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Aeroplane Systems
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Questions in this quiz (62)
1A pneumatic icing system:
- AIs an anti-icing system that uses bleed air from the engines
- BIs a de-icing system that uses turbine bleed air from the engines
- CIs an anti-icing system that uses rubber boots
- DIs a de-icing system that uses rubber boots
2A TRU (transformer–rectifier unit):
- AConverts AC into a lower DC voltage
- BConverts AC into DC
- CConverts DC into AC
- DConverts AC into a higher DC voltage
3A typical autothrust system has three modes of operation:
- AEPR control, Mach speed, and speed control
- BEPR control, TAS hold, and speed control
- CEPR control, Mach hold, and speed control
- DThrust control, Mach hold, and speed control
4An artificial control feel is also known as
- AS feel
- BQ feel
- CR feel
- DA feel
5An inverter:
- AConverts AC into a higher DC voltage
- BConverts DC into AC
- CConverts AC into a lower DC voltage
- DConverts AC into DC
6BCF-type extinguishers are used on what classes of fires?
- AB, D, F
- BB, C, F
- CA, B, F
- DA, B, C
7Choose the correct statement.
- AThe major difference between hydraulics and pneumatics is that fluid is compressible while air is not.
- BPneumatics utilises pressurised fluid to generate motion in an actuator.
- CPneumatics utilises pressurised gas to generate motion in an actuator.
- DPneumatics is used in components or systems that require precise control.
8Choose the most correct statement.
- APressurised oxygen tanks are coloured blue and contain aviation oxygen.
- BPressurised oxygen tanks are coloured black and contain aviation oxygen.
- CPressurised oxygen tanks are coloured green and contain aviation oxygen.
- DPressurised oxygen tanks are coloured white and contain aviation oxygen.
9Choose the most correct statement.
- AOxygen generators use a chemical reaction within the unit to produce a steady supply of breathable oxygen.
- BOxygen generators use a chemical—typically sodium nitrate—which is ignited by an electrical trip switch.
- COxygen generators use a generator within the unit to produce a steady supply of breathable oxygen.
- DOxygen generators use a chemical—typically sodium nitrate—which is ignited by a percussion cap.
10Class B fires are ones that involve:
- AFlammable liquids such as petroleum, oils, paints, etc.
- BElectrical fires such as household appliances, computers, transformers, etc.
- COrdinary combustibles such as wood, cloth, paper, etc.
- DFlammable gases such as propane, butane, and methane
- ECombustible metals such as magnesium, sodium, and potassium
11How is brake temperature indicated to the pilots?
- AThere are brake temperature indicators in the cockpit.
- BSmall pins protruding from the piston housing assembly on the brake units show the degree of temperature.
- CThere are no indicators for brake temperature, as there is no need to have them.
- DBrake temperature indicators on the wheel calipers change colour to indicate temperature.
12How is brake wear indicated to pilots?
- AA warning light is illuminated in the wheelwell when the brake pads get below a certain performance value.
- BSmall pins protruding from the piston housing assembly on the brake units show the degree of wear.
- CThere is no indication of brake wear. Brakes are replaced every 100 hr regardless of condition.
- DA warning light is illuminated in the cockpit when the brake pads get below a certain performance value.
13How is refuelling done on large commercial airliners, such as the B777?
- AOverwing, where the tanks are fuelled from above
- BPressure refuelling via a single-point nozzle so that each tank can be filled at the same time
- COverwing via a single-point nozzle so that each tank can be filled at the same time
- DPressure refuelling via a single-point nozzle on each wing so that each tank can be filled separately
14How is the cabin pressurised?
- AThe pressure inside a pressurised cabin is created through the removal of compressed air—normally sourced from an air compressor and distributed by the air conditioning system.
- BThe pressure inside a pressurised cabin is created through the injection of compressed air—normally sourced from an air compressor and distributed by the air conditioning system.
- CThe pressure inside a pressurised cabin is created through the injection of compressed air—normally sourced from bleed air taken from the engine compressor stages and distributed by the air conditioning system.
