Auxiliary Power Unit
II of XVIII
Q 01: To
start the APU the:
A:
BAT 1 and 2 push buttons must be selected to ON.
B: BAT
1 and 2 push buttons do not need to be selected ON if external power is
available.
C: Both are correct.
Q 02: 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:
A: Sequence and monitoring of start.
B: Speed and temperature monitoring.
C: Monitoring of bleed air and shut down.
D:
All of the above.
Q 03: When
the APU Master Switch is released, a normal APU shutdown occurs:
A: Without delay in all cases.
B: With a delay, in all cases.
C:
With a delay if the bleed air was in use.
Q 04: When
selected on, the APU START push button, will:
A: Connect the APU generator to the aircraft
electrical system.
B:
Start the APU if the APU MASTER SW was previously selected ON.
C: Open the air intake flap and supply fuel
pressure.
Q 05: The
APU has an integral independent lubrication system for lubrication and cooling.
A:
True.
B: False.
Q 06: The
ECB (Electronic Control Box) controls the fuel flow.
A:
True.
B: False.
Q 07: When
the APU MASTER SW is selected ON:
A:
The APU computer automatically completes a self-test, opens the air intake flap
and supplies fuel pressure.
B: The APU computer automatically starts the
APU.
C: Connects the APU generator to the
aircraft electrical system.
D: The APU door opens.
Q 08: The
APU MASTER SW FAULT light will illuminate:
A: When APU low oil pressure is detected.
B:
When an automatic shutdown of the APU occurs.
C: For an APU overheat or APU fire.
D: If the batteries are selected OFF while
the APU is operating.
Q 09: The
APU may be started up to what altitude?
A:
The APU can be started at any altitude using normal aircraft electrical power.
B: The APU can be started up to 35,000 feet
using only the aircraft batteries.
B: The APU can be started up to 30,000 feet
using only the aircraft batteries.
D: The APU can be started up to 25,000 feet
using only the aircraft batteries.
Q 10: The
APU system page will appear on the ECAM:
A: When selected by the crew.
B: Automatically whenever the APU is started
and AC power is available.
C:
Both are correct.
Q 11: If APU
bleed was used, after a manual shut down sequence, the APU:
A: Stops immediately
B: Keeps running for 4 minutes
C: Keeps running for 2 minutes
D:
Keeps running for 60 seconds
Q 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?
A: It is not possible to determine without
checking the ECAM.
B: The aircraft batteries
C:
The APU.
D: External power
Q 13: BAT 1
and 2 push buttons do not need to be selected ON if external power is available.
A: It is normally left in the lights out
position.
B: When selected OFF, the APU generator is
de-energized.
C:
Both are correct.
Q 14: What
is the maximum altitude at which the APU may be started using the batteries
only?
A: 15, 000 ft
B: 20, 000 ft
C:
25, 000 ft
D: 39, 000 ft
Q 16 :When
the APU is running, the APU fuel pump:
A:
Runs when tank pumps pressure is not sufficient.
B: Runs all time
C: Runs only in flight.
D: Runs when the APU fuel pump is selected
on.
Q 17: The
APU BLEED valve is automatically closed above ______ feet descending by the
ECB.
A:
23,000 feet
B: 26,000 feet.
C: 28,000 feet
D: 29,000 feet.
Q 18: With
nobody in the cockpit, if you have an APU FIRE, which statement is correct?
A: On
the ground, an APU EMER shut down will occur and the APU fire bottle will be
discharged automatically.
B: On the ground, you have to perform the
ECAM actions to shut down the APU and extinguish the fire from the cockpit.
C: On the ground an APU AUTO shut down will
occur but you have to discharge the APU fire bottle manually.
D: In the air, an APU EMER shut down will
occur and the APU fire bottle will be discharged automatically.
Q 19: 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)
A: 2nd stage compressor
B: 3rd stage turbine
C: 2nd stage turbine.
D:
Mechanical shaft
Q 20: Fire
on ground or in flight will cause the APU MASTER SW pushbutton FAULT light to
come on.
A: True.
B:
False.
Q 21: With
battery power, what would an APU fire test look like?
A: APU FIRE pushbutton illuminated.
