APU QUESTIONS AND ANSWERS
What is the minimum acceptable oil level for the refer turbines? - Answers - 3/4
During APU preoperational inspection, you are required to check the APU oil reservoir
for proper level. Do not start the APU if the oil level is at or below __. - Answers - 1/2
With the APU operating, the wing and tail lights should be __. - Answers - On
When must you de-humidify the aircrafy? - Answers - 30 minutes of flight in high
humidity environment.
During APU Preoperational Inspection, which of the following plug (s) and cover (s) shall
be removed prior to starting the APU? - Answers - Pilot, TAS and AOA Probe covers
Wheel well lights should be (on/off) during all night ground operations? - Answers - On.
The APU consumes approximately ____ PPH when operating a normal electrical load
and the air-conditioning system. - Answers - 300
With the APU in-flight arming switch in the ARM position while on the deck, what will
occur? - Answers - Nose Landing Gear Upload Bypassed, Energizes ground OP DC
Bus, Disables APU Load Control Valv, Bypass Scissor Switch
If an APU fire occurs on the ground, what should you do? - Answers - Evacuate the
aircraft immediately.
While checking refrigeration turbines for proper oil level, add oil if ______. - Answers -
Less than 3/4.
Although supplied from any tank through the crossfeed system, fuel for the APU is
normally supplied from the ______. - Answers - Number 2 tank.
An overspeed of 106% will cause an automatic shutdown of the APU. IAW with the
NATOPS, what other conditions will automatically shut down the APU? - Answers - -
Loss of APU oil pressure
- APU compartment fire
What should you do before securing the APU if ground AIR is on? - Answers - ...
APU RPM limitations for ground operation are _____. - Answers - 98-102%
All aircrew and maintenance personnel must be aware of the potential for air multiplier
assembly damage as a result of _____. - Answers - Blocking the Air Intake
What is the minimum acceptable oil level for the refer turbines? - Answers - 3/4
During APU preoperational inspection, you are required to check the APU oil reservoir
for proper level. Do not start the APU if the oil level is at or below __. - Answers - 1/2
With the APU operating, the wing and tail lights should be __. - Answers - On
When must you de-humidify the aircrafy? - Answers - 30 minutes of flight in high
humidity environment.
During APU Preoperational Inspection, which of the following plug (s) and cover (s) shall
be removed prior to starting the APU? - Answers - Pilot, TAS and AOA Probe covers
Wheel well lights should be (on/off) during all night ground operations? - Answers - On.
The APU consumes approximately ____ PPH when operating a normal electrical load
and the air-conditioning system. - Answers - 300
With the APU in-flight arming switch in the ARM position while on the deck, what will
occur? - Answers - Nose Landing Gear Upload Bypassed, Energizes ground OP DC
Bus, Disables APU Load Control Valv, Bypass Scissor Switch
If an APU fire occurs on the ground, what should you do? - Answers - Evacuate the
aircraft immediately.
While checking refrigeration turbines for proper oil level, add oil if ______. - Answers -
Less than 3/4.
Although supplied from any tank through the crossfeed system, fuel for the APU is
normally supplied from the ______. - Answers - Number 2 tank.
An overspeed of 106% will cause an automatic shutdown of the APU. IAW with the
NATOPS, what other conditions will automatically shut down the APU? - Answers - -
Loss of APU oil pressure
- APU compartment fire
What should you do before securing the APU if ground AIR is on? - Answers - ...
APU RPM limitations for ground operation are _____. - Answers - 98-102%
All aircrew and maintenance personnel must be aware of the potential for air multiplier
assembly damage as a result of _____. - Answers - Blocking the Air Intake
