AMS 272 UNIT 3 EXAM QUESTIONS AND
ANSWERS GRADED A+ 2026
What does the load compressor provide? - ANS Pneumatic air for heating, cooling, anti-ice,
and engine starting.
What places the heaviest demand on the APU? - ANS Load Compressor
What is the APU's starting system? - ANS electrical starter motor and apu battery
Where does the APU draw fuel from? - ANS The main fuel tank
Does APU rpm fluctuate depending on loads? - ANS No, remains constant after start-up
How is the APU EGT modulated? - ANS With the Load Control Valve
Describe the fuel flow of APU - ANS No. 1 tank, APU fuel shutoff valve, fuel heater, fuel
control valve, fuel solenoid valve, turbine fuel nozzles
Function of APU Turbine Wheel - ANS Absorbs the power of the escaping gases of
combustion. The blades in the wheel are NOT for producing thrust
On a B737, at what altitude can an APU provide electrical and pneumatic demand? - ANS 0-
10,000 ft
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 1
ANSWERS GRADED A+ 2026
What does the load compressor provide? - ANS Pneumatic air for heating, cooling, anti-ice,
and engine starting.
What places the heaviest demand on the APU? - ANS Load Compressor
What is the APU's starting system? - ANS electrical starter motor and apu battery
Where does the APU draw fuel from? - ANS The main fuel tank
Does APU rpm fluctuate depending on loads? - ANS No, remains constant after start-up
How is the APU EGT modulated? - ANS With the Load Control Valve
Describe the fuel flow of APU - ANS No. 1 tank, APU fuel shutoff valve, fuel heater, fuel
control valve, fuel solenoid valve, turbine fuel nozzles
Function of APU Turbine Wheel - ANS Absorbs the power of the escaping gases of
combustion. The blades in the wheel are NOT for producing thrust
On a B737, at what altitude can an APU provide electrical and pneumatic demand? - ANS 0-
10,000 ft
@COPYRIGHT 2026/2027 ALLRIGHTS RESERVED 1