B: SQUIB and DISCH lights illuminated
C:
Both are correct.
Q 22: The
starter engages if the air intake is closed and the MASTER SW and the START
pushbuttons are ON.
A: True.
B:
False.
Q 23: A FLAP
OPEN indication is displayed in amber when the APU air inlet flaps is fully
open
A: True
B:
False
(Note: It is displayed in green.)
Q 24: The
APU may obtain power for starting from:
A: Ground services.
B: Normal aircraft supply.
C: The aircraft’s batteries or in
combination with the external power.
D:
All of the above.
Q 25: The
APU cannot be shut down from outside the aircraft.
A: True.
B:
False.
(Note:
APU SHUT OFF pushbutton on External Power Panel can be used to shut down
APU)
Q 26: What
are some of the causes for an APU automatic shutdown?
A: Fire (on ground only), EGT
overtemperature, No acceleration, low oil pressure.
B: Fire (on ground only), EGT overtemperature,
Underspeed, Overspeed, low oil pressure, high oil pressure
C: Fire (on ground only), EGT
overtemperature, Reverse flow, Overspeed, low oil pressure, high oil pressure
D:
Fire (on ground only), underspeed, overspeed, EGT overtemperature, Reverse flow,
Low oil pressure, DC power loss.
(Note – APU automatic shutdown occurs when
Fire (on ground only), - Underspeed and overspeed, - EGT overtemperature, -
Reverse flow, - Low oil pressure, - DC power loss,- No acceleration,-High oil
temperature,- ECB failure,- Slow start,- Loss of overspeed protection.)
Q 27:
Maximum altitude for APU bleed operation is:
A: 15, 000 ft
B: 18, 000 ft
C:
20, 000 ft
D: 22, 000 ft
Q 28: Can
the APU FIRE test be performed with the APU running?
A:
Yes
B: No
(Note - The automatic shutdown of the APU on
the ground will not occur while the flight crew is performing this test.)
Q 29: The
APU is supplied from the:
A:
Left fuel feed line.
B: Right fuel feed line.
C: Left or right fuel line
Q 30: On
ground, the No Break Power Transfer function is inhibited in case of APU
shutdown generated by which of the following conditions?
A: Automatic APU shut down triggered by the
ECB.
B: APU shut down from the REFUEL/DEFUEL
panel or from the APU FIRE pushbutton.
C: APU shut down from emergency control
provided on the external power panel.
D:
All of the above.
Q 31: Can
the APU be used with wing anti-ice on?
A: No.
B:
Yes, but only for electrical power. The APU bleed valve should not be opened
while using wing anti-ice.
C: Yes, except during approach and
go-around.
D: Yes, but the altitude of utilization is
limited to 15, 000 ft.
Q 32: On
ground, can you start the APU using the aircraft batteries only?
A:
Yes
B: No
Q 33: When
starting the APU, the FUEL LO PR indication appears amber when an APU fuel low
pressure is detected.
A:
True
B: False
Q 34: The
LOW OIL LEVEL advisory pulses in ____ if
the APU oil quantity approaches its minimum value.
A: Amber
B: White
C: Red
D:
Green
Q 35: If an
APU start is initiated on battery power only, is fire protection available?
A:
Yes
B: No
Q 36:
A319/320/321. With the APU supplying bleed air what will be the pack flow if
the PACK FLOW selector is LOW?
A:
A319/320 – HIGH and A321 – NORMAL
B: A319/320 – NORMAL and A321 – HIGH
C: NORMAL in all cases
D: HIGH in all cases.
Q 37: What
is the maximum operating altitude of the APU?
A: 25,000 feet
B: 30,000 feet
C: 35,000 feet
D:
39,000 feet
Q 38: How many APU fire extinguisher bottles
are installed?
A:
One
B: Two
C: One AC operated and one DC operated
Q 39: Will the
APU bleed valve close automatically during climb? Will it reopen during
descent?
A: Yes
B: No
Q 40: With
battery power only, what would an APU fire test look like?
A:
APU FIRE pb illuminated and SQUIB + DISCH lights illuminated
B: APU FIRE pb illuminated
C: SQUIB + DISCH lights illuminated
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