A、with both pumps on line at the same time
B、with one pump on standby
C、with the follow-up gear disconnected
D、only when the rudder is moved amidships
更多“Dual electro-hydraulic steering units usually operate （）.”相关的问题
A、Electro-hydraulic units B、Steam units C、Independent internal combustion power units D、All of the above
A、transmit the rudder angle to the bridge indicator B、prevent the control linkage from striking the stops when hard over C、automatically purge all entrained air from the system D、send hydraulic signals to the receiving unit
A、Rudder angle indicator B、Follow-up gear C、Electric transmitter D、Rudder angle limit switch
A、Loss of vessel steering B、Overheating of the gyrocompass C、Jamming of the six-way vale D、Jamming of the follow-up device
A、set for maximum torque B、on the purge and vent stroke C、in the neutral position D、rotating backwards
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
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