APU TEST QUESTIONS AND ANSWERS
If APU press low/temp high light does not come on between___________, immediately
place APU Master Switch in ________ position to avoid possible damage to APU. -
Answers - 0 and 50 percent N2, OFF
The starter duty cycle for the APU is? - Answers - 1 minute on, 5 minutes off
Maximum allowable APU Oil Consumption rate in normal or standby modes is? -
Answers - 0.5 quarts per hour
If the APU fire detection system bite switch is inadvertently actuated the APU will? -
Answers - Auto shutdown
At what speed does the APU starter cut-out? - Answers - 50% N2
To discharge an APU fire suppression bottle the: - Answers - Aircraft battery must be
installed and connected
Upon completion of the APU start cycle, (in both standby and normal modes), if the APU
GEN OFF light remains illuminated, you should? - Answers - Place APU GEN switch
momentarily to reset
The APU external panel is located? - Answers - Aft of left wheel well
Terminate APU start if rom indicator stops rising for any period of - Answers - 4-5
seconds
When does the APU door open light go off? - Answers - Approximately 60 seconds after
APU master switch is placed in the off position
What is the maximum EGT during start for the APU? - Answers - 585 degrees C
If personnel are not occupying the aircraft or flight compartment while APU is operating,
what must be done? - Answers - External fire control panel must be opened
The minimum fuel required for APU operation is ? - Answers - 1000 lbs. in tank 2
Why must the battery switch be placed in the BAT position prior to APU operation? -
Answers - Arms the fire detection system
The APU PWR AVAIL light will illuminate at approximately? - Answers - 95% N2
After two consecutive APU starts the APU must be off five minutes, after the next two
consecutive starts the APU must be off for ? - Answers - 1 hour
If APU press low/temp high light does not come on between___________, immediately
place APU Master Switch in ________ position to avoid possible damage to APU. -
Answers - 0 and 50 percent N2, OFF
The starter duty cycle for the APU is? - Answers - 1 minute on, 5 minutes off
Maximum allowable APU Oil Consumption rate in normal or standby modes is? -
Answers - 0.5 quarts per hour
If the APU fire detection system bite switch is inadvertently actuated the APU will? -
Answers - Auto shutdown
At what speed does the APU starter cut-out? - Answers - 50% N2
To discharge an APU fire suppression bottle the: - Answers - Aircraft battery must be
installed and connected
Upon completion of the APU start cycle, (in both standby and normal modes), if the APU
GEN OFF light remains illuminated, you should? - Answers - Place APU GEN switch
momentarily to reset
The APU external panel is located? - Answers - Aft of left wheel well
Terminate APU start if rom indicator stops rising for any period of - Answers - 4-5
seconds
When does the APU door open light go off? - Answers - Approximately 60 seconds after
APU master switch is placed in the off position
What is the maximum EGT during start for the APU? - Answers - 585 degrees C
If personnel are not occupying the aircraft or flight compartment while APU is operating,
what must be done? - Answers - External fire control panel must be opened
The minimum fuel required for APU operation is ? - Answers - 1000 lbs. in tank 2
Why must the battery switch be placed in the BAT position prior to APU operation? -
Answers - Arms the fire detection system
The APU PWR AVAIL light will illuminate at approximately? - Answers - 95% N2
After two consecutive APU starts the APU must be off five minutes, after the next two
consecutive starts the APU must be off for ? - Answers - 1 hour
