题目内容

Hydraulic shutoff valves can be used to _________ each aileron, as well as the elevators and rudder, from related hydraulic system pressure.

A. isolate
B. engage
C. deflect
D. command

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The roll control surfaces consist of hydraulically powered ailerons and flight spoilers which are controlled by _________ either control wheel.

A. Pulling
B. dialing
C. rolling
D. rotating

Either hydraulic system A or B can operate all primary flight controls. Ailerons and elevators can be operated _________ if required.

A. manually
B. electrically
C. hydraulically
D. automatically

The pitch control surfaces consist of hydraulically powered elevators and an electrically powered _________.

A. yaw damper
B. stabilizer
C. spoiler
D. actuator

The main PCU consists of two _________ input rods, two individual control valves, and two separate actuators: one for hydraulic system A and one for hydraulic system B.

A. similar
B. identical
C. dependent
D. independent

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