[ { "part": "M11.11 ATA 29", "ch": "Basically, hydraulic systems normally operate at", "ansGr": [ { "ans": [ "3000 PSI", "true" ] }, { "ans": [ "2000 PSI", "false" ] }, { "ans": [ "1000 PSI", "false" ] } ] }, { "ch": "What happens to hydraulic fluid when it is overheated?", "ansGr": [ { "ans": [ "Increase acidity", "true" ] }, { "ans": [ "Increase viscosity", "false" ] }, { "ans": [ "Increase alkalinity", "false" ] } ] }, { "ch": "During a leak test of an hydraulic system, system pressure", "ansGr": [ { "ans": [ "Must be at maximum", "true" ] }, { "ans": [ "Is not important", "false" ] }, { "ans": [ "Must be minimum working", "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": "Which sourses used to pressurized reservoir?", "ansGr": [ { "ans": [ "The bleed air or pressure of hydraulic system", "true" ] }, { "ans": [ "Direct hot and high pressure from engines", "false" ] }, { "ans": [ "Direct high pressure from hydraulic pumps", "false" ] } ] }, { "ch": "The value of the pressure in reservoir in normal is", "ansGr": [ { "ans": [ "40-50 PSI", "true" ] }, { "ans": [ "100-200 PSI", "false" ] }, { "ans": [ "2000-3000 PSI", "false" ] } ] }, { "ch": "How many types of the accummulators used in aircraft hydraulic system?", "ansGr": [ { "ans": [ "Two", "true" ] }, { "ans": [ "Four", "false" ] }, { "ans": [ "Six", "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": "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 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": "For Vane pump, 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": "For vane pump, 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": "A check flow valve in a hydraulic system prevents", "ansGr": [ { "ans": [ "Reverse flow", "true" ] }, { "ans": [ "Pump cavitation", "false" ] }, { "ans": [ "Overpressure", "false" ] } ] }, { "ch": "A thermal relief valve", "ansGr": [ { "ans": [ "Senses fluid pressure", "true" ] }, { "ans": [ "Provides cooling for the fluid", "false" ] }, { "ans": [ "Senses fluid temperature change", "false" ] } ] }, { "ch": "Mechanical sequence valves are operated by", "ansGr": [ { "ans": [ "A striker pin", "true" ] }, { "ans": [ "The pilot", "false" ] }, { "ans": [ "The operation of a NRV", "false" ] } ] }, { "ch": "An automatic cut-out valve will", "ansGr": [ { "ans": [ "Prevent the hydraulic lock forming", "true" ] }, { "ans": [ "Limit pump wear", "false" ] }, { "ans": [ "Raise fluid boiling point", "false" ] } ] }, { "ch": "What is the general type of the hydraulic pump in aircraft hydraulic system?", "ansGr": [ { "ans": [ "Engine driven pump", "true" ] }, { "ans": [ "Hand pump", "false" ] }, { "ans": [ "Pneumatic pump", "false" ] } ] }, { "ch": "In general, the backup hydraulic pump is", "ansGr": [ { "ans": [ "The hand pump", "true" ] }, { "ans": [ "The engine driven pump", "false" ] }, { "ans": [ "The electrical pump", "false" ] } ] }, { "ch": "How many sources drives the hydraulic pump basically?", "ansGr": [ { "ans": [ "Three", "true" ] }, { "ans": [ "Two", "false" ] }, { "ans": [ "One", "false" ] } ] }, { "ch": "The engine driven pump is operated by", "ansGr": [ { "ans": [ "Mechanically source", "true" ] }, { "ans": [ "Electrically source", "false" ] }, { "ans": [ "Pneumatic source", "false" ] } ] }, { "ch": "Which is the primary source of hydraualic pressure generation on most aircraft?", "ansGr": [ { "ans": [ "Mechanically driven pump", "true" ] }, { "ans": [ "Electrical pump", "false" ] }, { "ans": [ "Hand pump", "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": "Hydraulic pressure can be restored by", "ansGr": [ { "ans": [ "Compressing the air charge in an accumulator", "true" ] }, { "ans": [ "The use of a pressure/heat exchanger", "false" ] }, { "ans": [ "Compressing the fluid in a reservoir", "false" ] } ] }, { "ch": "What happens if a component has an internal hydraulic leak?", "ansGr": [ { "ans": [ "Increase in fluid temperature", "true" ] }, { "ans": [ "Fluid loss", "false" ] }, { "ans": [ "Increase in fluid pressure", "false" ] } ] }, { "ch": "Where is the temperature overheat switch located in a hydraulic pump?", "ansGr": [ { "ans": [ "In the