题目内容

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

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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

With total hydraulic power failure, the ailerons can be mechanically positioned by rotating the pilot’s control wheels. Control forces are higher due to friction and _________ loads.

A. aerodynamic
B. stable
C. mechanical
D. structural

The flaps and _________ are high lift devices that increase wing lift and decrease stall speed during takeoff, low speed maneuvering and landing.

A. elevators
B. rudder
C. ailerons
D. slats