- DThe pressure inside a pressurised cabin is created through the removal of compressed air—normally sourced from bleed air taken from the engine compressor stages and distributed by the air conditioning system.
15If a FADEC failed, what would happen?
- AA displayed warning would tell pilots to activate the manual override function.
- BThe engine would flame out but could be restarted via a manual override.
- CA displayed warning would indicate to pilots that the system has automatically switched to the manual override function.
- DThe engine would fail, but there is a manual override to prevent the engine flaming out.
- EThe engine would fail. There is no manual override.
16In fuel tanks, what are baffles used for?
- ATo vent the tanks and prevent a vacuum
- BTo take the weight of the fuel off the structure itself
- CTo prevent fuel from surging around
- DTo enhance the structural integrity of the fuselage
17In reference to a fail passive autoland system:
- AFollowing a system failure, there is no significant out-of-trim condition, nor has the aircraft deviated from the flight path significantly, and the landing is not completed automatically. This means that, in the event of a failure, the failed system will not present the aircraft to the pilot in a seriously out-of-trim situation and hasn't deviated seriously from the localiser, glideslope, or target airspeed. If the system fails, the pilot assumes control of the aircraft. This system requires at least two autopilots to be engaged in the autoland mode.
- BIn the event of a failure below alert height, the approach, flare, and landing can still be completed by the remaining part of the automatic system. If the system were to fail, it would simply revert to being a fail-operational system. For a system to be fail-operational, it must have some degree of redundancy. This redundancy is achieved by incorporating three or more independent autopilot channels, all of which are engaged for autoland. This means that if one channel should fail, the autoland can still proceed without compromising the ability to complete a full automatic landing.
- CFollowing a system failure, there is no significant out-of-trim condition, nor has the aircraft deviated from the flight path significantly, and the landing is not completed automatically. This means that, in the event of a failure, the failed system will not present the aircraft to the pilot in a seriously out-of-trim situation and hasn't deviated seriously from the localiser, glideslope, or target airspeed. If the system fails, the pilot assumes control of the aircraft. This system requires at least three autopilots to be engaged in the autoland mode.
- DIn the event of a failure below alert height, the approach, flare, and landing can still be completed by the remaining part of the automatic system. If the system were to fail, it would simply revert to being a fail-passive system. For a system to be fail-operational, it must have some degree of redundancy. This redundancy is achieved by incorporating three or more independent autopilot channels, all of which are engaged for autoland. This means that if one channel should fail, the autoland can still proceed without compromising the ability to complete a full automatic landing.
18In reference to a fail-operational system:
- AAn autoland system is considered to be of the fail-operational type if, following a system failure, there is no significant out-of-trim condition, nor has the aircraft deviated from the flight path significantly, and the landing is not completed automatically. This means that, in the event of a failure, the failed system will not present the aircraft to the pilot in a seriously out-of-trim situation, and hasn't deviated seriously from the localiser, glideslope, or target airspeed. If the system fails, the pilot assumes control of the aircraft. This system requires at least one autopilot to be engaged in the autoland mode.
- BIn the event of a failure below alert height, the approach, flare, and landing can still be completed by the remaining part of the automatic system. If the system were to fail, it would simply revert to being a fail-passive system. For a system to be fail-operational, it must have some degree of redundancy. This redundancy is achieved by incorporating three or more independent autopilot channels, all of which are engaged for autoland. This means that if one channel should fail, the autoland can still proceed without compromising the ability to complete a full automatic landing.
- CIn the event of a failure below alert height, the approach, flare, and landing can still be completed by the remaining part of the automatic system. If the system were to fail, it simply reverts to being a fail-passive system. For a system to be fail-operational, it must have some degree of redundancy. This redundancy is achieved by incorporating two or more independent autopilot channels, all of which are engaged for autoland. This means that if one channel should fail, the autoland can still proceed without compromising the ability to complete a full automatic landing.
