Test yourself: 5 hard theory questions, free Airspace, weather, regs and aerodynamics, FAA-style — instant score, every answer explained. No signup.
Free testmediumhydraulic-systems
A variable-displacement pump adjusts output by:
A
Changing the motor RPM
B
Changing the number of active pistons
C
Opening a bypass valve
D
Varying the swashplate angle to change piston stroke
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See where you stand: 5 hard questions, instant score, every answer explained.