case drain", "true" ] }, { "ans": [ "In the pressure line", "false" ] }, { "ans": [ "In the suction line", "false" ] } ] }, { "ch": "Accumulators as fitted to aircraft hydraulic systems", "ansGr": [ { "ans": [ "Store fluid under pressure", "true" ] }, { "ans": [ "Are only ever used in an emergency", "false" ] }, { "ans": [ "Provide additional fluid if leaks occur", "false" ] } ] }, { "ch": "A Skydrol hydraulic fluid seal would be made of", "ansGr": [ { "ans": [ "Butyl rubber", "true" ] }, { "ans": [ "Natural rubber", "false" ] }, { "ans": [ "Synthetic rubber", "false" ] } ] }, { "ch": "How can choose type of hydraulic fluid in case of flushing hydraulic systems?", "ansGr": [ { "ans": [ "Flush with same hydraulic oil", "true" ] }, { "ans": [ "Flush with methylated spirit", "false" ] }, { "ans": [ "Flush with any hydraulic oil", "false" ] } ] }, { "ch": "When replenishing a hydraulic system", "ansGr": [ { "ans": [ "Use the same/correct hydraulic fluid", "true" ] }, { "ans": [ "Use any kind of the hydraulic fluid", "false" ] }, { "ans": [ "Use any hydraulic fluid made by the same manufacturer", "false" ] } ] }, { "ch": "If an accumulator loses air pressure there will be", "ansGr": [ { "ans": [ "Rapid fluctuations of instruments", "true" ] }, { "ans": [ "Rapid depressurisation of system", "false" ] }, { "ans": [ "Pump cavitation", "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": "The end fittings on a NRV are normally different to", "ansGr": [ { "ans": [ "Prevent incorrect installation", "true" ] }, { "ans": [ "Facilitate bleeding of the system", "false" ] }, { "ans": [ "Allow a full flow from the valve", "false" ] } ] }, { "ch": "Where is the pressure relay valve is fitted in the hydraulic system?", "ansGr": [ { "ans": [ "Before a pressure gauge", "true" ] }, { "ans": [ "Before a pressure sequence valve", "false" ] }, { "ans": [ "Before a pressure relief valve", "false" ] } ] }, { "ch": "Hydraulic reservoirs are pressurized to", "ansGr": [ { "ans": [ "Minimize the possibility of pump cavitation", "true" ] }, { "ans": [ "Provide a reserve of stored energy", "false" ] }, { "ans": [ "Maintain a constant fluid level", "false" ] } ] }, { "ch": "Hydraulic systems are normally flushed with", "ansGr": [ { "ans": [ "The same type of fluid", "true" ] }, { "ans": [ "Any clean hydraulic fluid", "false" ] }, { "ans": [ "Methylated spirits", "false" ] } ] }, { "ch": "A RAT hydraulic pump is for", "ansGr": [ { "ans": [ "Flying controls if hydraulic power lost", "true" ] }, { "ans": [ "Landing gear and auto-brake systems", "false" ] }, { "ans": [ "Nose wheel steering", "false" ] } ] }, { "ch": "A restrictor valve", "ansGr": [ { "ans": [ "May be used to slow down undercarriage extension", "true" ] }, { "ans": [ "Speed up the flow in one direction", "false" ] }, { "ans": [ "Restrict the extent of travel of the undercarriage", "false" ] } ] }, { "ch": "A normal hydraulic system will", "ansGr": [ { "ans": [ "Show pressure and source of hydraulics", "true" ] }, { "ans": [ "Show fluid temperature and quantity", "false" ] }, { "ans": [ "Illuminate a light in the cockpit when the system is ready", "false" ] } ] }, { "ch": "A pressure control relay in a hydraulic pump is", "ansGr": [ { "ans": [ "De-energised to start the pump", "true" ] }, { "ans": [ "Energised to the run position", "false" ] }, { "ans": [ "Used to prevent anything happening until there is hydraulic pressure", "false" ] } ] }, { "ch": "A maintainer valve in an hydraulic system will", "ansGr": [ { "ans": [ "Allow continued press to essential systems during times of reduced supply", "true" ] }, { "ans": [ "Dampen pressure inputs", "false" ] }, { "ans": [ "Maintain a high pressure to all systems", "false" ] } ] }, { "ch": "What is the purpose of a 'cut-out' in a hydraulic system?", "ansGr": [ { "ans": [ "To relieve the pump of load when the operation of services is complete and the accumulator charged with fluid", "true" ] }, { "ans": [ "To prevent creep in jack operated services which have several selected positions.", "false" ] }, { "ans": [ "To limit loss of fluid in the event of pipe