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单选题
Steering gears can be arranged with hydraulic control equipment known as a （）, or with electrical control equipment.
A
telemeter
B
telemanometer
C
telemotor
D
telemometer
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If one hydraulic pump of an electro-hydraulic steering unit fails, the vessel’s steering can be initially and best maintained by using the ______.A.trick wheelB.accumulatorC.standby pumpD.Telemotor
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单选题Generally，you can best keep a vessel under steering control when the vessel has（）.A
HeadwayB
SternwayC
No way on，with engines stoppedD
No way on，with engines full ahead
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单选题Air trapped in the hydraulic fluid of a steering system would be indicated by（）A
an improper rudder responseB
hammering noises in the equipment or transmission linesC
popping or sputtering noisesD
all the above
考题
单选题Most hydraulic steering gears are fitted with relief valves which（）A
function when the rudder is amidshipsB
relieve excess whip pressure from the hydraulic oil systemC
protect the piping assembly from external rudder shockD
relieve excessive telemotor pressure
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单选题Hydraulic pumps most commonly used in steering systems are of the （）.A
lobe typeB
screw typeC
axial piston typeD
volute type
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单选题What type of valve is used to direct the flow of hydraulic fluid?（）A
Relief valveB
Direction control valveC
Stop valveD
Pressure control valve
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单选题It is important with all hydraulic systems to ensure that interlocking arrangements provided for pump or motor control levers are （） before the pump driving motor can be started.A
in the pert positionB
in the starboard positionC
in the neutral positionD
to be dismantled
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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
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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
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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
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air controlled steering
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balance pistonC
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principleB
mediumC
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voltage
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单选题In （） the control action is independent on(of) the output.A
a closed loop control systemB
an open loop control systemC
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单选题In （）the control action is independent on the output.A
a closed loop control systemB
an open loop control systemC
a boiler control systemD
a steering gear
考题
单选题A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.A
the four-way control valve failing to shiftB
the bleeder valve sticking in the open positionC
cold hydraulic fluidD
a clogged air vent falter on the oil reservoir
考题
单选题In an elector-hydraulic steering system, rudder shock is limited by（）A
a differential gearB
return springsC
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relief valves
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单选题Which of the following types of hydraulic pumps would be used in a steering system?（）A
LobeB
ScrewC
Radial pistonD
Volute
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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
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
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单选题Cocks and valves control or interrupt flow, and have internal passages arranged so that they can be restricted or closed: in cocks, by rotating the plug, and in valves, by lowering, raising or rotating a disc in relation to a seating surfaceAccording to the above sentence, which of the following statements is not true?（）A
Flows of fluids can be restricted by both cocks and valvesB
There are seats in the internal passages of valvesC
A disc of valve only moves up and downD
We can infer that there is a bore in cock ping
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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
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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
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单选题The hydraulic （） is used to control engine speed.A
motorB
pumpC
governorD
capstan
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