [ "Manuals provide general advice for all bearing types", "false" ] }, { "ans": [ "It allows for alternative lubricants and solvents", "false" ] } ] }, { "ch": "What is the role of a stationary caliper in a disc brake system?", "ansGr": [ { "ans": [ "It resists rotation by applying friction to the disc", "true" ] }, { "ans": [ "It helps in rotating the wheel assembly", "false" ] }, { "ans": [ "It absorbs the heat generated during braking", "false" ] } ] }, { "ch": "How do segmented rotor brakes differ from single disc brakes?", "ansGr": [ { "ans": [ "They are used on larger aircraft for increased braking force", "true" ] }, { "ans": [ "They are lighter and designed for smaller aircraft", "false" ] }, { "ans": [ "They do not require hydraulic fluid to function", "false" ] } ] }, { "ch": "Describe the self-adjusting feature in floating disc brakes.", "ansGr": [ { "ans": [ "It maintains consistent clearance between pucks and the disc", "true" ] }, { "ans": [ "It increases the braking pressure on the disc automatically", "false" ] }, { "ans": [ "It prevents the brake disc from wearing out", "false" ] } ] }, { "ch": "What is the purpose of the return spring in the floating disc brake system?", "ansGr": [ { "ans": [ "To move the piston back away from the disc after braking", "true" ] }, { "ans": [ "To push the disc further into the caliper", "false" ] }, { "ans": [ "To increase friction between the disc and the caliper", "false" ] } ] }, { "ch": "How does the fixed-disc, floating-caliper design ensure even braking pressure?", "ansGr": [ { "ans": [ "By allowing the caliper to move laterally on anchor bolts", "true" ] }, { "ans": [ "By rotating the disc with the wheel", "false" ] }, { "ans": [ "By using hydraulic fluid to lock the disc in place", "false" ] } ] }, { "ch": "In dual-disc brakes, what is the function of the center carrier?", "ansGr": [ { "ans": [ "To provide a surface for linings to contact both discs", "true" ] }, { "ans": [ "To increase the number of pucks used in braking", "false" ] }, { "ans": [ "To store hydraulic fluid in the brake assembly", "false" ] } ] }, { "ch": "Explain the process of hydraulic braking in multiple-disc brakes.", "ansGr": [ { "ans": [ "Hydraulic pressure compresses a stack of rotors and stators to create friction", "true" ] }, { "ans": [ "Hydraulic fluid is applied directly to the disc surface for cooling", "false" ] }, { "ans": [ "Hydraulic pressure is relieved to allow the disc to rotate freely", "false" ] } ] }, { "ch": "Why is heat dissipation a challenge for multiple-disc brakes?", "ansGr": [ { "ans": [ "The rotors and stators are thin and tend to warp under heat", "true" ] }, { "ans": [ "The brake assembly lacks cooling fins", "false" ] }, { "ans": [ "The hydraulic fluid is absorbed quickly by the disc", "false" ] } ] }, { "ch": "What causes the piston to retract in multiple-disc brakes?", "ansGr": [ { "ans": [ "Retracting springs pull the piston back after braking pressure is released", "true" ] }, { "ans": [ "Hydraulic pressure pushes the piston back", "false" ] }, { "ans": [ "The disc automatically realigns with the caliper", "false" ] } ] }, { "ch": "How is wear typically measured in a multiple-disc brake system?", "ansGr": [ { "ans": [ "Using a wear gauge to measure the rotor and stator thickness", "true" ] }, { "ans": [ "By visual inspection of the brake linings", "false" ] }, { "ans": [ "Using the length of the caliper bolts", "false" ] } ] }, { "ch": "What are the key components of a multiple-disc brake assembly?", "ansGr": [ { "ans": [ "An extended bearing carrier, rotors, stators, and a hydraulic piston", "true" ] }, { "ans": [ "A single disc and a stationary caliper", "false" ] }, { "ans": [ "Brake cables and a brake lever", "false" ] } ] }, { "ch": "Describe how a DC wheel speed sensor differs from an AC wheel speed sensor in an anti-skid system.", "ansGr": [ { "ans": [ "A DC sensor produces a voltage directly proportional to wheel speed, while an AC sensor produces a variable frequency signal proportional to wheel speed", "true" ] }, { "ans": [ "A DC sensor uses an electromagnet while an AC sensor does not", "false" ] }, { "ans": [ "A DC sensor requires a control valve, while an AC sensor requires a control box", "false" ] } ] }, { "ch": "What is the function of the velocity comparator in an anti-skid system control unit?", "ansGr": [ { "ans": [ "To compare the wheel speed with aircraft speed and detect skidding", "true" ] }, { "ans": [ "To measure hydraulic fluid levels in the brake system", "false" ] }, { "ans": [ "To maintain the brake pressure below a preset threshold", "false" ] } ] }, { "ch": "When would the antiskid system return to manual braking mode after touchdown?", "ansGr": [ { "ans": [ "When the aircraft speed drops to approximately 20 mph", "true" ] }, { "ans": [ "After the wheels stop rotating", "false" ] }, { "ans": [ "Once