fracture", "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": "Automatic cut-out valve hammering is caused by", "ansGr": [ { "ans": [ "Low accumulator pressure", "true" ] }, { "ans": [ "Moisture in the fluid", "false" ] }, { "ans": [ "Relief valve set too high", "false" ] } ] }, { "ch": "How is the hydraulic pump depressurising solenoid actuated?", "ansGr": [ { "ans": [ "Energised Closed for fail-safe", "true" ] }, { "ans": [ "Energised Open", "false" ] }, { "ans": [ "Energised both open and closed depending on cockpit selection", "false" ] } ] }, { "ch": "A constant volume hydraulic system uses what to relieve pressure in system when no services are being used?", "ansGr": [ { "ans": [ "ACOV", "true" ] }, { "ans": [ "Pressure relief valve", "false" ] }, { "ans": [ "Return line back to pump", "false" ] } ] }, { "ch": "A duplex seal consist of", "ansGr": [ { "ans": [ "A rubber 'T' section ring sandwiched between two Teflon rings", "true" ] }, { "ans": [ "A square section rubber ring within a steel washer", "false" ] }, { "ans": [ "A hard rubber square section ring with a soft rubber square section inner ring", "false" ] } ] }, { "ch": "A fixed volume axial pump contains the following rotating parts", "ansGr": [ { "ans": [ "Drive Shaft, Swash Plate & Cylinder Block", "true" ] }, { "ans": [ "Drive Shaft, Swash Plate & Valve Block", "false" ] }, { "ans": [ "Swash Plate & Valve Block", "false" ] } ] }, { "ch": "An hydraulic closed system is one where", "ansGr": [ { "ans": [ "Pressure is maintained at the selector valves at all times", "true" ] }, { "ans": [ "There is no pressure at the selector valves when no functions are required", "false" ] }, { "ans": [ "Most of the major components of the system are included in a self contained unit", "false" ] } ] }, { "ch": "A marker number on a pipe indicates", "ansGr": [ { "ans": [ "The specification of the pipe throughout the pipe run", "true" ] }, { "ans": [ "The thickness of the wall on the pipe", "false" ] }, { "ans": [ "The type of fluid used to pressure test the pipe", "false" ] } ] }, { "ch": "One reason for fitting an accumulator in an hydraulic system is to", "ansGr": [ { "ans": [ "Absorb pressure surges", "true" ] }, { "ans": [ "Minimize the possibility of pump cavitation", "false" ] }, { "ans": [ "Relieve excess pressure", "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": "A hydraulic accumulator is charged with initial air pressure of 1000 PSI. When the hydraulic system pressure of 3000 PSI is reached, the air pressure is", "ansGr": [ { "ans": [ "3000 PSI", "true" ] }, { "ans": [ "4000 PSI", "false" ] }, { "ans": [ "1000 PSI", "false" ] } ] }, { "ch": "Constant delivery hydraulic pumps", "ansGr": [ { "ans": [ "Require an automatic cut-out valve and accumulator in the system", "true" ] }, { "ans": [ "Require an automatic cut-out valve in the system", "false" ] }, { "ans": [ "Are self idling", "false" ] } ] }, { "ch": "Before checking the initial pressure in the hydraulic accumulator", "ansGr": [ { "ans": [ "The fluid pressure must be released", "true" ] }, { "ans": [ "The reservoir must be checked for correct level", "false" ] }, { "ans": [ "All air must be bled from the system", "false" ] } ] }, { "ch": "The essential components of a hydraulic system of the constant delivery type are an", "ansGr": [ { "ans": [ "Accumulator and automatic cut-out valve", "true" ] }, { "ans": [ "Accumulator and shuttle valve", "false" ] }, { "ans": [ "Accumulator and relay valve", "false" ] } ] }, { "ch": "A maintaining valve is fitted to a hydraulic system", "ansGr": [ { "ans": [ "To ensure a supply of fluid to essential services in the event of system failure", "true" ] }, { "ans": [ "To maintain a back pressure to the accumulator", "false" ] }, { "ans": [ "To relieve excessive pressure to return line", "false" ] } ] }, { "ch": "To enable an hydraulic system to operate two components requiring different pressures", "ansGr": [ { "ans": [ "A pressure reducing valve is used", "true" ] }, { "ans": [ "A pressure regulating valve is used", "false" ] }, { "ans": [ "A pressure relief valve is used", "false" ] } ] }, { "ch": "Modern transport aircrafts use