- DAn autoland system is considered to be of the fail-operational type if, following a system failure, there is no significant out-of-trim condition, nor has the aircraft deviated from the flight path significantly, and the landing is not completed automatically. This means that, in the event of a failure, the failed system will not present the aircraft to the pilot in a seriously out-of-trim situation and hasn't deviated seriously from the localiser, glideslope, or target airspeed. If the system fails, the pilot assumes control of the aircraft. This system requires at least two autopilots to be engaged in the autoland mode.
19Inputs to the flight director are:
- ABarometric altitude, heading, reference gyros, radio – VOR/ILS, compass reference
- BBarometric altitude, heading, reference gyros
- CBarometric altitude, radio – VOR/ILS, compass reference
- DElectronic altitude, heading, reference gyros, radio – VOR/ILS, compass reference
20Larger aircraft use air from which three sources?
- ABleed air from the engines, ground equipment, air conditioning
- BBleed air from the air conditioning, APU, outside air
- CBleed air from the engines, APU, air conditioning
- DBleed air from the engines, APU, ground equipment
21Name the four types of oxygen distribution systems.
- AContinuous-flow, on-demand, pressure-demand, diluter-demand
- BContinuous-demand, on-demand, pressure-diluter, diluter-demand
- CContinuous-demand, on-demand diluter, pressure-diluter, diluter-demand
- DContinuous-flow, on-demand, pressure-diluter, diluter-demand
22Name the types of anti-icing/de-icing systems.
- ABleed air, pneumatic, demister, electrical
- BBleed air, chemical, demister, electrical
- CBleed air, chemical, pneumatic, electrical
- DBleed air, pneumatic, demister, chemical
23Name the types of mechanical or electrical fuel pumps.
- AEngine-driven pump, fuel-boost pump, submersible fuel pump
- BEngine-driven pump, fuel-boost pump, submersible fuel pump, jet pump
- CEngine-driven pump, fuel-boost pump, jet pump
- DEngine-driven pump, submersible fuel pump, jet pump
24Nonreturn valves:
- AAre nonmechanical fuel pumps
- BAllow fuel to flow in only one direction
- CAllow fuel to flow in all directions
- DFilter the fuel from contaminants
25Pneumatics are advantageous over hydraulics because:
- APneumatic systems are lighter in weight.
- BThe pressure is transmitted much more efficiently than with hydraulics.
- CAs the power delivery isn't as accurate as with an air-based system, hydraulics are not used in components or systems that require precise control.
- DSince the fluid in the aircraft systems (normally compressed liquid) is compressible, it would require much more pressure to generate the same force as a comparative pneumatic system. This would mean that large accumulators would be required, which is not practical in aircraft. As the power delivery isn't as accurate as with a fluid-based system, pneumatics are not used in components or systems that require precise control.
26Pneumatics is commonly used for:
- AAir conditioning and pressurisation, wing and engine anti-ice, water tank pressurisation
- BAir conditioning and pressurisation, elevator control, windscreen demist, cargo compartment heating, rudder actuation, water tank pressurisation
- CAir conditioning and pressurisation, windscreen demist, cargo compartment heating, water tank pressurisation, engine ground start, rudder control
- DAir conditioning and pressurisation, windscreen demist, cargo compartment heating, rudder actuation, water tank pressurisation
27Power-assisted controls are controls that:
- ADo not remove control feedback but simply apply additional force on the control surface when commanded by a pilot control input
- BRemove the control feedback when commanded by a pilot control input
- CDo not enable the pilot to 'feel' what the controls are doing, and therefore what the aircraft is doing, through his/her manipulation
- DEnable the pilot to 'feel' what the controls are doing, and therefore what the aircraft is doing, through his/her manipulation
28Safety locks on landing gear are used to:
- APrevent either inadvertent extension or retraction
- BPrevent inadvertent retraction
- CAssist in wheel steering
- DPrevent inadvertent extension
29Select the correct statement.