the hydraulic system is pressurized", "false" ] } ] }, { "ch": "How does the anti-skid control unit respond to a sudden skid detected by the transient control output?", "ansGr": [ { "ans": [ "It quickly reduces brake pressure to the affected wheel", "true" ] }, { "ans": [ "It locks the wheel to prevent further sliding", "false" ] }, { "ans": [ "It increases brake pressure to restore balance", "false" ] } ] }, { "ch": "What additional safety function does the anti-skid system perform during takeoff?", "ansGr": [ { "ans": [ "It disables braking to prevent wheels from rotating during retraction", "true" ] }, { "ans": [ "It engages full brake pressure to ensure smooth lift-off", "false" ] }, { "ans": [ "It activates the ground safety switch for increased stability", "false" ] } ] }, { "ch": "In the anti-skid system, what issue might occur if the squat switch fails to activate upon landing?", "ansGr": [ { "ans": [ "The brakes may engage too early, risking tire blowout", "true" ] }, { "ans": [ "The wheel speed sensors may become deactivated", "false" ] }, { "ans": [ "The control unit will disable all brakes until repair", "false" ] } ] }, { "ch": "Explain the purpose of a pressure bias modulator circuit within an anti-skid system.", "ansGr": [ { "ans": [ "To regulate brake pressure and optimize braking efficiency", "true" ] }, { "ans": [ "To monitor hydraulic fluid temperature", "false" ] }, { "ans": [ "To control the timing of brake application", "false" ] } ] }, { "ch": "Why is locked wheel protection important in an anti-skid system?", "ansGr": [ { "ans": [ "To prevent uneven tire wear and potential skidding during braking", "true" ] }, { "ans": [ "To engage brakes on both wheels simultaneously", "false" ] }, { "ans": [ "To ensure braking is applied only at high speeds", "false" ] } ] }, { "ch": "What regular maintenance action is recommended to ensure the control valve in an anti-skid system remains functional?", "ansGr": [ { "ans": [ "Cleaning or replacing hydraulic system filters", "true" ] }, { "ans": [ "Installing additional sensors near the brake assembly", "false" ] }, { "ans": [ "Testing at least once per year with an operational light test", "false" ] } ] }, { "ch": "Why might the wheel speed sensor wiring in an anti-skid system require frequent inspection?", "ansGr": [ { "ans": [ "It is subject to harsh environmental conditions that can affect integrity", "true" ] }, { "ans": [ "It easily becomes dislodged from the wheel assembly", "false" ] }, { "ans": [ "It must be adjusted with every landing cycle", "false" ] } ] }, { "ch": "Describe the role of the summing amplifier in an anti-skid system.", "ansGr": [ { "ans": [ "It combines input voltages to control brake pressure adjustments", "true" ] }, { "ans": [ "It compares the wheel speed with the hydraulic fluid speed", "false" ] }, { "ans": [ "It signals the landing gear to lock during takeoff", "false" ] } ] }, { "ch": "How does the anti-skid system’s control unit handle signals indicating skidding on one wheel of a paired set?", "ansGr": [ { "ans": [ "It relieves pressure on the slower rotating wheel to prevent further skid", "true" ] }, { "ans": [ "It increases pressure to both wheels until they reach the same speed", "false" ] }, { "ans": [ "It stops hydraulic flow to the faster rotating wheel", "false" ] } ] }, { "ch": "Why must aircraft tires be carefully maintained in diverse operating conditions?", "ansGr": [ { "ans": [ "They undergo multiple stresses and need consistent performance", "true" ] }, { "ans": [ "They are used to carry heavy weights over long distances", "false" ] }, { "ans": [ "They need to reduce speed to prevent overloading", "false" ] } ] }, { "ch": "How does a bias ply tire’s construction contribute to its flexibility?", "ansGr": [ { "ans": [ "The angled plies allow the sidewall to flex with the fabric", "true" ] }, { "ans": [ "The use of rubber makes it deform more easily", "false" ] }, { "ans": [ "Its inner liner creates added flexibility", "false" ] } ] }, { "ch": "What role does high-strength carbon steel play in the tire bead?", "ansGr": [ { "ans": [ "It anchors the tire carcass to the wheel rim", "true" ] }, { "ans": [ "It makes the tread resistant to abrasion", "false" ] }, { "ans": [ "It provides flexibility during landings", "false" ] } ] }, { "ch": "Explain the benefit of using a radial tire on modern aircraft.", "ansGr": [ { "ans": [ "It provides high load support with minimal deformation", "true" ] }, { "ans": [ "It increases flexibility in rough landing conditions", "false" ] }, { "ans": [ "It allows better heat resistance", "false" ] } ] }, { "ch": "What would likely happen if a non-aircraft tire were used on an aircraft?", "ansGr": [ { "ans": [ "It might fail due to insufficient high-impact load resistance", "true" ] }, { "ans": [ "It would withstand the forces but lose traction", "false" ] }, { "ans": [ "It would increase taxiing speed and heat tolerance", "false" ] } ] }, { "ch": "How does the tire tread design aid in high-speed operations?", "ansGr": [ { "ans": [ "The tread resists heat buildup and enhances durability", "true" ] }, { "ans": [ "The tread increases the flexibility of the tire", "false" ] }, { "ans": [ "The tread improves comfort during landings", "false" ] } ] }, { "ch": "Why is it critical to inspect tire inflation pressure on aircraft tires?", "ansGr": [ { "ans": [ "To maintain performance and prevent uneven wear", "true" ] }, { "ans": [ "To allow for longer storage periods", "false" ] }, { "ans": [ "To reduce the tire’s braking distance", "false" ] } ] }, { "ch": "Describe the ideal method for approaching an overheated or damaged aircraft tire.", "ansGr": [ { "ans": [ "Approach from an oblique angle after it has cooled", "true" ] }, { "ans": [ "Inspect immediately from any direction to reduce waiting time", "false" ] }, { "ans": [ "Approach directly in front of the tire", "false" ] } ] }, { "ch": "Why might a bias ply tire be preferred over a radial for certain aircraft?", "ansGr": [ { "ans": [ "It offers more flexibility due to angled plies", "true" ] }, { "ans": [ "It provides a higher speed tolerance", "false" ] }, { "ans": [ "It requires fewer materials to construct", "false" ] } ] }, { "ch": "What could happen if the tire sidewall did not resist ozone effects?", "ansGr": [ { "ans": [ "The tire could weaken and potentially fail", "true" ] }, { "ans": [ "The tire would increase in flexibility", "false" ] }, { "ans": [ "The tire would retain heat", "false" ] } ] }, { "ch": "Explain why a tube-type tire lacks an inner liner.", "ansGr": [ { "ans": [ "The tube itself holds air and prevents leaks", "true" ] }, { "ans": [ "The tube-type tire doesn’t need to hold air", "false" ] }, { "ans": [ "It provides extra weight to balance the tire", "false" ] } ] }, { "ch": "Why are only manufacturer-specified tires used on aircraft?", "ansGr": [ { "ans": [ "To ensure the tire meets the specific load and speed requirements", "true" ] }, { "ans": [ "To allow for frequent and varied usage across models", "false" ] }, { "ans": [ "To provide additional cushioning during rough landings", "false" ] } ] }, { "ch": "What is the primary function of the grooves in aircraft tire tread?", "ansGr": [ { "ans": [ "To help with cooling and channel water away", "true" ] }, { "ans": [ "To increase load capacity", "false" ] }, { "ans": [ "To reduce rubber use during production", "false" ] } ] }, { "ch": "In a large passenger aircraft, which system component would typically receive input from air- ground sensing for its operation?", "ansGr": [ { "ans": [ "Autopilot Flight Director Computer.", "true" ] }, { "ans": [ "Emergency locator beacon.", "false" ] }, { "ans": [ "In-flight entertainment unit.", "false" ] } ] }, { "ch": "How do WOW (Weight on Wheels) sensors contribute to air-ground sensing in modern aircraft?", "ansGr": [ { "ans": [ "They detect the bending of landing gear beams under the aircraft's weight to send a signal.", "true" ] }, { "ans": [ "They measure tire pressure upon landing to relay a weight estimate.", "false" ] }, { "ans": [ "They monitor the rotation speed of the wheels to determine ground contact.", "false" ] } ] }, { "ch": "What type of signal is sent from the load sensor to the WOW(Weight on Wheels) card?", "ansGr": [ { "ans": [ "Analog", "true" ] }, { "ans": [ "Digital", "false" ] }, { "ans": [ "Binary", "false" ] } ] }, { "ch": "What component transmits air-ground status to other systems?", "ansGr": [ { "ans": [ "WOW card", "true" ] }, { "ans": [ "Load sensor", "false" ] }, { "ans": [ "Gear actuator", "false" ] } ] }, { "ch": "What is a basic difference between proximity switches and load sensors?", "ansGr": [ { "ans": [ "Load sensors can detect weight", "true" ] }, { "ans": [ "Load sensors use hydraulic feedback", "false" ] }, { "ans": [ "Load sensors are mechanical", "false" ] } ] }, { "ch": "What safety precaution must be taken when handling WOW cards?", "ansGr": [ { "ans": [ "ESD protection", "true" ] }, { "ans": [ "Hydraulic isolation", "false" ] }, { "ans": [ "Gear pin installed", "false" ] } ] }, { "ch": "What happens when the gear beam bends under weight?", "ansGr": [ { "ans": [ "Sensor distance changes", "true" ] }, { "ans": [ "Circuit breaker trips", "false" ] }, { "ans": [ "Gear retracts", "false" ] } ] }, { "ch": "What must be done after replacing a WOW(Weight on Wheels) card?", "ansGr": [ { "ans": [ "Calibrate sensors", "true" ] }, { "ans": [ "Drain hydraulic fluid", "false" ] }, { "ans": [ "Replace actuator", "false" ] } ] }, { "ch": "Where can the technician view and test air-ground system status?", "ansGr": [ { "ans": [ "Gear maintenance page", "true" ] }, { "ans": [ "Autopilot screen", "false" ] }, { "ans": [ "Fuel control panel", "false" ] } ] } ]