Airbus A320 - APU

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

True.

False.

Correct! Wrong!

Maximum altitude for APU bleed operation is:

15, 000 ft.

22, 000 ft.

20, 000 ft.

18, 000 ft.

Correct! Wrong!

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

True.

False.

Correct! Wrong!

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

No.

Yes.

Correct! Wrong!

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!

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.

All statements are correct.

Correct! Wrong!

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

Stops immediately.

Keeps running for 60 seconds.

Keeps running for 2 minutes.

Keeps running for 4 minutes.

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.

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

Yes.

No.

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?

It is not possible to determine without checking the ECAM.

The aircraft batteries.

The APU.

External power.

Correct! Wrong!

The APU is supplied from the:

Right fuel feed line.

Left or right fuel line.

Left fuel feed line.

Correct! Wrong!

The APU MASTER SW FAULT light will illuminate:

For an APU overheat or APU fire.

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.

Correct! Wrong!

The APU may obtain power for starting from:

Ground services.

Normal aircraft supply.

All statements are correct.

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

Correct! Wrong!

How many APU fire extinguisher bottles are installed?

Two.

One AC operated and one DC operated.

One.

Correct! Wrong!

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

False.

True.

Correct! Wrong!

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

Yes, except during approach and go-around.

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

No.

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

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 only in flight.

Runs all time.

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 APU cannot be shut down from outside the aircraft.

False.

True.

Correct! Wrong!

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

APU FIRE pushbutton illuminated.

All statements are correct.

SQUIB and DISCH lights illuminated.

Correct! Wrong!

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

Red.

Green.

Amber.

White.

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

False.

True.

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).

Third stage turbine.

Mechanical shaft.

Second stage compressor.

Second stage turbine.

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.

20 hours.

25 hours

10 hours.

5 hours.

Correct! Wrong!

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

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.

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

Correct! Wrong!

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

20, 000 ft.

39, 000 ft.

15, 000 ft.

25, 000 ft.

Correct! Wrong!

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

False.

True.

Correct! Wrong!

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

False.

True.

Correct! Wrong!

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

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

Open the air intake flap and supply fuel pressure.

Connect the APU generator to the aircraft electrical system.

Correct! Wrong!

What is the maximum operating altitude of the APU?

39,000 feet.

30,000 feet.

35,000 feet.

25,000 feet.

Correct! Wrong!

The APU system page will appear on the ECAM:

All statements are correct.

When selected by the flight crew.

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

Correct! Wrong!

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.

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!

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:

Speed and temperature monitoring.

Monitoring of bleed air and shut down.

Sequence and monitoring of start.

All statements are correct.

Correct! Wrong!

Airbus A320 – APU

Quiz

Airbus A320 - APU

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

Maximum altitude for APU bleed operation is:

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

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

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

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

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

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

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

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 is supplied from the:

The APU MASTER SW FAULT light will illuminate:

The APU may obtain power for starting from:

How many APU fire extinguisher bottles are installed?

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

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

When the APU is running, the APU fuel pump:

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

The APU cannot be shut down from outside the aircraft.

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

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

To start the APU the:

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

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).

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.

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

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

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

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

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

What is the maximum operating altitude of the APU?

The APU system page will appear on the ECAM:

When the APU MASTER SW is selected ON:

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

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: