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单选题
Two rams of the hydraulic gear are linked at their outer ends to （） by a crosshead and swivel block.
A
the piston rod
B
the tiller arm
C
the connecting rod
D
the rudder
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With reference to a two-ram actuating mechanism, which one of the following statement is FALSE?A.The rams work inside cylinders.B.The cylinders have glands sealing their open ends.C.The rams are connected to a cross-headD.The cross-head is mounted on the rudder stock
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steering pump electric motor is de - energized by the transfer switchD
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单选题Two rams of the hydraulic gear are linked at their outer ends to （） by a crosshead and swivel block.A
the piston rodB
the tiller armC
the connecting rodD
the rudder
考题
单选题When the steering wheel is turned, oil is directed to the steering gear rams by（）A
modulating the oil flow with the six-way valveB
moving the automatic pressure differential valveC
moving the receiving telemotor which regulates the tow-way valveD
varying the eccentricity of a floating ting or angle of a tilting box
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单选题Most totally enclosed lifeboats are equipped with which of the following? （）A
Tanks for the storage of drinking waterB
Ballast tanks to prevent the boat from capsizingC
A hydraulic start diesel engineD
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单选题Hydraulically, servo-operated, automatic, change over valves, utilized in a two ram hydraulic steering gear, serve to（）A
allow an alternate main pump to start in the fully loaded condition thus developing immediate full torqueB
prevent either main pump from being hydraulically motored when idle by cross pressure flowC
prevent both units from operating simultaneously which could result in doubling the flow of oil and pressure leading to over pressurization of the systemD
all of the above
考题
单选题The function of the hydraulic telemotor transmitter used in an electro-hydraulic steering gear system is to （）.A
transmit the rudder angle to the bridge indicatorB
prevent the control linkage from striking the stops when hard overC
automatically purge all entrained air from the systemD
send hydraulic signals to the receiving unit
考题
单选题Before starting an engine by air, the engine must（）A
be turned by a turning gear for at least one minuteB
be turned by a turning gear for at least two minutesC
be turned at least one complete turnD
be turned at least two complete turns
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单选题Diesel engine air start valve timing is controlled by（）A
engine operating speedB
an air manifoldC
a hydraulic distributorD
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单选题The control rod of a steering gear pump is attached at its outer end to （）.A
the hunting gearB
the rudder stockC
the rudder controllerD
the feedback unit
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单选题A tackle by which the outer end of a boom is raised and lowered is the topping（）.A
boomB
liftC
raiseD
tackle
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Rotation of the steering wheel on the navigation bridge initiates oil pressure being applied to the steering gear rams by （）.A
regulating the oil flow with the six-way valveB
moving the automatic differential valveC
moving the receiving tele-motor which regulates the two-way valveD
varying the angle of a tilting box or eccentricity of a floating ring
考题
单选题With reference to a two ram actuating mechanism, which one of the following statement is false?（）A
The rams work inside cylindersB
The cylinders have glands sealing their open endsC
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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 steeringB
Overheating of the gyrocompassC
Jamming of the six-way valeD
Jamming of the follow-up device
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单选题Which of the following problems will occur if the internal drain at either end of a hydraulic, two-way, spool-type directional control valve cylinder were to become plugged?（）A
The reservoir would become vapor boundB
The valve would be placed in hydraulic lockC
The spring loaded relief ports would openD
The buffering chambers would be unable to function
考题
单选题（） for the camshaft gear train is taken from a spur gear which for a six cylinder engine is at the coupling end.A
The driven gearB
The driveC
The greaseD
The lubricating oil
考题
单选题When air becomes trapped in the hydraulic fluid of a steering system, the （）.A
rudder will respond sluggishlyB
hydraulic rams will over-speedC
sight glass will show bubblesD
ram relief valves will lift
考题
单选题Pitting in the area close to the pitch line and on the same end of each gear tooth of a reduction gear unit would be caused by （）A
corrosion on the gearsB
excessive gear speedC
dirt in the oilD
misalignment of the gears
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When the steering gear is in operation, you should （）.A
check hydraulic oil levels every hourB
check the rams for overheatingC
check for excessive oil leakage from ramsD
drain water from telemotor cylinders each watch
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单选题A power failure in the hydraulic system of a compact type steering gear would cause the rudder to（）A
swing 35°right or leftB
remain locked in its last positionC
move to the mid-ship position automaticallyD
jam against the rudder emergency stops
考题
单选题With reference to rules governing steering gear, which one of the following rules is incorrect? （）A
It is required that all ships are provided with two independent steering gear systems that is one main and one auxiliaryB
The auxiliary gear could be power operated in passenger shipsC
The auxiliary gear must be of adequate strength and sufficient to steer a ship at navigable speedD
All moving parts of the steering gear must be guarded against any possible damage
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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单选题In an electro-hydraulic steering gear, any change in relative position between the synchronous receiver and the follow-up gear will result in（）A
the pump going to full strokeB
closing of the six-way valveC
driving the rams up against the stopsD
a corresponding slowing or increasing of the pumped flow rate
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