Airbus A320 – APU - SmartCockpit - Airline training guides, Aviation, Operations, Safety

What is the maximum operating altitude of the APU?

35,000 feet.

39,000 feet.

25,000 feet.

30,000 feet.

Correct! Wrong!

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

Red.

Amber.

White.

Green.

Correct! Wrong!

After 3 starter motor duty cycles, you shall wait 30 minutes before attempting 3 more cycles.

True.

False.

Correct! Wrong!

After 3 starter motor duty cycles, you shall wait 60 min before attempting 3 more cycles.

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.

Correct! Wrong!

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

Keeps running for 4 minutes.

Stops immediately.

Keeps running for 60 seconds.

Keeps running for 2 minutes.

Correct! Wrong!

The APU is supplied from the:

Left fuel feed line.

Right fuel feed line.

Left or right fuel line.

Correct! Wrong!

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

True.

False.

Correct! Wrong!

To start the APU the:

All statements are correct.

BAT 1 and 2 pbs must be selected to ON.

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

Correct! Wrong!

The APU MASTER SW FAULT light will illuminate:

When APU low oil pressure is detected.

When an automatic shutdown of the APU occurs.

For an APU overheat or APU fire.

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

Correct! Wrong!

When the APU MASTER SW is selected ON:

The APU door opens.

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

The APU computer automatically starts the APU.

Connects the APU generator to the aircraft electrical system.

Correct! Wrong!

The APU cannot be shut down from outside the aircraft.

False.

True.

Correct! Wrong!

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

True.

False.

Correct! Wrong!

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).

Second stage compressor.

Second stage turbine.

Mechanical shaft.

Third stage turbine.

Correct! Wrong!

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

True.

False.

Correct! Wrong!

The APU may obtain power for starting from:

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

All statements are correct.

Ground services.

Normal aircraft supply.

Correct! Wrong!

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 statements are correct.

Speed and temperature monitoring.

Monitoring of bleed air and shut down.

Sequence and monitoring of start.

Correct! Wrong!

When the APU is running, the APU fuel pump:

Runs when tank pumps pressure is not sufficient.

Runs when the APU fuel pump is selected on.

Runs all time.

Runs only in flight.

Correct! Wrong!

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 aircraft batteries.

External power.

It is not possible to determine without checking the ECAM.

The APU.

Correct! Wrong!

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

25, 000 ft.

20, 000 ft.

15, 000 ft.

39, 000 ft.

Correct! Wrong!

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

No.

Yes.

Correct! Wrong!

Automatic shutdown of APU on ground will not occur while crew is performing this test.

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

False.

True.

Correct! Wrong!

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

False.

True.

Correct! Wrong!

The APU system page will appear on the ECAM:

When selected by the flight crew.

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

All statements are correct.

Correct! Wrong!

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

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

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

Yes, except during approach and go-around.

No.

Correct! Wrong!

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

Yes.

No.

Correct! Wrong!

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

Connect the APU generator to the aircraft electrical system.

Open the air intake flap and supply fuel pressure.

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

Correct! Wrong!

How many APU fire extinguisher bottles are installed?

Two.

One AC operated and one DC operated.

One.

Correct! Wrong!

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.

All statements are correct.

It is normally left in the lights out position.

Correct! Wrong!

Nobody is in the cockpit, and there is an APU FIRE, which statement is correct?

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.

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.

Correct! Wrong!

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

Yes.

No.

Correct! Wrong!

The APU may be started and operated even if the LOW OIL LEVEL ECAM advisory is displayed. Maintenance action is required within next _____ of APU operation.

25 hours

10 hours.

5 hours.

20 hours.

Correct! Wrong!

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

True.

False.

Correct! Wrong!

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

SQUIB and DISCH lights illuminated.

All statements are correct.

APU FIRE pushbutton illuminated.

Correct! Wrong!

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.

Correct! Wrong!

Maximum altitude for APU bleed operation is:

18, 000 ft.

15, 000 ft.

20, 000 ft.

22, 000 ft.

Correct! Wrong!

Airbus A320 – APU