APU Flashcards
T or F: the APU can be used during flight.
False.
T or F: the APU can only be used on the ground.
True.
On which side of the fuselage is the APU air intake located?
Right side.
Which of the following combinations causes the highest fuel burn while operating the APU?
Both GEN and BLEEDs selected.
When will the fuel shutoff valve automatically close on the APU?
PWR switchlight is pushed off, fire is detected in tailcone, EXTG switchlight is pushed, airplane is in flight.
The APU is started with ____.
Airplane batteries or external power.
Pressing the PWR switchlight on the APU control panel, in preparation for APU start, does which of the following?
Opens the APU shutoff valve and supplies fuel to the APU.
T or F: the APU cannot be used as a source of bleed air on the ground.
False.
T or F: APU bleed air can operated in conjunction with engine bleed air.
False.
T or F: APU bleed air cannot operate in conjunction with engine bleed air.
True.
T or F: the APU can be used while the aircraft is airborne.
False.
T or F: the APU can be used on the ground for electrical, pneumatic, and hydraulic power.
False. It only supplies DC power and bleed air.
When ready to start the APU, what should be accomplished after pressing the PWR switchlight?
Verify the green APU FUEL VALVE OPEN advisory light illuminates, then press the START switchlight.
The green ON light illuminates on the APU GEN switchlight when the APU is running at full speed and can supply which of the following?
28V DC.
Where can the APU’s electrical load be monitored?
MFD electrical page.
T or F: once the APU is at normal operating speed, APU bleed air is automatically supplied with no pilot input.
False, the pilot must push the BLEED AIR switchlight.
What color is the light that illuminates when the APU fuel valve is open?
Green.
T or F: if the APU generator overheats, the APU will automatically shut down.
True.
What will happen if an APU generator fault is detected?
Electrical power to the starter/generator is removed, ON light extinguishes from GEN switchlight, WARN advisory light illuminates.
Fuel for APU operation is supplied from which fuel tank?
Left.
What does the APU GEN WARN light indicate?
The APU is running, but the generator is offline or a fault has occurred in the APU generator.
What is the color of the light that illuminates when the APU fuel valve is closed?
White.
