Vayudoot Aviation

1. What are some of the causes for an APU automatic shutdown?

Fire (on ground only), EGT overtemperature, No acceleration, low oil pressure.

Fire (on ground only), underspeed, overspeed, EGT overtemperature, Reverse flow, Low oil pressure, DC power loss.

Fire (on ground only), EGT overtemperature, Reverse flow, Overspeed, low oil pressure, high oil pressure

Fire (on ground only), EGT overtemperature, Underspeed, Overspeed, low oil pressure, high oil pressure

2. When the APU Master Switch is released, a normal APU shutdown occurs:

With a delay, in all cases.

Without delay in all cases.

With a delay if the bleed air was in use.

3. If APU bleed was used, after a manual shut down sequence, the APU:

Keeps running for 4 minutes

Stops immediately

Keeps running for 2 minutes

Keeps running for 60 seconds

4. The ECB (Electronic Control Box) controls the fuel flow.

True

False

5. When selected on, the APU START push button, will:

Connect the APU generator to the aircraft electrical system.

Start the APU if the APU MASTER SW was previously selected ON.

Open the air intake flap and supply fuel pressure.

6. With battery power only, what would an APU fire test look like?

APU FIRE pb illuminated and SQUIB + DISCH lights illuminated

SQUIB + DISCH lights illuminated

APU FIRE pb illuminated

7. When the APU MASTER SW is selected ON:

Connects the APU generator to the aircraft electrical system.

The APU door opens.

The APU computer automatically starts the APU.

The APU computer automatically completes a self-test, opens the air intake flap and supplies fuel pressure.

8. How many APU fire extinguisher bottles are installed?

One AC operated and one DC operated

One

Two

9. Maximum altitude for APU bleed operation is:

22, 000 ft

20, 000 ft

15, 000 ft

1, 000 ft

10. The basic element of the APU is a single shaft gas turbine which delivers ______ power for driving the accessory gearbox (electrical generator) and produces bleed air (engine starting and pneumatic supply)

Mechanical shaft

2nd stage compressor

3rd stage turbine

2nd stage turbine.

11. On ground, can you start the APU using the aircraft batteries only?

No

Yes

12. Can the APU FIRE test be performed with the APU running?

Yes

No

13. The APU MASTER SW FAULT light will illuminate:

For an APU overheat or APU fire.

When APU low oil pressure is detected.

When an automatic shutdown of the APU occurs.

If the batteries are selected OFF while the APU is operating.

14. If an APU start is initiated on battery power only, is fire protection available?

No

Yes

15. The APU BLEED valve is automatically closed above ______ feet descending by the ECB.

23,000 feet

28,000 feet

26,000 feet

29,000 feet

16. What is the maximum altitude at which the APU may be started using the batteries only?

25, 000 ft

39, 000 ft

20, 000 ft

15, 000 ft

17. The APU cannot be shut down from outside the aircraft.

True

False

18. If an APU start is initiated on battery power only, is fire protection available?

No

Yes

19. Can the APU be used with wing anti-ice on?

No.

Yes, but the altitude of utilization is limited to 15, 000 ft.

Yes, except during approach and go-around.

Yes, but only for electrical power. The APU bleed valve should not be opened while using wing anti-ice.

20. The APU may obtain power for starting from:

Normal aircraft supply.

All of the above.

Ground services.

The aircraft’s batteries or in combination with the external power.

21. To start the APU the

Both are correct.

BAT 1 and 2 push buttons must be selected to ON.

BAT 1 and 2 push buttons do not need to be selected ON if external power is available.

22. The starter engages if the air intake is closed and the MASTER SW and the START pushbuttons are ON.

True

False

23. On ground, the No Break Power Transfer function is inhibited in case of APU shutdown generated by which of the following conditions?

All of the above.

APU shut down from emergency control provided on the external power panel.

Automatic APU shut down triggered by the ECB.

APU shut down from the REFUEL/DEFUEL panel or from the APU FIRE pushbutton.

24. Fire on ground or in flight will cause the APU MASTER SW pushbutton FAULT light to come on.

False

True

25. With battery power, what would an APU fire test look like?

APU FIRE pushbutton illuminated.

Both are correct.

SQUIB and DISCH lights illuminated

26. The APU system page will appear on the ECAM:

Automatically whenever the APU is started and AC power is available.

When selected by the crew.

Both are correct.

27. A319/320/321. With the APU supplying bleed air what will be the pack flow if the PACK FLOW selector is LOW?

NORMAL in all cases

A319/320 – NORMAL and A321 – HIGH

A319/320 – HIGH and A321 – NORMAL

HIGH in all cases.

28. When starting the APU, the FUEL LO PR indication appears amber when an APU fuel low pressure is detected.

False

True

29. With nobody in the cockpit, if you have an APU FIRE, which statement is correct?

In the air, an APU EMER shut down will occur and the APU fire bottle will be discharged automatically.

On the ground an APU AUTO shut down will occur but you have to discharge the APU fire bottle manually.

On the ground, you have to perform the ECAM actions to shut down the APU and extinguish the fire from the cockpit.

On the ground, an APU EMER shut down will occur and the APU fire bottle will be discharged automatically.

30. With the engines off, if the AVAIL light is illuminated on both the APU START push button and the EXT PWR push button, what is the source of electrical power for the aircraft busses?

The APU.

It is not possible to determine without checking the ECAM.

The aircraft batteries

External power

31. The APU is supplied from the:

Left or right fuel line

Left fuel feed line.

Right fuel feed line.

32. What is the maximum operating altitude of the APU?

35,000 feet

39,000 feet

30,000 feet

25,000 feet

33. The APU has an integral independent lubrication system for lubrication and cooling.

False

True

34. The LOW OIL LEVEL advisory pulses in ____ if the APU oil quantity approaches its minimum value.

Amber

Red

White

Green

35. Will the APU bleed valve close automatically during climb? Will it reopen during descent?

No

Yes

36. BAT 1 and 2 push buttons do not need to be selected ON if external power is available.

Both are correct.

It is normally left in the lights out position.

When selected OFF, the APU generator is de-energized.

37. The APU may be started up to what altitude?

The APU can be started up to 25,000 feet using only the aircraft batteries.

The APU can be started at any altitude using normal aircraft electrical power.

The APU can be started up to 35,000 feet using only the aircraft batteries.

The APU can be started up to 30,000 feet using only the aircraft batteries.

38. The Electronic Control Box (ECB) is primarily a full authority digital electronic controller that performs the APU system logic for all modes of APU operation such as:

Sequence and monitoring of start.

Monitoring of bleed air and shut down.

Speed and temperature monitoring.

All of the above.

39. When the APU is running, the APU fuel pump:

Runs all time

Runs when the APU fuel pump is selected on.

Runs when tank pumps pressure is not sufficient.

Runs only in flight.

40. A FLAP OPEN indication is displayed in amber when the APU air inlet flaps is fully open

True

False

Question Bank

Questions for Auxiliary Power Unit A320