an other hydraulic power, it is", "ansGr": [ { "ans": [ "A PTU (Power Transfer Unit)", "true" ] }, { "ans": [ "A PCU (Power Control Unit)", "false" ] }, { "ans": [ "A PSU (Power Sharing Unit)", "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 component to prevent failure of components or rupture of hydraulic lines under excessive pressures", "ansGr": [ { "ans": [ "The pressure relief valve", "true" ] }, { "ans": [ "The pressure regulator valve", "false" ] }, { "ans": [ "The pressure shut-off valve", "false" ] } ] }, { "ch": "How to change the value of the limit pressure of relief valve?", "ansGr": [ { "ans": [ "Adjusted by increasing or decreasing the tension on the spring to determine the pressure required to open the valve", "true" ] }, { "ans": [ "Adjusted by increasing or decreasing the torque motor to determine the pressure required to open the valve", "false" ] }, { "ans": [ "Adjusted by increasing or decreasing the value of selenoir to determine the pressure required to open the valve", "false" ] } ] }, { "ch": "When a constant displacement pump is used in a hydraulic system, which componant will keep the pressure at a constant value?", "ansGr": [ { "ans": [ "A pressure regulator", "true" ] }, { "ans": [ "A limitation valve", "false" ] }, { "ans": [ "A constant pressure", "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": "Since the constant-delivery pump provides a fixed quantity of fluid during each revolution of the pump, the quantity of fluid delivered per minute depends upon", "ansGr": [ { "ans": [ "Pump rotations per minute", "true" ] }, { "ans": [ "Volume of the pump", "false" ] }, { "ans": [ "Pressure of the pump", "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": "The inlet port of the pump is connected to the reservoir, and the outlet port is connected to", "ansGr": [ { "ans": [ "The pressure line", "true" ] }, { "ans": [ "The return line", "false" ] }, { "ans": [ "The suction line", "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": "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": "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": "The aircraft’s engine rotates the pump drive shaft, cylinder block, and pistons via", "ansGr": [ { "ans": [ "A gearbox", "true" ] }, { "ans": [ "An electrical motor", "false" ] }, { "ans": [ "A hydraulic motor", "false" ] } ] }, { "ch": "Because the yoke is at an angle to the drive shaft, the rotary motion of the shaft is converted to", "ansGr": [ { "ans": [ "Piston reciprocating motion", "true" ] }, { "ans": [ "Piston horizontal motion", "false" ] }, { "ans": [ "Piston totational motion", "false" ] } ] }, { "ch": "The pressure compensator is a spool valve that is held in the closed position by", "ansGr": [ { "ans": [ "An adjustable spring load", "true" ] }, { "ans": [ "A electrical selenoir", "false" ] }, { "ans": [ "The supply pressure", "false" ] } ] }, { "ch": "The reduced angle of the yoke results in a shorter stroke for the pistons and", "ansGr": [ { "ans": [ "Reduced displacement", "true" ] }, { "ans": [ "Increased displacement", "false" ] }, { "ans": [ "No change displacement", "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": "To determine the pressure required to open, the pressure relief valves are adjusted by", "ansGr": [ { "ans": [ "Increasing or decreasing the tension on the spring", "true" ] }, { "ans": [ "A pressure value which comes from the hydraulic pumps", "false" ] }, { "ans": [ "Increasing or decreasing the diameter of valves", "false" ] } ] }, { "ch": "Where fluid will go to after the pressure relief valve open?", "ansGr": [ { "ans": [ "To the reservoir return line", "true" ] }, { "ans": [ "Back to the supply line", "false" ] }, { "ans": [ "Return to the pressure line after pumps", "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 reducing valve can normally be set for any desired", "ansGr": [ { "ans": [ "Downstream pressure within the design limits of the valve", "true" ] }, { "ans": [ "Upstream pressure within the design limits of the valve", "false" ] }, { "ans": [ "Return line pressure within the design limits of the