A320_APU

To start the APU the:

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

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

• Both are correct.

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.

• Speed and temperature monitoring.

• Monitoring of bleed air and shut down.

• All of the above.

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

• Without delay in all cases.

• With a delay, in all cases.

• With a delay if the bleed air was in use.

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

• Connect the APU generator to the aircraft electrical system.

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

• Open the air intake flap and supply fuel pressure.

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

• True.

• False.

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

• True.

• False.

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.

• Connects the APU generator to the aircraft electrical system.

• The APU door opens.

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.

The APU may be started up to what altitude?

• The APU can be started at any altitude using normal aircraft electrical power.

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

The APU system page will appear on the ECAM:

• When selected by the crew.

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

• Both are correct.