- AAll of these are correct
- BMovement or rotation around the lateral axis is called roll.
- CMovement or rotation around the normal, or vertical axis is called yaw.
- DMovement or rotation around the longitudinal axis is called pitch.
30Select the correct statement.
- AAilerons, rudder, and elevator are the primary flight controls.
- BFlaps, slats, spoilers, trim tabs, and rudder are the secondary flight controls.
- CAilerons, rudder, elevator, and flaps are the primary flight controls.
- DFlaps, slats, spoilers, rudder, aileron, and trim tabs are the secondary flight controls.
31Select the most correct statement.
- AAn air-cycle machine uses the same principle as any household refrigerator. A liquid refrigerant with a low boiling point (typically freon, 3°C) is circulated around a closed-loop system.
- BAn air-cycle machine uses the property of gases so that when the pressure of a volume of gas is reduced, the temperature is also reduced.
- CVapour-cycle machines use the same principle as any household refrigerator. A liquid refrigerant with a low boiling point (typically freon, 30°C) is circulated around a closed-loop system.
- DA vapour-cycle machine uses the property of gases so that when the pressure of a volume of gas is reduced, the temperature is also reduced.
32Select the most correct statement.
- AWindscreens are heated in a similar way to the back windows of most cars; in an aircraft's case, the heating elements are sandwiched between two different layers of the windscreen material.
- BSome aircraft also utilise rain-repellent fluid that can aid the wipers in getting rid of excess water.
- CAircraft are fitted with wiper blades to clear the screens during flight or on the ground.
- DAll of these are correct
33Select the most correct statement.
- AA yaw damper is a device used on many aircraft to damp (reduce) the rolling and yawing oscillations due to Dutch roll.
- BA yaw damper is a device used on many aircraft to damp (reduce) the rolling oscillations due to Dutch roll.
- CA yaw damper is a device used on many aircraft to damp (reduce) the yawing oscillations due to Dutch roll.
- DA yaw damper is a device used on many aircraft to damp (increase) the rolling and yawing oscillations due to Dutch roll.
34Select the most correct statement.
- AIn the EPR mode, the autothrust system identifies the engine with the greatest engine thrust ratio and maintains this according to the EPR limit selected.
- BIn the EPR mode, the autothrust system identifies the engine with the greatest engine output/input ratio and maintains this according to the EPR limit selected.
- CIn the EPR mode, the autothrust system identifies the engine with the greatest TAS and maintains this according to the EPR limit selected.
- DIn the EPR mode, the autothrust system identifies the engine with the greatest engine pressure ratio and maintains this according to the EPR limit selected.
35Select the most correct statement.
- AMach hold mode maintains a selected IAS number and is used during the cruise. This uses inputs received from the central air data computer.
- BMach hold mode maintains a selected Mach number and is used during the cruise. This uses inputs received from the central air data computer.
- CMach hold mode maintains a selected TAS and is used during the cruise. This uses inputs received from the central air data computer.
- DMach hold mode maintains a selected Mach number and is used during the landing phase. This uses inputs received from the central air data computer.
36Select the most correct statement(s). (Select one or more.)
- AThe structural part of the aircraft that contains the pressure is called the pressure tube.
- BOnly the flight deck, passenger areas, and main cargo holds are pressurised.
- CThe structural part of the aircraft that contains the pressure is called the pressure hold.
- DThe entire aircraft is pressurised.
37Select the most correct statement(s). Select one or more.
- AContinuous-loop detectors consists of wires that become conductive once a certain temperature is reached.
- BSpot detectors consists of wires that become conductive once a certain temperature is reached.
- CSmoke detectors work on the principle of a thermocouple or bimetallic switch.
- DContinuous-loop detectors work on the principle of a thermocouple or bimetallic switch.
38The device that manages the pressure is the:
- AAir pressure controller
- BCabin controller
- CCabin pressure controller
- DPressure controller
39The disadvantages of oxygen generators are: (Select one or more.)
- AThey are a quick and effective way to supply oxygen to crew or passengers.
