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
更多“Most hydraulic steering gears are fitted with relief valves which（）”相关的问题
A、A.hydraulic steering B、B.follow-up steering C、C.remote control steering D、D.air controlled steering
A、A.transmitter at the steering station and a receiver at the steering engine B、B.reversible motor at the steering station geared to the steering pumps C、C.small induction motor on the bridge which controls the redder through pulleys D、D.variable displacement hydraulic pump driven by a reversible DC motor
A、ram relief valves bypass oil to stop rudder movement B、six-way valve shifts to the neutral flow position C、steering pump electric motor is de - energized by the transfer switch D、follow-up gear takes the hydraulic pump off stroke
A、the steering pumps overspeeding B、a jammed open relief vale C、a constantly occurring improper rudder response D、excessive ram pressure
A、rudder will respond sluggishly B、hydraulic rams will over-speed C、sight glass will show bubbles D、ram relief valves will lift
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