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单选题
If a severe leak develops in the electro-hydraulic steering gear unit is necessary when（）
A
Loss of vessel steering
B
Overheating of the gyrocompass
C
Jamming of the six-way vale
D
Jamming of the follow-up device
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The follow-up gear on an electro-hydraulic steering gearA.relieves excessive fluid pressureB.takes the pump off stroke when the desired rudder angle is attainedC.allows for rudder movement faster than the movement of the shipsD.returns the rudder to amidships when the wheel is release
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The “Port-Off-Stbd” selector switch on an autopilot steering stand is used to ______．A.change from hand electric steering to automatic gyroB.change over one steering system to the otherC.change over hand electric steering to non-follow-upD.change over the port to the starboard bow thruster
考题
When the helm is turned on the navigation bridge，which of the listed actions will be the FIRST response in the steering room on a ship equipped with an electro-hydraulic steering gear ________．A.The pumps go to full strokeB.The six-way valve aligns itself with the running pumpC.Both port and starboard cables are energizedD.The synchronous receiver turns，duplicating the helm motion
考题
In an electro-hydraulic steering system, rudder movement is maitained in close synchronization with the steering wheel position by means of the ______.A.trick wheelB.follow-up controlC.six-way valveD.Rapson slide
考题
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B.So severe was the storm
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D.Such was the storm severe
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考题
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
follow-up gear takes the hydraulic pump off stroke
考题
单选题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 opensB
The steering service pump motor is stoppedC
The follow-up gear takes the pump off strokeD
The cylinder relief valves bypass oil to the suction side the pump
考题
填空题The interactionalist’s position is that language develops as a result of the complex（）between the uniquely human characteristics of the child and the environment in which the child develops.
考题
单选题Dry cargoes are those commodities that（）.A
never leak but may be spoiled by leakageB
sometimes leak and damage themselvesC
often leak and damage other cargoD
neither leak nor will be damaged by leakage
考题
单选题An AC synchronous transmission type remote steering control system consists of a （）.A
transmitter at the steering station and a receiver at the steering engineB
reversible motor at the steering station geared to the steering pumpsC
small induction motor on the bridge which controls the redder through pulleysD
variable displacement hydraulic pump driven by a reversible DC motor
考题
单选题Your vessel is taking on fuel oil when a small leak develops in the hose and you have ordered the pumping stoppedBefore resuming pumping，you should（）.A
notify the terminal superintendentB
place a large drip pan under the leak and ping the scuppersC
repair the hose with a patchD
replace the hose
考题
单选题According to the way the steering gear is operated, the steering gear may be divided into: hand - steering, （） and automatic steering.A
hydraulic steeringB
follow-up steeringC
remote control steeringD
air controlled steering
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单选题The Prudhoe Bay oilfield has been shut down because ______.A
there was a serious leakage problem with the pipelineB
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the newly-replaced pipeline didn’t work properly
考题
单选题Dual electro-hydraulic steering units usually operate （）.A
with both pumps on line at the same timeB
with one pump on standbyC
with the follow-up gear disconnectedD
only when the rudder is moved amidships
考题
单选题Which statement best describes echo?（）A
Echo is the discernable leak-through of your own Rx path into your own Tx path. B
Echo is the discernable leak-through of the packets of your Rx path into your own Tx path. C
Echo is the nonaudible leak-through of the packets of your Rx path into your own Tx path. D
Echo is the audible leak-through of the packets from the transmit path into your own receive path. E
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考题
单选题In an electro-hydraulic steering gear system, when will the variable displacement pump be placed on stroke?（）A
When the helm is at any angle other than amidshipsB
When the six-way valve is openedC
When the ram relief valves liftD
When the redder angle is different from the position of the helm
考题
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
考题
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
The synchronous electric transmitterD
A rudder angle limit switch
考题
单选题In an electro-hydraulic steering system, under movement is maintained in close synchronization with the steering wheel position by means of the （）.A
trick-wheelB
follow-up controlC
six-way valveD
Rapson slide
考题
单选题In an emergency，the electro-hydraulic steering units can be directly controlled by the（）.A
trick wheelB
rapson slideC
follow-up gearD
receiver unit
考题
单选题The hand steering is a method by which the motion of the rudder is controlled with （）.A
a motor-driven steering wheelB
a pneumatic steering wheelC
a hand-driven steering wheelD
an electric steering wheel
考题
单选题If one hydraulic pump of an electro-hydraulic steering unit falls, the vessels steering can be initially and best maintained by using the （）.A
trick wheelB
accumulatorC
standby pumpD
telemotor
考题
单选题When there is no movement of the rams on an electro-hydraulic steering gear, the tilting box of the running pump is （）.A
set for maximum torqueB
on the purge and vent strokeC
in the neutral positionD
rotating backwards
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