- BThey generate a lot of heat.
- CThe oxygen supply is limited.
- DThe bottles add weight.
- EThey cannot be turned off once activated.
40The fire bell warning is inhibited during critical phases of flight, such as during takeoff, from ________ to ________.
- AV1, 200 ft or 20 sec
- BVR, 300 ft or 30 sec
- CVR, 400 ft RA or 20 sec
- DV1, 400 ft RA or 30 sec
41The four degrees of urgency for the master warning system, in order, are:
- A(1) warnings (2) cautions (3) advisories (4) status messages
- B(1) warnings (2) cautions (3) status messages (4) advisories
- C(1) warnings (2) status messages (3) cautions (4) advisories
- D(1) cautions (2) warnings (3) advisories (4) status messages
42Tyre creep is:
- AThe slipping of the tyre on the rim
- BThe rubber deposits left on the runway from aircraft landing at low speeds
- CThe rubber deposits left on the runway from aircraft landing
- DThe rubber deposits left on the runway from aircraft landing at high speeds
43What are hydraulic fuses used for?
- ATo help the hydraulic pump under peak pressure loads
- BTo allow hydraulic fluid to flow in only one direction
- CTo prevent the sudden loss of pressure within a system
- DAs a storage container for the hydraulic fluid within a system
44What are the advantages of a hydraulic system?
- AAllows actuation of large control surfaces with minimal input; greater, more efficient and consistent power delivery compared to electric motor of the same size; leaks in the system are easy to detect; the high pressure within a hydraulic system requires a strong structure to handle the heavy lines and hoses
- BAllows actuation of large control surfaces with minimal input; hydraulic fluid is corrosive to many aircraft systems; leaks in the system are difficult to detect; able to still work when under high-temperature conditions
- CAllows actuation of large control surfaces with minimal input; greater, more efficient and consistent power delivery compared to electric motor of the same size; leaks in the system are easy to detect; able to still work when under high-temperature conditions
- DAllows actuation of large control surfaces with minimal input; greater, more efficient and consistent power delivery compared to electric motor of the same size; any leaks in the system will require backup systems to take up the load, adding extra weight; able to still work when under high-temperature conditions
45What are the properties of hydraulic fluid?
- AIncompressibility (the most important property); low viscosity; good lubrication; flammability; nontoxicity; low freezing point; high boiling point; no foaming; stability; no decomposition or waxing; colour
- BIncompressibility (the most important property); low viscosity; good lubrication; nonflammability; nontoxicity; low freezing point; high boiling point; no foaming; stability; no decomposition or waxing; colour
- CIncompressibility (the most important property); low viscosity; good lubrication; nonflammability; nontoxicity; low freezing point; low boiling point; no foaming; stability; no decomposition or waxing; coloured
- DIncompressibility (the most important property); low viscosity; good lubrication; nonflammability; toxicity; low freezing point; high boiling point; no foaming; stability; no decomposition or waxing; colour
46What sort of redundancy do most large aircraft have for their hydraulic systems?
- AThree independent systems
- BTwo independent systems
- COne independent system plus a RAT
- DOne independent system
47What type of fire extinguisher is the preferred type to use on brake fires?
- ADry powder (red with a white band)
- BBCF (red with a yellow band)
- CCarbon dioxide (red with a black band)
- DWater (coloured red)
- EFoam-type extinguishers (red with a blue band)
48Which of the following is a disadvantage of having multiple wheels on a set of bogies?
- AThe aircraft weight is spread over a larger area of load distribution.
- BThe smaller turning radius reduces tire wear.
- CThe extra weight reduces braking efficiency.
- DMore moving parts require more maintenance.
49Which of the following is a type of ice-detection system?
- ALoading probe
- BTorque probe
- CTAT probe
- DTorque-loading probe
50Which of the following statements is most correct about the primary purpose of the master warning system?
