單項(xiàng)選擇題Rudder motion is prevented from exceeding the movement of the steering wheel by the（）

A.return springs
B.six-way valve
C.follow-up gear
D.differential gear


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1.單項(xiàng)選擇題Air trapped in the hydraulic fluid of a steering system may be indicated by（）

A.the steering pumps overspeeding
B.a jammed open relief vale
C.a constantly occurring improper rudder response
D.excessive ram pressure

2.單項(xiàng)選擇題The purging of air from an elector-hydraulic steering gear unit is necessary when（）

A.changing over to hand pump operation
B.engaging the trick wheel
C.the system has been filled with new oil
D.the rudder angle indicator does not match the helm position

3.單項(xiàng)選擇題If a severe leak develops in the electro-hydraulic steering gear unit is necessary when（）

A.Loss of vessel steering
B.Overheating of the gyrocompass
C.Jamming of the six-way vale
D.Jamming of the follow-up device

4.單項(xiàng)選擇題A power failure in the hydraulic system of a compact type steering gear would cause the rudder to（）

A.swing 35°right or left
B.remain locked in its last position
C.move to the mid-ship position automatically
D.jam against the rudder emergency stops