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单选题
rudder angle indicator（）
A
吃水指示器
B
舱机
C
舵角指示器
D
六分仪
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单选题When the desired rudder angle is attained by a typical double mm electro-hydraulic steering gear,the（）.A
ram relief valves bypass oil to stop rudder movementB
six-way valve shifts to the neutral flow positionC
steering pump electric motor is de - energized by the transfer switchD
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单选题The actual rudder angle reading is（）A
the rudder angle indicator readingB
the desired rudder angle readingC
the measured rudder angle readingD
the intended rudder angle reading
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单选题The test of a towing vessel’s steering gear control system includes each item EXCEPT（）.A
a test from the alternative power supply，if installedB
timing the movement of the rudder from hard over to hard overC
verification that the rudder angle indicator shows the actual position of the rudder(s)D
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单选题The purging of air from an elector-hydraulic steering gear unit is necessary when（）A
changing over to hand pump operationB
engaging the trick wheelC
the system has been filled with new oilD
the rudder angle indicator does not match the helm position
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单选题Rudder position is shown on the bridge by the（）A
rudder angle indicatorB
follow-up gearC
telemotor positionD
relief valves
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单选题（）conveys a signal of desired rudder angle from the bridge and activates the power unit and transmission system unit the desired angle is reached.A
The control equipmentB
The power unitC
The transmission systemD
The follow-up mechanism
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单选题The required rudder angle is transmitted hydraulically or electrically from the steering wheel at the bridge to the （）at the steering gear, just above the rudder.A
transmitterB
tele-motorC
hydraulic ramD
hydraulic cylinder
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单选题The boom indicator tells the operator at what angle the boom is compared to the（）.A
horizontal position of the boomB
vertical position of the boomC
horizontal position of the load being liftedD
vertical position of the load being lifted
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单选题The follow-up gear on an electro-hydraulic steering gear（）A
relieves excessive fluid pressureB
takes the pump off stroke when the desired rudder angle is attainedC
synchronizes wheel position with the rudder positionD
returns the rudder to midposition when the wheel is released
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单选题Which of the devices listed, when used on an electro-hydraulic steering gear, keeps the movement of the redder closely in step with the steering wheel?（）A
The follow-up gearB
The rudder angle indicatorC
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A rudder angle limit switch
考题
单选题While inspecting the steering system at sea, you should check for （）.A
air bubbles in the sight glassB
any leaks in the systemC
over-travel in the rudder angle indicatorD
lost motion in the rams
考题
单选题0n a crane ,the boom indicator tells the operator what angle the boom angle is compared to the（）.A
vertical positionB
horizontal positionC
boom stop angleD
minimum radius angle
考题
单选题On an electro-hydraulic steering gear, which of the listed devices will keep the rudder from over-traveling the bridge signal?（）A
Rudder angle indicatorB
Follow-up gearC
Electric transmitterD
Rudder angle limit switch
考题
单选题When relieving the helm，the new helmsman should know the（）.A
Course per magnetic steering compassB
Gyro errorC
VariationD
Maximum rudder angle previously used
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