Quiz

Question 1

To start the APU the:

Answer 1

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

Question 2

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:

Answer 2

Sequence and monitoring of start.
Speed and temperature monitoring.
Monitoring of bleed air and shut down.

Question 3

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

Answer 3

With a delay if the bleed air was in use.

Question 4

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

Answer 4

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

Question 5

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

Answer 5

True.

Question 6

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

Answer 6

True

Question 7

When the APU MASTER SW is selected ON:

Answer 7

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

Question 8

The APU MASTER SW FAULT light will illuminate:

Answer 8

When an automatic shutdown of the APU occurs.

Question 9

The APU may be started up to what altitude?

Answer 9

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

Question 10

The APU system page will appear on the ECAM:

Answer 10

When selected by the crew.

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

Question 11

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

Answer 11

Keeps running for 60 seconds

Question 12

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?

Answer 12

The APU.

Question 13

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

Answer 13

It is normally left in the lights out position.

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

Question 14

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

Answer 14

23,000 feet

Question 15

When the APU is running, the APU fuel pump:

Answer 15

Runs when tank pumps pressure is not sufficient.

Question 16

The APU BLEED valve is automatically closed above ______ feet descending by the ECB.

Answer 16

28,000 feet

Question 17

With nobody in the cockpit, if you have an APU FIRE, which statement is correct?

Answer 17

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

Question 18

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).

Answer 18

Mechanical shaft

Question 19

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

Answer 19

False.

Question 20

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

Answer 20

SQUIB and DISCH lights illuminated

APU FIRE pushbutton illuminated.

Question 21

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

Answer 21

False.

Question 22

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

Answer 22

False

Question 23

The APU may obtain power for starting from:

Answer 23

Ground services.
Normal aircraft supply.
The aircraft’s batteries or in combination with the external power.

Question 24

The APU cannot be shut down from outside the aircraft.

Answer 24

False.

Question 25

What are some of the causes for an APU automatic shutdown?

Answer 25

Fire (on ground only), underspeed, overspeed, EGT overtemperature, Reverse flow, Low oil pressure, DC power loss.

Question 26

Maximum altitude for APU bleed operation is:

Answer 26

20, 000 ft

Question 27

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

Answer 27

Yes

Question 28

The APU is supplied from the:

Answer 28

Left fuel feed line.

Question 29

On ground, the No Break Power Transfer function is inhibited in case of APU shutdown generated by which of the following conditions?

Answer 29

Automatic APU shut down triggered by the ECB.
APU shut down from the REFUEL/DEFUEL panel or from the APU FIRE pushbutton.
APU shut down from emergency control provided on the external power panel.

Question 30

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

Answer 30

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

Question 31

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

Answer 31

Yes

Question 32

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

Answer 32

True

Question 33

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

Answer 33

Green

Question 34

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

Answer 34

Yes

Question 35

A319/320/321. With the APU supplying bleed air what will be the pack flow if the PACK FLOW selector is LOW?

Answer 35

A319/320 ? HIGH and A321 - NORMAL

Question 36

What is the maximum operating altitude of the APU?

Answer 36

39,000 feet

Question 37

How many APU fire extinguisher bottles are installed?

Answer 37

One

Question 38

Will the APU bleed valve close automatically during climb? Will it reopen during descent?

Answer 38

No

Question 39

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

Answer 39

APU FIRE pb illuminated and SQUIB + DISCH lights illuminated