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

The APU may obtain power for starting from:

Ground services.

All statements are correct.

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

Normal aircraft supply.

Correct! Wrong!

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

True.

False.

Correct! Wrong!

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

Amber.

Green.

Red.

White.

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 turbine.

Second stage compressor.

Third stage turbine.

Mechanical shaft.

Correct! Wrong!

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

Without delay in all cases.

With a delay if the bleed air was in use.

With a delay, in all cases.

Correct! Wrong!

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

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

In the air, 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.

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

Correct! Wrong!

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

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!

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

No.

Yes.

Correct! Wrong!

The APU MASTER SW FAULT light will illuminate:

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

When APU low oil pressure is detected.

When an automatic shutdown of the APU occurs.

For an APU overheat or APU fire.

Correct! Wrong!

When the APU is running, the APU fuel pump:

Runs only in flight.

Runs all time.

Runs when tank pumps pressure is not sufficient.

Runs when the APU fuel pump is selected on.

Correct! Wrong!

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

All statements are correct.

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

It is normally left in the lights out position.

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:

Monitoring of bleed air and shut down.

Sequence and monitoring of start.

All statements are correct.

Speed and temperature monitoring.

Correct! Wrong!

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

True.

False.

Correct! Wrong!

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

No.

Yes.

Correct! Wrong!

How many APU fire extinguisher bottles are installed?

One.

One AC operated and one DC operated.

Two.

Correct! Wrong!

The APU is supplied from the:

Left fuel feed line.

Left or right fuel line.

Right fuel feed line.

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.

5 hours.

10 hours.

20 hours.

25 hours

Correct! Wrong!

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

Yes.

No.

Correct! Wrong!

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

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

20, 000 ft.

15, 000 ft.

39, 000 ft.

25, 000 ft.

Correct! Wrong!

The APU system page will appear on the ECAM:

When selected by the flight crew.

All statements are correct.

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

Correct! Wrong!

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

APU FIRE pushbutton illuminated.

SQUIB and DISCH lights illuminated.

All statements are correct.

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.

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

True.

False.

Correct! Wrong!

The APU cannot be shut down from outside the aircraft.

False.

True.

Correct! Wrong!

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.

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

Yes, except during approach and go-around.

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!

When the APU MASTER SW is selected ON:

The APU computer automatically starts the APU.

The APU door opens.

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

Connects the APU generator to the aircraft electrical system.

Correct! Wrong!

Maximum altitude for APU bleed operation is:

20, 000 ft.

18, 000 ft.

22, 000 ft.

15, 000 ft.

Correct! Wrong!

To start the APU the:

All statements are correct.

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

BAT 1 and 2 pbs must be selected to ON.

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!

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.

Correct! Wrong!

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

False.

True.

Correct! Wrong!

What is the maximum operating altitude of the APU?

25,000 feet.

35,000 feet.

30,000 feet.

39,000 feet.

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!

Airbus A320 – APU