valve", "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": "An open-center valve allows a continuous flow of system hydraulic fluid through the valve even when", "ansGr": [ { "ans": [ "The selector is not in a position to actuate a unit", "true" ] }, { "ans": [ "The selector is in off position", "false" ] }, { "ans": [ "The selector is not closing in a position to actuate a unit", "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": "The four ports on a four-way selector valve are one port receives pressurized fluid from the system hydraulic pump. A second port always returns fluid to the reservoir.", "ansGr": [ { "ans": [ "The third and forth ports are used to connect the selector valve to the actuating unit", "true" ] }, { "ans": [ "The third and forth ports are used to connect the selector valve to other valves", "false" ] }, { "ans": [ "The third and forth ports are used to connect the selector valve to other unit", "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": "How to control the sequence of operation between two branches in a circuit?", "ansGr": [ { "ans": [ "By sequence valves", "true" ] }, { "ans": [ "By regulator valve", "false" ] }, { "ans": [ "By check valve", "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": "What is the colour of the band on a hydraulic seal?", "ansGr": [ { "ans": [ "Green", "true" ] }, { "ans": [ "Yellow", "false" ] }, { "ans": [ "White", "false" ] } ] }, { "ch": "Phosphate Ester hydraulic fluid requires which kind of seals?", "ansGr": [ { "ans": [ "Butyl Rubber", "true" ] }, { "ans": [ "Synthetic Rubber", "false" ] }, { "ans": [ "Natural Rubber", "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": "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": "In case of an electrical failure, a hydraulic motor driven generator provides", "ansGr": [ { "ans": [ "An alternative source of electrical power", "true" ] }, { "ans": [ "An alternative source of hydraulic power", "false" ] }, { "ans": [ "A main source of electrical power", "false" ] } ] }, { "ch": "Which pumps will be used when engine-driven pumps fail, in generally?", "ansGr": [ { "ans": [ "Electrically-driven pumps", "true" ] }, { "ans": [ "Hand pumps", "false" ] }, { "ans": [ "Pneumatic-driven pumps", "false" ] } ] }, { "ch": "Which addition source of hydraulic and electric power is supplied if engine driven pumps and electrical generators fail in the large transport aircraft?", "ansGr": [ { "ans": [ "It is a ram air turbine", "true" ] }, { "ans": [ "It is the hand pump", "false" ] }, { "ans": [ "It is the main batteries", "false" ] } ] }, { "ch": "Which energy source use for RAT operates?", "ansGr": [ { "ans": [ "Ramp air", "true" ] }, { "ans": [ "Bleed air", "false" ] }, { "ans": [ "Mechanical driver", "false" ] } ] }, { "ch": "How the RAT is installed in the aircraft?", "ansGr": [ { "ans": [ "It is installed inside the fuselage", "true" ] }, { "ans": [ "It is installed outside the fuselage", "false" ] }, { "ans": [ "It is installed inside the engine", "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": "Hydraulic motors are basically the same as hydraulic pumps except they are used to convert", "ansGr": [ { "ans": [ "Hydraulic energy into mechanical (rotary) energy", "true" ] }, { "ans": [ "Mechanical (rotary) energy into hydraulic energy", "false" ] }, { "ans": [ "Hydraulic energy into electrical energy", "false" ] } ] }, { "ch": "Which types of hydraulic motors in basiclly?", "ansGr": [ { "ans": [ "Hydraulic motors are either of the axial inline or bent-axis type", "true" ] }, { "ans": [ "Hydraulic motors are either of the axial incline or bent-axis type", "false" ] }, { "ans": [ "Hydraulic motors are either of the axial inline or rotation-axis type", "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": "Which component is used to detect pump failure which open a valve to divert fluid from the healthy system to the PTU, in an automatically activated setup?", "ansGr": [ { "ans": [ "A pressure switch", "true" ] }, { "ans": [ "A thermal switch", "false" ] }, { "ans": [ "A sensor line", "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": "The generator