Quiz Flashcards
To start the APU the:
BAT 1 and 2 push buttons must be selected to ON.
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.
When the APU Master Switch is released, a normal APU shutdown occurs:
With a delay if the bleed air was in use.
When selected on, the APU START push button, will:
Start the APU if the APU MASTER SW was previously selected ON.
The APU has an integral independent lubrication system for lubrication and cooling.
True.
The ECB (Electronic Control Box) controls the fuel flow.
True
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 MASTER SW FAULT light will illuminate:
When an automatic shutdown of the APU occurs.
The APU may be started up to what altitude?
The APU can be started at any altitude using normal aircraft electrical power.
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.
If APU bleed was used, after a manual shut down sequence, the APU:
Keeps running for 60 seconds
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.
BAT 1 and 2 push buttons do not need to be selected ON if external power is available.
It is normally left in the lights out position.
When selected OFF, the APU generator is de-energized.
What is the maximum altitude at which the APU may be started using the batteries only?
23,000 feet
When the APU is running, the APU fuel pump:
Runs when tank pumps pressure is not sufficient.
The APU BLEED valve is automatically closed above ______ feet descending by the ECB.
28,000 feet
With nobody in the cockpit, if you have an APU FIRE, which statement is correct?
On the ground, an APU EMER shut down will occur and the APU fire bottle will be discharged automatically.
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).
Mechanical shaft
Fire on ground or in flight will cause the APU MASTER SW pushbutton FAULT light to come on.
False.
With battery power, what would an APU fire test look like?
SQUIB and DISCH lights illuminated
APU FIRE pushbutton illuminated.
The starter engages if the air intake is closed and the MASTER SW and the START pushbuttons are ON.
False.
A FLAP OPEN indication is displayed in amber when the APU air inlet flaps is fully open
False
The APU may obtain power for starting from:
Ground services.
Normal aircraft supply.
The aircraft’s batteries or in combination with the external power.
The APU cannot be shut down from outside the aircraft.
False.
