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Q400 > Engines > Flashcards

Engines Flashcards

1
Q

What is the shaft horsepower of each engine under normal takeoff conditions?

A

4,580

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2
Q

What does the shaft horsepower increase to on the operating engine in the event of an engine failure after takeoff?

A

5,071

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3
Q

True or False: Propeller movement is accomplished by the turning of power turbines.

A

True

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4
Q

Where is the accessory gearbox mounted on the aircraft?

A

The High Pressure Compressor

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5
Q

True or False: The low pressure (axial) compressors are driven by their associated low pressure turbine.

A

True

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6
Q

Which of the following represents the speed of the low pressure axial compressor?

A

NL

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7
Q

Which of the following represents the speed of the high pressure centrifugal compressor?

A

NH

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8
Q

What powers the power turbines?

A

Combustion Gasses (exhaust gas)

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9
Q

When on the ground and the propellers are in the ground range of beta, it is indicated by:

A

Propeller Ground Range advisory lights

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10
Q

True or False: The propeller has a beta range used for reverse thrust on the ground.

A

True

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11
Q

What is the purpose of the engine bypass doors?

A

Prevents solid contaminants from entering the engine

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12
Q

When should the engine bypass doors be selected open?

A

In icing conditions or operating on contaminated runways

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13
Q

When should the engine bypass doors be open?

A

In icing conditions or operating on contaminated runways

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14
Q

True or False: The auxiliary fuel pump is powered by the accessory gear box.

A

False

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15
Q

True or False: The engine driven fuel pump is attached to the accessory gearbox.

A

True

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16
Q

True or False: The oil pump is attached to the accessory gearbox.

A

True

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17
Q

True or False: The DC starter generator is attached to the accessory gear box.

A

True

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18
Q

True or False: The permanent magnet alternator is attached to the accessory gearbox.

A

True

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19
Q

True or False: The FADEC is the primary computer for engine control.

A

True

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20
Q

What powers the FADEC?

A

PMA (Permanent Magnetic Alternator), Nh >20%

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21
Q

What provides an alternate power source for the FADEC during engine starting or if a PMA failure occurs?

A

DC Essential buses

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22
Q

When the condition levers are set to the 1020 RPM detent, what do they command the FADEC to set power to?

A

NTOP

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23
Q

When the condition levers are set to the 900 RPM detent, what do they command the FADEC to set power to?

A

MCL

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24
Q

When the condition levers are set to the 850 RPM detent, what do they command the FADEC to set power to?

A

MCR

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25
Q

What prop speed is automatically set when in the over-travel range?

A

1020 RPM

125% TRQ

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26
Q

What must pilots do to enter the ground beta range?

A

Raise the gate release triggers and move the levers aft

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27
Q

True or False: When in MAX REV, propeller RPM is limited.

A

True

660 RPM

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28
Q

True or False: In order for uptrim to be armed, the power levers must be high and torque on both engines must be at least 50 %.

A

True

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29
Q

When is uptrim triggered?

A

Torque on failed engine falls below 25%

Or

NP falls below 80%

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30
Q

What does the FADEC limit torque to in reverse mode?

A

35%

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31
Q

What does the FADEC limit torque to when it is in the forward range?

A

106%

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32
Q

What does the FADEC limit transient torque to when it is in the overtravel range?

A

135%

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33
Q

True or False: There is independent engine overspeed protection built into the FADEC and it has the capability of cutting off fuel flow during NH overspeeds.

A

True

34
Q

True or False: The FADEC fault classes are critical, cautionary, and advisory.

A

True

35
Q

True or False: The FADEC fault classes are warning, advisory, and normal.

A

False

36
Q

What does a green arc on the engine gauges mean?

A

Normal Operating Range

37
Q

What does the yellow arc on the engine gauges mean?

A

Caution Range

38
Q

What does the red dash on the engine gauges mean?

A

Minimum or Maximum Value

39
Q

What color does the needle change to when the engine gauge needle enters the cautionary range?

A

Yellow

40
Q

What color does the needle change to when the engine gauge is in the green arc?

A

White

41
Q

What happens if the data becomes invalid for either engine gauge?

A

Digital values changes to white dashes gauge turns white, Needle removed

42
Q

How is Torque (TRQ) displayed on the Engine Display?

A

Displayed as a percentage of maximum power

43
Q

True or False: NH is shown in both analog and digital format on the Engine Display.

A

True

44
Q

True or False: NL is shown in both analog and digital format on the Engine Display.

A

False

45
Q

True or False: The oil indications on the Engine Display show both oil temperature and oil pressure.

A

True

46
Q

True or False: The oil indications on the Engine Display show both oil temperature and oil pressure.

A

True

47
Q

True or False: Power lever AND Condition lever positions are communicated to the FADEC to determine the appropriate fuel schedule to the engines.

A

True

48
Q

True or False: The engine ignition system is controlled automatically by the FADEC.

A

True

49
Q

At about what PSI will the #1 or #2 ENG OIL PRESS warning light illuminate?

A

44-50 psi

50
Q

True or False: The oil is cooled by engine intake air.

A

True

51
Q

True or False: The engine oil system lubricates engine bearings, gearboxes, and the landing gear.

A

False

52
Q

True or False: Each propeller is constant-speed and fully feathering and can be operated in the reverse thrust range.

A

True

53
Q

What controls propeller pitch?

A

Pressurized oil from the main engine oil system

54
Q

True or False: Electrical heater elements are bonded to the inner leading edge of every other prop blade for ice protection.

A

False

55
Q

What is the reduction gear box powered by?

A

Engine power turbine

56
Q

True or False: If a PEC failure occurs, the PCU automatically defaults to controlling the minimum blade pitch in flight.

A

True

57
Q

What do the counter weights do when oil pressure is lost in the propeller?

A

Aid in twisting (feathering/coarse pitch) the propeller blades.

58
Q

True or False: The overspeed governor uses a flyweight design to limit propeller overspeed in the event of a malfunction.

A

True

59
Q

Propeller RPM in flight depends on the position of what components?

A
  • Condition levers

- Engine control panel

60
Q

The PCU uses _____ to control propeller blade angle.

A

Engine Oil

61
Q

True or False: Propeller synchrophasing is a manual function.

A

False

62
Q

A failed engine with a wind-milling propeller at low blade angle creates what effect?

A

Drag

63
Q

Which of the following is not a method used for propeller feathering?

A

&laquo_space;Auto Feather, Manual Feather, ALT FTHR&raquo_space;

64
Q

What must engine torque exceed for A/F Select to change to ARM?

A

50%

65
Q

What must the power levers be above for A/F Select to change to ARM?

A

Above 60 Degrees

66
Q

If torque on either engine falls below _____ torque for at least _____ seconds, the PEC commands the propeller to the feather position.

A

25% Torque for at least 3 Seconds

67
Q

True or False: Pilots can use the alternate feather function if the autofeather does not activate properly or is not selected (i.e. in cruise flight).

A

True

68
Q

When is manual feathering most commonly used?

A

Engine shutdown for normal operations

69
Q

When should nacelle intake bypass doors be opened?

A

Icing conditions or contaminated runway

70
Q

FADEC FAIL will ultimately result in which of the following?

A

Shutdown of the power plant

71
Q

In the forward range, propeller pitch _____.

A

is governed to maintain a constant speed

72
Q

If the aircraft is configured properly for an NTOP takeoff and an engine fails, up-trim will automatically accomplish what?

A

Increases the operating engine rate from NTOP to MTOP

73
Q

If an engine instrument digital display changes to dashes, what must be true?

A

The data is no longer valid

74
Q

True or False: Uptrim is dependent on arming the autofeather system.

A

False

75
Q

Which of the following statements regarding the engine-driven fuel pump is most accurate?

A

Is powered by the engine accessory gearboxc

76
Q

With the Ignition switch in NORM, the FADEC activates the ignition circuitry during which of the following?

A

Engine start, Engine surge, & Flameout

77
Q

What is engine oil cooled by?

A

An air cooler

78
Q

How is propeller pitch controlled?

A

PEC Signals the PCU to use engine oil to move a piston in the hub

79
Q

Pushing the ALT FEATHER switchlight will feather the prop _____.

A

Only with the condition levers and Power lever in the appropriate position

80
Q

True or False: In ground range beta, the power levers directly control propeller pitch angle.

A

True

Q400 (31 decks)

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