APU

Question 1

The APU can be started and operated to…
- 41,000 feet.
- the airplane maximum certified altitude.
- 10,000 feet.
- 22,000 feet.

Answer 1

the airplane maximum certified altitude.

Question 2

The APU indications may be viewed on…
- right Auxiliary (AUX) display panel.
- left CDU.
- any MFD’’s status page.
- captain’s VSD.

Answer 2

any MFD’’s status page.

Question 3

The APU has two operating modes, they are…
- operating and non-operating.
- attended and unattended.
- ground and flight.
- assisted and inflight.

Answer 3

attended and unattended.

Question 4

The APU is normally supplied fuel from the…
- right main fuel tank.
- left fuel manifold.
- center fuel tank.
- a dedicated APU fuel tank.

Answer 4

left fuel manifold.

Question 5

When the APU is running (95% of target speed + 2 seconds), what indications informs the flight crew?
- APU RUNNING memo message on EICAS
- APU AVAIL displayed on the Auxiliary (AUX) display
- APU RUNNING displayed on center CDU screen
- There are no indications.

Answer 5

APU RUNNING memo message on EICAS

Question 6

Regardless of APU selector position, the APU automatically starts if…
- ground power is removed.
- an engine fails.
- three or more generators go offline in flight.
- three or more generators go offline on the ground.

Answer 6

three or more generators go offline in flight.

Question 7

When the APU selector is rotated to OFF, the APUC initiates a normal shutdown sequence. The APU cooldown cycle is…
- 2 minutes.
- 3 minutes.
- 5 minutes.
- 1 minute.

Answer 7

2 minutes.

Question 8

If starting the APU from an unpowered airplane (battery switch recently moved to ON), what does the APU controller (APUC) wait for before proceeding with the APU start?
- The availability of the CCS applications.
- Fuel pressure from the right fuel manifold.
- Battery voltage of the main battery.
- APU inlet door position.

Answer 8

The availability of the CCS applications.