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单选题
Air trapped in the hydraulic fluid of a steering system should be indicated by （）.
A
the pump over-speeding
B
an improper rudder response
C
bubbles in the sight glass
D
ram relief valves lifting
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单选题Air trapped in the hydraulic fluid of a steering system would be indicated by（）A
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单选题How can the chance of contaminating hydraulic fluid be decreased when working on hydraulic system?（）A
clean the fittings before they are disconnectedB
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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
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单选题The follow-up gear on an electro-hydraulic steering gear（）A
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takes the pump off stroke when the desired rudder angle is attainedC
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returns the rudder to midposition when the wheel is released
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单选题In an elector-hydraulic steering system, rudder shock is limited by（）A
a differential gearB
return springsC
a hydraulic accumulatorD
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单选题A hydraulic accumulator is designed to（）.A
store fluid under pressureB
act as a fluid reservoirC
provide overpressure reliefD
replenish fluid to a system
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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
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单选题In a shell-and-tube type hydraulic fluid cooler, the amount of heat transferred from the hydraulic fluid to the cooling water depends upon（）A
the temperature of the hydraulic fluidB
the flow rate of the hydraulic fluidC
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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Hydraulic machinery failures are commonly caused by misalignment of the system components and by （）.A
hydraulic fluid contaminationB
excessive fluid frictionC
turbulent fluid flowD
fluid pressure surges
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