part is typically designed to maintain the desired system output frequency of", "ansGr": [ { "ans": [ "400 Hz", "true" ] }, { "ans": [ "115 Hz", "false" ] }, { "ans": [ "60 Hz", "false" ] } ] }, { "ch": "Conversely, a hydraulic pump failure is backed up by", "ansGr": [ { "ans": [ "An electrically driven hydraulic pump", "true" ] }, { "ans": [ "An mechanically driven hydraulic pump", "false" ] }, { "ans": [ "An electrically driven hydraulic actuator", "false" ] } ] }, { "ch": "When the selector valve is placed in the ON or EXTEND position, fluid is admitted under pressure to the left-hand chamber of the actuating cylinder", "ansGr": [ { "ans": [ "This results in the piston being forced toward the right", "true" ] }, { "ans": [ "This results in the piston being forced toward the left", "false" ] }, { "ans": [ "This results in the piston being forced toward the neutral", "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": "Where is the hydraulic exchanger location?", "ansGr": [ { "ans": [ "In the Fuel tanks", "true" ] }, { "ans": [ "Outside of the fuselage", "false" ] }, { "ans": [ "In the APU compartment", "false" ] } ] }, { "ch": "What is the difference between a packing and a gasket?", "ansGr": [ { "ans": [ "A parking used internally on a sliding or moving assembly and a gasket used between non-moving", "true" ] }, { "ans": [ "A parking used between non-moving and a gasket used internally on a sliding or moving assembly", "false" ] }, { "ans": [ "A parking used as static (stationary) seals between two flat surfaces and a gasket used between moving parts", "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": "M11.12 ATA 30", "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": "Which are effected of ice to aircraft?", "ansGr": [ { "ans": [ "It decreases the amount of lift and cause unbalancing of the aircraft, making it hard to control", "true" ] }, { "ans": [ "It decreases the amount of lift and not affected to balancing of the aircraft, making it hard to control", "false" ] }, { "ans": [ "It increases the amount of lift and cause unbalancing of the aircraft, making it hard to control", "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": "Anti-icing equipment is turned on", "ansGr": [ { "ans": [ "Before entering icing conditions", "true" ] }, { "ans": [ "After entering icing conditions", "false" ] }, { "ans": [ "As soon as entering icing conditions", "false" ] } ] }, { "ch": "De-icing equipment is designed to remove ice", "ansGr": [ { "ans": [ "After it begins to accumulate typically on the wings and stabilizer leading edges", "true" ] }, { "ans": [ "Before it begins to accumulate typically on the wings and stabilizer leading edges", "false" ] }, { "ans": [ "As soon as it begins to accumulate typically on the wings and stabilizer leading edges", "false" ] } ] }, { "ch": "Basiclly, to prevent and remove ice, heating the surfaces with", "ansGr": [ { "ans": [ "Hot air", "true" ] }, { "ans": [ "Cold air", "false" ] }, { "ans": [ "Ramp air", "false" ] } ] }, { "ch": "What prerequisite is required for auto anti-ice activation?", "ansGr": [ { "ans": [ "Aircraft must be airborne with switches on AUTO", "true" ] }, { "ans": [ "Ambient temperature must be < −20 °C", "false" ] }, { "ans": [ "Both engines have completed start", "false" ] } ] }, { "ch": "If a single probe-heat cycle lasts 16 seconds, what system action is expected?", "ansGr": [ { "ans": [ "Engine inlet anti-ice (EAI) activates automatically", "true" ] }, { "ans": [ "Heater turns off and no icing signal is sent", "false" ] }, { "ans": [ "Wing anti-ice (WIA) activates immediately", "false" ] } ] }, { "ch": "What occurs if the probe vibration does not return to its normal rate after 25 seconds?", "ansGr": [ { "ans": [ "Heater off and fault annunciation", "true" ] }, { "ans": [ "Heater stays on until recovered", "false" ] }, { "ans": [ "WIA (Wing Anti-ice) engages automatically", "false" ] } ] }, { "ch": "How does the system detect the presence of ice on the probe?", "ansGr": [ { "ans": [ "Through a decrease in the probe’s vibration frequency", "true" ] }, { "ans": [ "Using infrared temperature