Test yourself: 5 hard theory questions, free Airspace, weather, regs and aerodynamics, FAA-style — instant score, every answer explained. No signup.
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The APU is usually started using:
A
Engine bleed air
B
Ground power only
C
Its own battery or the aircraft battery
D
Hydraulic motor
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See where you stand: 5 hard questions, instant score, every answer explained.