单项选择题
A.Rudder angle indicator B.Follow-up gear C.Electric transmitter D.Rudder angle limit switch
Rudder motion is prevented from exceeding the movement ...
单项选择题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
Air trapped in the hydraulic fluid of a steering system...
单项选择题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
The purging of air from an elector-hydraulic steering g...
单项选择题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