differential", "false" ] }, { "ans": [ "By measuring ambient humidity changes", "false" ] } ] }, { "ch": "The most common means for de-icing wings and stabilizers on small turbine powered aircraft and reciprocating engine aircraft", "ansGr": [ { "ans": [ "Is with pneumatic de-ice boots", "true" ] }, { "ans": [ "Is with hot water", "false" ] }, { "ans": [ "Is with chemical fluid", "false" ] } ] }, { "ch": "Where have inflatable boots attached to them", "ansGr": [ { "ans": [ "The leading edges of the wings and stabilizers", "true" ] }, { "ans": [ "The engine intake and fan blades", "false" ] }, { "ans": [ "The radom and windows", "false" ] } ] }, { "ch": "Where is the source supplies the air to inflate the boots?", "ansGr": [ { "ans": [ "Bleed air", "true" ] }, { "ans": [ "The vacuum", "false" ] }, { "ans": [ "Ramp air", "false" ] } ] }, { "ch": "How to deflate the boots?", "ansGr": [ { "ans": [ "By vacuum suction", "true" ] }, { "ans": [ "Discharge overboard", "false" ] }, { "ans": [ "Open the valves", "false" ] } ] }, { "ch": "The de-icer boot air cells are connected to system pressure and vacuum lines by", "ansGr": [ { "ans": [ "Non-kinking flexible hose", "true" ] }, { "ans": [ "Non-kinking flexible tube", "false" ] }, { "ans": [ "Kinking flexible hose", "false" ] } ] }, { "ch": "Reciprocating engine aircrafts are commonly equipped with pneumatic de-icer systems which are", "ansGr": [ { "ans": [ "The rubber boots", "true" ] }, { "ans": [ "The metal boots", "false" ] }, { "ans": [ "The wooden boots", "false" ] } ] }, { "ch": "A distributor valve is a multi-position control valve controlled by", "ansGr": [ { "ans": [ "The timer", "true" ] }, { "ans": [ "The on-off switch", "false" ] }, { "ans": [ "The manifold", "false" ] } ] }, { "ch": "Prior to securing a leading edge de-icing boot you must", "ansGr": [ { "ans": [ "Remove all paint", "true" ] }, { "ans": [ "Paint the surface", "false" ] }, { "ans": [ "Shave rivet to prevent further abrasion", "false" ] } ] }, { "ch": "A deicer boot is completely bonded to the leading edge to", "ansGr": [ { "ans": [ "Prevent electrical static build up", "true" ] }, { "ans": [ "Provide smoother airflow over leading edge", "false" ] }, { "ans": [ "Provide more efficient deicer cycles", "false" ] } ] }, { "ch": "How long the boots are inflated for one cycle?", "ansGr": [ { "ans": [ "Most boots are inflated for 6 to 8 seconds", "true" ] }, { "ans": [ "Most boots are inflated for 6 to 8 minutes", "false" ] }, { "ans": [ "Most boots are inflated for 6 to 8 hours", "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": "Light, dry snow in subzero temperatures should be blown off whenever possible; the use of hot air is", "ansGr": [ { "ans": [ "Not recommended", "true" ] }, { "ans": [ "Recommended", "false" ] }, { "ans": [ "Only method", "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": "Where can use the engine bleed air for anti-icing in genenal?", "ansGr": [ { "ans": [ "The leading edges of the wing", "true" ] }, { "ans": [ "The probes and drainmast", "false" ] }, { "ans": [ "The windows and windshields", "false" ] } ] }, { "ch": "Where are chemical anti-icing used in some aircraft?", "ansGr": [ { "ans": [ "To anti-ice the leading edges of the wing, stabilizers, windshields, and propellers", "true" ] }, { "ans": [ "To anti-ice the engine intake, enigne core, fan blades,, gearbox", "false" ] }, { "ans": [ "To anti-ice the windshear, windows, static ports, pitot tubes, ice detectors", "false" ] } ] }, { "ch": "Where is the anti-freeze solution pumped from?", "ansGr": [ { "ans": [ "A reservoir", "true" ] }, { "ans": [ "A water tank", "false" ] }, { "ans": [ "The ground", "false" ] } ] }, { "ch": "How does the liquid flows over the wing and tail surfaces, preventing the formation of ice as it flows.", "ansGr": [ { "ans": [ "By a switch in the cockpit,", "true" ] }, { "ans": [ "By automatic system", "false" ] }, { "ans": [ "By a switch in the cabin", "false" ] } ] }, { "ch": "What must do before dispatch when aircraft surfaces are contaminated by frozen moisture?", "ansGr": [ { "ans": [ "They must be deiced prior to