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Airbus A320 APU System quiz. All questions relatedto APU.1.To start the APU the

Both are correct.BAT 1 and 2 push buttons do not need to be selected

ON if external power is available.

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

2.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:

All of the above.

Monitoring of bleed air and shut down.

Speed and temperature monitoring.

Sequence and monitoring of start.

3.When the APU Master Switch is released, a normal

APU shutdown occurs:

Without a delay, in all cases.

With a delay if the bleed air was in use.

Without delay in all cases.

4.When selected on, the APU START push button, will:Open the air intake flap and supply fuel pressure.

Start the APU if the APU MASTER SW was

previously selected ON.

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Connect the APU generator to the aircraft electrical

system.

5.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 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.

6.If APU bleed was used, after a manual shut down

sequence, the APU:

Keeps running for 60 seconds

Keeps running for 2 minutesKeeps running for 4 minutes

Stops immediately

7.When the APU MASTER SW is selected ON:

The APU door opens.

Connects the APU generator to the aircraft electrical

system.The APU computer automatically starts the APU.

the APU computer automatically completes a self-test,

opens the air intake flap and supplies fuel pr

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8.The APU MASTER SW FAULT light will illuminate:

If the batteries are selected OFF while the APU is

operating.

For an APU overheat or APU fire.When an automatic shutdown of the APU occurs.

When APU low oil pressure is detected.

9.What is the maximum altitude at which the APU may

be started using the batteries only?

39, 000 ft

20, 000 ft

25, 000 ft

15, 000 ft

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

Runs when the APU fuel pump is selected on.

Runs all timeRuns only in flight.

Runs when tank pumps pressure is not sufficient.

11.The APU BLEED valve is automatically closed above

______ feet descending by the ECB.

29,000 feet

28,000 feet25,000 feet

23,000 feet

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12.The APU may obtain power for starting from:

All of the above.

The aircraft's batteries or in combination with the

external power.Normal aircraft supply.

Ground services.

13.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 pressu

Fire (on ground only), EGT overtemperature, Reverse

flow, Overspeed, low oil pressure, high oil pres

Fire (on ground only), underspeed, overspeed, EGT

overtemperature, Reverse flow, Low oil pressure, D

14.The APU is supplied from the:

Left fuel feed line.

Right fuel feed line.

Left or Right fuel feed line.

15.Can the APU be used with wing anti-ice on?No.

Yes, but only for electrical power.

Yes, except during approach and go-around.

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

ft.

16.How many APU fire extinguisher bottles areinstalled?

One

Two

One AC operated and one DC operated

17.With battery power only, what would an APU fire test

look like?

APU FIRE pb illuminated and SQUIB + DISCH lights

illuminated

APU FIRE pb illuminated

SQUIB + DISCH lights illuminated