单项选择题

When the steering wheel is turned, oil is directed to the steering gear rams by（）

A.modulating the oil flow with the six-way valve
B.moving the automatic pressure differential valve
C.moving the receiving telemotor which regulates the tow-way valve
D.varying the eccentricity of a floating ting or angle of a tilting box

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单项选择题

Rudder position is shown on the bridge by the（）

A.rudder angle indicator
B.follow-up gear
C.telemotor position
D.relief valves

单项选择题

In an elector-hydraulic steering system, rudder shock is limited by（）

A.a differential gear
B.return springs
C.a hydraulic accumulator
D.relief valves

单项选择题

Most hydraulic steering gears are fitted with relief valves which（）

A.function when the rudder is amidships
B.relieve excess whip pressure from the hydraulic oil system
C.protect the piping assembly from external rudder shock
D.relieve excessive telemotor pressure