Airbus A330 - APU

On APU External Power panel (under the nose fuselage), the ground staff can:

Stop the APU by pressing the APU SHUT OFF pb in case of emergency.

Connect the APU.

Stop the APU.

Correct! Wrong!

The AVAIL Indication is in green, when APU rpm (N) is _____.

Available.

Above 95 %.

Ready to be connected.

Correct! Wrong!

The ECB (Electronic Control Box) controls the APU BLEED valves. If APU BLEED is set to ON, the bleed valve closes at _ when climbing, and reopens at _ when descending.

22,000 ft and 20,000 ft.

20,000 ft and 18,000 ft.

25,000 ft and 23,000 ft.

Correct! Wrong!

Before the APU starter is energized:

Both APU fuel pumps must be selected On.

The APU intake flap must be fully open.

The APU bleed valve pb must be deselected.

Correct! Wrong!

Which one of the following statements is true?

The APU is supplied by aircraft fuel system via two APU fuel pumps.

The APU is supplied by its own fuel reservoir.

The APU is supplied by the engines fuel pumps.

Correct! Wrong!

The APU may obtain power for starting from the batteries specifically assigned to the APU, or in combination with the external power, or normal aircraft supply.

True.

False.

Correct! Wrong!

The APU is supplied from the trim tank transfer line. The ECB (Electronic Control Box) controls the fuel flow.

True.

False.

Correct! Wrong!

The ECB (Electronic Control Box) controls the electric starter. The starter engages if the air intake is fully open and provided the MASTER SW pushbutton is ON.

False.

True.

Correct! Wrong!

The ECB (Electronic Control Box) controls the electric starter. The starter engages if the air intake is fully open and provided the MASTER SW and the START pushbuttons are ON.

On ground with no GPU, APU start procedure requires:

The Engine bleed air to be On.

All three aircraft batteries to be On.

Only the APU battery to be On.

Correct! Wrong!

APU master switch - The Amber FAULT light comes on, and a Caution is displayed on the ECAM. What does it mean?

An APU fault has occurred without auto shutdown.

The APU is running with the Ground Power Unit (GPU) connected.

An APU shutdown has occurred.

Correct! Wrong!

APU MASTER SW pb-sw - This pushbutton controls the electric supply for APU operation, and its protective features. It also controls the start and shutdown sequences. This amber FAULT light comes on, and a caution appears on the ECAM, when an automatic APU shutdown occurs. In case of automatic, non emergency shutdown, the air inlet flap closes _____ after the APU speed is lower than 7 %.

5 minutes.

15 minutes.

2 minutes.

Correct! Wrong!

If an automatic, non-emergency shutdown happens on ground, the 15 min countdown starts after liftoff.

In flight, in case of APU fire:

The APU shutdown and the fire extinguisher discharge is fully automatic.

The flight crew has to stop APU by pressing the APU master switch and to use the APU FIRE handle.

The flight crew has to use the APU FIRE pb.

Correct! Wrong!

APU start is permitted throughout the normal flight envelope, except when APU battery only is supplying.

True.

False.

Correct! Wrong!

During takeoff and go-around, the APU can supply pneumatics:

To reduce pressurization changes for greater passager comfort.

To increase bleed pressure at high engine RPM.

To increase aircraft performance during critical phases of flight.

Correct! Wrong!

In case of APU fire on ground:

The ground crew has to press the APU SHUT OFF pb On.

The APU will shutdown and the fire extinguisher discharge is fully automatic.

The APU will shutdown, but cockpit crew supervision is necessary.

Correct! Wrong!

Airbus A330 – APU

Quiz

Airbus A330 - APU

On APU External Power panel (under the nose fuselage), the ground staff can:

The AVAIL Indication is in green, when APU rpm (N) is _____.

The ECB (Electronic Control Box) controls the APU BLEED valves. If APU BLEED is set to ON, the bleed valve closes at _____ when climbing, and reopens at _____ when descending.

Before the APU starter is energized:

Which one of the following statements is true?

The APU may obtain power for starting from the batteries specifically assigned to the APU, or in combination with the external power, or normal aircraft supply.

The APU is supplied from the trim tank transfer line. The ECB (Electronic Control Box) controls the fuel flow.

The ECB (Electronic Control Box) controls the electric starter. The starter engages if the air intake is fully open and provided the MASTER SW pushbutton is ON.

On ground with no GPU, APU start procedure requires:

APU master switch - The Amber FAULT light comes on, and a Caution is displayed on the ECAM. What does it mean?

In flight, in case of APU fire:

APU start is permitted throughout the normal flight envelope, except when APU battery only is supplying.

During takeoff and go-around, the APU can supply pneumatics:

In case of APU fire on ground:

The ECB (Electronic Control Box) controls the APU BLEED valves. If APU BLEED is set to ON, the bleed valve closes at _ when climbing, and reopens at _ when descending.