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Flashcards in B737 Engine & APU - TS Deck (59)
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0
Q
  1. The 700/800/900 APU generator will supply both Transfer buses in flight
A

TRUE

1
Q
  1. What electrical power source is required for starting the APU?
A

Aircraft battery

2
Q
  1. What is the fuel source for starting the APU with only aircraft battery power available? (COLD aircraft)
A

1 fuel tank

3
Q
  1. A 737-800 aircraft is in-flight with APU running. Turning OFF the aircraft BATTERY switch will
A

Cause the APU to shut down

4
Q
  1. What are the initial indications when the APU is starting?
A

LOW OIL PRESSURE light one, full scale negative amps indication on DC ammeter BAT position

5
Q
  1. The New Generation 737 APU generator can be used to supply both Transfer Buses up to what maximum altitude?
A

41,000 feet if no APU bleed air is used

6
Q
  1. What does an illuminated APU MAINT light indicate?
A

Oil quantity is insufficient for extended operation

7
Q
  1. What prevents the APU electrical and bleed air loads from increasing the EGT above acceptable levels?
A

The APU bleed valve modulates toward the closed position

8
Q
  1. What indicates the APU generator is ready for use?
A

When the blue APU GEN OFF BUS light illuminates

9
Q
  1. What is the normal procedure for using APU bleed air after starting the APU?
A

APU bleed air switch may be turned ON after one full minute of APU operation

10
Q
  1. What causes an automatic shutdown of the APU?
A

Fire warning

11
Q
  1. What causes an automatic shutdown of the APU in flight?
A

BAT switch placed to OFF

12
Q
  1. Which of the following causes an automatic shutdown of the APU in flight or on the ground?
A

Fire warning

13
Q
  1. Which sequence of events should be accomplished for normal shutdown of the APU when “securing” the airplane?
A

Operate for one minute with no pneumatic load, place APU switch to OFF, wait 120 seconds, then battery switch OFF

14
Q
  1. Which of the following set of conditions causes the APU OVERSPEED light to illuminate?
A

All answers are correct: APU start abort, APU speed sensing failed-APU shuts down, APU rpm limit exceeded

15
Q
  1. A normal APU start cycle can take as long as:
A

120 seconds

16
Q
  1. Inflight, with one engine generator inoperative, the APU can supply electrical power to:
A

both buses up to 41,000 feet

17
Q
  1. A 737-700 aircraft is parked with APU running. Turning the APU control switch to OFF __________.
A

All answers are correct: closes the APU bleed valve, trips the APU generator field relay, shuts down the APU after 60 sec

18
Q
  1. An illuminated APU “GEN OFF BUS” light indicates:
A

The APU is at operating speed

19
Q
  1. Turning the battery switch to OFF inflight, will cause the APU to shut down
A

TRUE

20
Q
  1. Minimum battery voltage for APU start is:
A

23 volts

21
Q
  1. APU starter engagement may first be observed by:
A

Full scale left deflection of DC ammeter with the BAT position selected

22
Q
  1. After APU shutdown, the battery switch should remain on for 120 seconds after the APU switch has been placed to OFF.
A

TRUE

23
Q
  1. What causes an APU OVERSPEED annunciator light to illuminate?
A

All of these answers are correct: APU rpm exceeds limits, APU auto start sequence is aborted, over speed shutdown protection is inop during APU shutdown

24
Q
  1. An illuminated APU DET INOP light when no fire warning test is being performed:
A

Requires the APU to be shut down if operating because the detectors is inop

25
Q
  1. After an inflight APU start, the APU will supply ___________.
A

Pneumatic load only up to 17,000 feet

26
Q
  1. The maximum allowable EGT for the APU is ______.
A

There is none

27
Q
  1. After aborting an APU start, how soon may another start be attempted?
A

After 3rd attempt 15 minutes

28
Q
  1. Successful APU starts are not assured above ___________.
A

FL 250

29
Q
  1. What is the primary function of the Main Engine Control?
A

Hydro-mechanical control of fuel

30
Q
  1. What is the automatic function of the EEC during a climb?
A

Maintain initial N1 climb thrust throughout climb

31
Q
  1. When is Engine speed commanded to LOW IDLE?
A

On the ground, four seconds after touchdown

32
Q
  1. How is the main fuel shutoff valve at the engine pylon operated?
A

Electrical control by the engine start lever and fire switch

33
Q
  1. A dim FUEL VALVE CLOSED light indicates?
A

Main fuel shutoff valve at the engine pylon is closed

34
Q
  1. What does an illuminated fuel FILTER BYPASS light indicate?
A

Impending bypass of the engine fuel filter

35
Q
  1. How is the HMU fuel shutoff valve operated? (This valve is at the engine fuel control)
A

Electrically by the engine fire warning switch and start lever

36
Q
  1. What does the engine oil pressure indicator show?
A

Unregulated pressure as a function of N2 speed

37
Q
  1. What is indicated when the OIL FILTER BYPASS light illuminates?
A

The scavenge oil filter is contaminated

38
Q
  1. The engine oil temperature indicator shows oil temperature coming out of the engine after the oil cooler
A

TRUE

39
Q
  1. During engine start, the start switch disengages at N2.
A

56%

40
Q
  1. The _______shows the current mode of the N1 limit computed by the FMC.
A

Thrust Mode Annunciator

41
Q
  1. The engine accessory components are driven by
A

The N2 spool

42
Q
  1. With the engine at normal operating temperature and idle, the oil PRESSURE must be ___________.
A

Above the red radial

43
Q
  1. Engine fan air cools _______.
A

The IDG/Generator

44
Q
  1. With the engine at climb N1 limit power, the stage pneumatic bleed provides bleed air for the pneumatic system.
A

5th

45
Q
  1. The power to move the engine thrust reversers is ______.
A

Hydraulic

46
Q
  1. Engine oil is cooled by ___________.
A

Engine fuel flow

47
Q
  1. Reverse thrust operation is permitted for
A

Ground use only

48
Q
  1. What is maximum engine N1 limit?
A

104.0%

49
Q
  1. What is maximum engine N2?
A

1 05.0%

50
Q
  1. What is maximum takeoff EGT?
A

950 C

51
Q
  1. What is maximum continuous engine EGT?
A

925C

52
Q
  1. What is maximum starting EGT for the aircraft engines?
A

725C

53
Q
  1. What is minimum oil pressure for continued engine operation?
A

13 psi

54
Q
  1. An engine must be shut down if the oil temperature exceeds __________.
A

155C

55
Q
  1. Which is the correct EEC switch configuration for takeoff?
A

Both must be ON or both ALT

56
Q
  1. Condition: BAT Volts: 23V; BATT SW: ON; APU SW placed to START; no DC ammeter deflection is observed during a one minute period. What should the pilot do?
A

Place the APU switch to OFF, then try again

57
Q
  1. What causes an automatic shutdown of the APU inflight?
A

LOW OIL PRESS light on

58
Q
  1. The New Generation aircraft APU generator will power both transfer buses inflight.
A

a. True