单项选择题
According to Regulations, a power driven auxiliary steering gear for a vessel capable of a 12 knot service speed, must be able to meet the rudder movement requirements at which of the minimum vessel speeds listed below?（）
A.6 knots
B.7 knots
C.9 knots
D.12 knots
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相关考题
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单项选择题
According to Regulations, a power driven auxiliary steering gear for a vessel capable of a 20 knot service speed, must be capable of producing a rudder movement at which of the minimum speeds listed below?（）
A.7 knots
B.10 knots
C.15 knots
D.20 knots -
单项选择题
The follow-up gear on an electro-hydraulic steering gear（）
A.relieves excessive fluid pressure
B.takes the pump off stroke when the desired rudder angle is attained
C.synchronizes wheel position with the rudder position
D.returns the rudder to midposition when the wheel is released -
单项选择题
When the helm demands a 20°right rudder movement from an electro-hydraulic steering gear, which of the listed actions will be the FIRST action to happen when this rudder position is attained?（）
A.The six-way valve opens
B.The steering service pump motor is stopped
C.The follow-up gear takes the pump off stroke
D.The cylinder relief valves bypass oil to the suction side the pump
