APU Flashcards
True or False: The APU can be used during flight.
False
True or False: The APU can only be used on the ground.
True
On which side of the fuselage is the APU air intake located?
Right Rear Fuselage
Which of the following combinations causes the highest fuel burn while operating the APU?
Generator and Bleed Air selected on
When will the fuel shutoff valve automatically close on the APU? (5)
Power Switch is Off
Fire detected in Tailcone
Extinguishing switch is pushed
GEN Overheat
Airplane is in flight
The APU is started _____.
Electrically
Pressing the PWR switchlight on the APU control panel, in preparation for APU start, does which of the following?
Arms the APU start circuits and opens the APU fuel shutoff valve.
True or False: The APU cannot be used as a source of bleed air.
False
True or False: APU bleed air can operate in conjunction with engine bleed air.
False
True or False: APU bleed air cannot operate in conjunction with engine bleed air.
True
True or False: The APU can be used while the aircraft is airborne.
False
True or False: The APU can be used on the ground for electrical, pneumatic, and hydraulic power.
False
When ready to start the APU, what should be accomplished after pressing the PWR switchlight?
Push the start button
The green ON light illuminates on the GEN switchlight when the APU is running at full speed and can supply which of the following?
28 Volt DC Power
Where can the APU’s electrical load be monitored?
MFD
True or False: Once the APU is at normal operating speed, APU bleed air is automatically supplied with no pilot input.
False
What color is the light that illuminates when the Fuel Valve is open to the APU?
Green
True or False: 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 the GEN Switch when advisory light illuminates.
Fuel for APU operation is supplied form which fuel tank?
Left
What does the APU Gen WARN light indicate?
- GEN not selected, but APU is running
- GEN selected, but does not come online
- GEN is taken offline
What is the color of the light that illuminates when the APU fuel valve is closed?
White
