C-17 APU TEST QUESTIONS AND ANSWERS
Allow APU to operate with no load for a minimum of __________ prior to shutdown. -
Answers - Two minutes
The APU PWR Switch on the electrical panel shall remain on until after the APU is
completely shutdown. - Answers - TRUE
To prevent injury to personnel or damage to equipment, do not operate the APU under
the following conditions: - Answers - With fire detection system loop A and loop B
inoperative
What are the indications of a successful APU loop A and loop B test on the
environmental panel? - Answers - 1. APU loop A and loop B lights come on, central
aural warning system (CAWS) sounds- Master warning press to reset lights on
glareshield comes on- Fire light on APU panel comes on, WAP displays APU- All of the
above
What area must the operator always ensure is clear prior to an APU start? - Answers -
1. APU Inlet and Exhaust
After setting the APU Start Control switch to start position what EGT indication are you
looking for? - Answers - EGT increases and stabilizes
Activation of the APU Off/ARM switchlight on the APU panel will provide an automatic
shutdown of the APU - Answers - True
An APU fire is indicated by which of the following: - Answers - 1. Master warning lights
on instrument panel, APU displayed on CUE, LOOP A and LOOP B lights on
environmental panel, CAWS and APU warning horns and fire light on APU panel
An automatic shutdown occurs when APU EGT exceeds _________ above 95%. -
Answers - 621 degress celsius
In the event of an APU fire, how many possible locations are available to shutdown the
APU? - Answers - 3
Personnel will position Start Control Switch to the run position for ________ second(s)
prior to starting the APU? - Answers - Two
Press and hold which switchlight to test all lights and digital indicators on the overhead
panel? - Answers - ANN/DIGT test switchlight
Set start control switch on APU panel to start and release and identify which parameters
are increasing? - Answers - ) Exhaust Gas Temperature and Revolutions Per Minute
Allow APU to operate with no load for a minimum of __________ prior to shutdown. -
Answers - Two minutes
The APU PWR Switch on the electrical panel shall remain on until after the APU is
completely shutdown. - Answers - TRUE
To prevent injury to personnel or damage to equipment, do not operate the APU under
the following conditions: - Answers - With fire detection system loop A and loop B
inoperative
What are the indications of a successful APU loop A and loop B test on the
environmental panel? - Answers - 1. APU loop A and loop B lights come on, central
aural warning system (CAWS) sounds- Master warning press to reset lights on
glareshield comes on- Fire light on APU panel comes on, WAP displays APU- All of the
above
What area must the operator always ensure is clear prior to an APU start? - Answers -
1. APU Inlet and Exhaust
After setting the APU Start Control switch to start position what EGT indication are you
looking for? - Answers - EGT increases and stabilizes
Activation of the APU Off/ARM switchlight on the APU panel will provide an automatic
shutdown of the APU - Answers - True
An APU fire is indicated by which of the following: - Answers - 1. Master warning lights
on instrument panel, APU displayed on CUE, LOOP A and LOOP B lights on
environmental panel, CAWS and APU warning horns and fire light on APU panel
An automatic shutdown occurs when APU EGT exceeds _________ above 95%. -
Answers - 621 degress celsius
In the event of an APU fire, how many possible locations are available to shutdown the
APU? - Answers - 3
Personnel will position Start Control Switch to the run position for ________ second(s)
prior to starting the APU? - Answers - Two
Press and hold which switchlight to test all lights and digital indicators on the overhead
panel? - Answers - ANN/DIGT test switchlight
Set start control switch on APU panel to start and release and identify which parameters
are increasing? - Answers - ) Exhaust Gas Temperature and Revolutions Per Minute
