Vayudoot Aviation

1. 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.

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

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

Automatic APU shut down triggered by the ECB.

All of the above.

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

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

False

True

4. The APU MASTER SW FAULT light will illuminate:

When an automatic shutdown of the APU occurs.

When APU low oil pressure is detected.

For an APU overheat or APU fire.

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

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

True

False

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

APU FIRE pb illuminated

SQUIB + DISCH lights illuminated

APU FIRE pb illuminated and SQUIB + DISCH lights illuminated

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

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

Connect the APU generator to the aircraft electrical system.

Open the air intake flap and supply fuel pressure.

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

Green

Amber

White

Red

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

Yes

No

10. To start the APU the

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

Both are correct.

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

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

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

No.

Yes, except during approach and go-around.

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

12. The APU is supplied from the:

Right fuel feed line.

Left or right fuel line

Left fuel feed line.

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

True

False

14. 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), EGT overtemperature, Underspeed, Overspeed, low oil pressure, high oil pressure

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

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

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

False

True

16. 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)

3rd stage turbine

2nd stage turbine.

2nd stage compressor

Mechanical shaft

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

23,000 feet

26,000 feet

28,000 feet

29,000 feet

18. When the APU MASTER SW is selected ON:

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

The APU computer automatically starts the APU.

The APU door opens.

Connects the APU generator to the aircraft electrical system.

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

20, 000 ft

15, 000 ft

25, 000 ft

39, 000 ft

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

39,000 feet

35,000 feet

30,000 feet

25,000 feet

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

False

True

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

False

True

23. 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.

All of the above.

Speed and temperature monitoring.

24. 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?

It is not possible to determine without checking the ECAM.

External power

The APU.

The aircraft batteries

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

No

Yes

26. 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.

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

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

28. 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

HIGH in all cases.

A319/320 – HIGH and A321 – NORMAL

A319/320 – NORMAL and A321 – HIGH

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

True

False

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

Yes

No

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

Yes

No

32. Maximum altitude for APU bleed operation is:

1, 000 ft

15, 000 ft

22, 000 ft

20, 000 ft

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

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

The APU can be started up to 35,000 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 25,000 feet using only the aircraft batteries.

34. How many APU fire extinguisher bottles are installed?

One

One AC operated and one DC operated

Two

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

No

Yes

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

Keeps running for 60 seconds

Stops immediately

Keeps running for 4 minutes

Keeps running for 2 minutes

37. 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.

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

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

It is normally left in the lights out position.

Both are correct.

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

SQUIB and DISCH lights illuminated

APU FIRE pushbutton illuminated.

Both are correct.

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

Runs only in flight.

Runs when tank pumps pressure is not sufficient.

Runs when the APU fuel pump is selected on.

Runs all time

Question Bank

Questions for Auxiliary Power Unit A320