- AInforms the flight crew of impending danger via a visual alert
- BGets the attention of the crew and alerts them that a problem exists somewhere
- CAlerts the crew that a problem exists via aural and visual alerts
- DGets the attention of the crew, alerts them that a problem exists, and directs them to the problem area
51Three fully charged 8 V, 250 Ah batteries are connected in series. If the circuit is producing a load of 24 V and 75 Ah, how long can the batteries power the circuit?
- A10 hours
- B3.3 hours
- C3 hours
- D5.3 hours
52Two fully charged 24 V, 350 Ah batteries are connected in parallel. If the circuit is producing a load of 24 V and 100 Ah, how long can the batteries power the circuit?
- A3.5 hours
- B7 hours
- C1 hour
- D5 hours
53A fully charged 24 V, 300 Ah battery is wired in a circuit producing a load of 24 V and 100 W, how long can the batteries power the circuit?
- A72 hours
- B3 hours
- C1 hours
- D24 hours
54Two fully charged 12 V, 325 Ah batteries are connected in series. If the circuit is producing a load of 24 V and 65 W, how long can the batteries power the circuit?
- A120 hours
- B240 hours
- C8 hours
- D100 hours
55Four fully charged 24 V, 100 Ah batteries are connected in parallel. If the circuit is producing a load of 24 V and 110 W, how long can the batteries power the circuit?
- A3.5 hours
- B15 hours
- C87 hours
- D90 hours
56Class A fires are ones that involve:
- AFlammable liquids such as petroleum, oils, paints, etc.
- BElectrical fires such as household appliances, computers, transformers, etc.
- COrdinary combustibles such as wood, cloth, paper, etc.
- DFlammable gases such as propane, butane, and methane
- ECombustible metals such as magnesium, sodium, and potassium
57Class C fires are ones that involve:
- AFlammable liquids such as petroleum, oils, paints, etc.
- BElectrical fires such as household appliances, computers, transformers, etc.
- COrdinary combustibles such as wood, cloth, paper, etc.
- DFlammable gases such as propane, butane, and methane
- ECombustible metals such as magnesium, sodium, and potassium
58Class D fires are ones that involve:
- AFlammable liquids such as petroleum, oils, paints, etc.
- BElectrical fires such as household appliances, computers, transformers, etc.
- COrdinary combustibles such as wood, cloth, paper, etc.
- DFlammable gases such as propane, butane, and methane
- ECombustible metals such as magnesium, sodium, and potassium
59Select the most correct statement.
- AA vapour-cycle machine uses the same principle as any household refrigerator. A liquid refrigerant with a low boiling point (typically freon, which boils at -3°C) is circulated around a closed-loop system.
- BAn air-cycle machine uses the property of gases so that when the pressure of a volume of gas is reduced, the temperature is increased
- CVapour-cycle machines use the same principle as any household refrigerator. A liquid refrigerant with a low boiling point (typically freon, which boils at 30°C) is circulated around a closed-loop system.
- DA vapour-cycle machine uses the property of gases so that when the pressure of a volume of gas is reduced, the temperature is also reduced.
60Select the most correct statement(s). Select one or more.
- ASpot detectors consist of wires that become conductive once a certain temperature is reached.
- BSmoke detectors work on the principle of a thermocouple or bimetallic switch, where two different metals with different properties are in contact.
- CSpot detectors work on the principle of a thermocouple or bimetallic switch, where two different metals with different properties are in contact.
- DContinuous-loop detectors work on the principle of a thermocouple or bimetallic switch, where two different metals with different properties are in contact.
61Root Mean Square (RMS) = to calculate the power available in an AC system, you simply take the _____ current/voltage value and multiply it by ______
- APeak, 0.707
- BPeak, 0.717
- CLowest, 7.07
- DLowest, 0.707
62Spiral instability refers to a combination of ____ lateral stability and ____ directional stability.
- AWeak, Strong
- BStrong, Weak
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- ATPL Systems and Performance (Aeroplane Systems) Quiz on Aeroplane Systems, created by Andrew Lee on 10/09/2016.
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