dispatch", "true" ] }, { "ans": [ "They must be anti-iced prior to dispatch", "false" ] }, { "ans": [ "They have to delay that flight some hours", "false" ] } ] }, { "ch": "What is purpose of the engine inlet anti-ice?", "ansGr": [ { "ans": [ "It is extremely important that ice not be allowed to build on the engine inlet cowl", "true" ] }, { "ans": [ "It is extremely important that ice not be allowed to build on the whole engine", "false" ] }, { "ans": [ "It is extremely important that ice not be allowed to build on the engine core", "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": "Windshield heating provides", "ansGr": [ { "ans": [ "Impact resistance enhancement", "true" ] }, { "ans": [ "Thermal expansion for a tighter fit", "false" ] }, { "ans": [ "Increases strength to resist cabin pressure", "false" ] } ] }, { "ch": "Windscreen heating is supplied from", "ansGr": [ { "ans": [ "Frequency wild generator, direct to the windscreen", "true" ] }, { "ans": [ "DC generator, via a transformer", "false" ] }, { "ans": [ "Frequency wild generator, via a rectifier", "false" ] } ] }, { "ch": "How much temperature of the wing leading edge reaches when temperature switches turn ON the operation light above the switch", "ansGr": [ { "ans": [ "Approximately +140 °F", "true" ] }, { "ans": [ "Approximately +212 °F", "false" ] }, { "ans": [ "Approximately +350 °F", "false" ] } ] }, { "ch": "When the red WING OVHT warning light on the annunciator panel illuminates?", "ansGr": [ { "ans": [ "Temperature in the wing leading edge exceeds approximately +212 °F (outboard) or +350 °F (inboard)", "true" ] }, { "ans": [ "Temperature in the wing leading edge exceeds approximately +80 °F (outboard) or +140 °F (inboard)", "false" ] }, { "ans": [ "Temperature in the wing leading edge exceeds approximately +400 °F (outboard) or +500 °F (inboard)", "false" ] } ] }, { "ch": "The joined sections of ducting are hermetically sealed by", "ansGr": [ { "ans": [ "Sealing rings", "true" ] }, { "ans": [ "Metal rings", "false" ] }, { "ans": [ "Titanium rings", "false" ] } ] }, { "ch": "Where can find the rate of leakage at a given pressure should not exceed limit?", "ansGr": [ { "ans": [ "AMM", "true" ] }, { "ans": [ "SRM", "false" ] }, { "ans": [ "IPC", "false" ] } ] }, { "ch": "A wing thermal anti-ice annunciator is illuminated permanently in flight deck without selection being made. The most probable cause would be", "ansGr": [ { "ans": [ "A short circuit", "true" ] }, { "ans": [ "An open circuit", "false" ] }, { "ans": [ "A normal", "false" ] } ] }, { "ch": "Ice formation on wings is due to.", "ansGr": [ { "ans": [ "Supercooled water changing state on contact with the wing", "true" ] }, { "ans": [ "Ice crystals forming layers on contact with the wing", "false" ] }, { "ans": [ "Suspended ice crystals melting on contact with the wing and instantly freezing", "false" ] } ] }, { "ch": "Air leaks can often be detected by", "ansGr": [ { "ans": [ "A soap-and-water solution", "true" ] }, { "ans": [ "The pressure sensors", "false" ] }, { "ans": [ "Feeling by hand", "false" ] } ] }, { "ch": "Lagging or insulating blankets must be checked for security and must be free of", "ansGr": [ { "ans": [ "Flammable fluids", "true" ] }, { "ans": [ "Contaminations", "false" ] }, { "ans": [ "Chemicals", "false" ] } ] }, { "ch": "What kind of the duct using in wing 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", "true" ] }, { "ans": [ "The Bleed air computer", "false" ] }, { "ans": [ "The warning computer", "false" ] } ] }, { "ch": "The WAI valves stay closed as long as the operational mode inhibit is active", "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": "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": "Ground de-icing of an aircraft is performed by", "ansGr": [ { "ans": [ "A ground crew", "true" ] }, { "ans": [ "A cabin crew", "false" ] }, { "ans": [ "The representative", "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": "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": "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": "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" ] } ] } ]