单选题Air trapped in the hydraulic fluid of a steering system may be indicated by（）A the steering pumps overspeedingB a jammed open relief valeC a constantly occurring improper rudder responseD excessive ram pressure

题目
单选题
Air trapped in the hydraulic fluid of a steering system may be indicated by（）
A

the steering pumps overspeeding

B

a jammed open relief vale

C

a constantly occurring improper rudder response

D

excessive ram pressure

相似考题

1.If you install a new hydraulic hose in a hydraulic system, the hose must be long enough to allow for contraction to preventA.failure of the hydraulic hoseB.excessive flow through the lineC.friction in other areas of the hydraulic systemD.overheating of the hydraulic fluid

2.Before doing any work on a hydraulic system equipped with accumulators, you shouldA.drain the accumulators and purge with oxygenB.bleed off all stored energy from the accumulators completelyC.charge the accumulators to prevent system energy lossD.pump the hydraulic fluid into the accumulators to prevent fluid loss

3.After installing a new hydraulic pump in a system, what special attention should be given to the hydraulic system?A.The relief valves in the system should be readjustedB.The filters and strainers should be checked frequentlyC.All system pressure should be readjustedD.The system should be drained and renewed with a fluid of different operating characteristics

4.Air trapped in the hydraulic fluid of a steering system may be indicated byA.the steering pumps overspeedingB.a jammed open relief valveC.a constantly occurring improper rudder responseD.excessive ram pressure

更多“Air trapped in the hydraulic fluid of a steering system may”相关问题

  • 第1题：

    Leakage of hydraulic fluid from around the shaft of a hydraulic motor may be caused by ______.

    A.permanent loss of pump suction

    B.worn shaft seals

    C.high level in the oil sump

    D.low motor RPM


    正确答案：B

  • 第2题：

    材料：

    At 1800，the hydraulic steering system failed once again．The master realized he would require shore assistance to rectify the problem，and diverted towards Portland using the thruster to steer by．The weather at this time was south-south-west force 5．At about three hours later，the thruster drive unit failed due to a leaking fuel injector pipe on the power unit．This was replaced using the spare carried on board．Immediately following the engine restart，an adjacent fuel line failed causing shut down of the unit．With no fuel line spares available，the thruster power unit could not be used．The failure of this unit，and that of the main hydraulic steering system，left the vessel without any steering capability．

    At 2155，with the weather deteriorating and no steering，the master contacted the Portland Coastguard and a“Pan pan”message was broadcast．A tow to Portland Harbor was arranged and she arrived alongside at 0240 the following morning．The subsequent investigation found that the main hydraulic steering system failure was due to a seized shuttle valve in the main hydraulic solenoid valve block．The solenoid valve had been recently overhauled．It was thought that the“O”rings fitted to the shuttle valve were of either the wrong type or a defective one．The valve had seized in such a position that hydraulic pressure by-passed the system preventing use of the hand steering．

    问题：

    The vessel was steered by thruster because ________ failed．

    A.the hydraulic steering system

    B.the solenoid valve

    C.the thruster driving unit

    D.the hand steering

    The time that the thruster drive unit failed was ________ hrs．A.1800

    B.2100

    C.2155

    D.0240

    When the hydraulic steering system failed，________．A.the hand steering system could still be used

    B.the auto steering system could still be used

    C.both hand and auto steering system were out of use

    D.neither and steering system nor auto steering system was out of use

    The real reason that caused the hydraulic steering system to fail was that ________．A.no fuel line spare were available

    B.the weather was deteriorating

    C.the“O”rings fitted to the shuttle valve were of either the wrong type or a defective one

    D.the thruster power unit failed

    请帮忙给出每个问题的正确答案和分析，谢谢！


    问题 1 答案解析：A


    问题 2 答案解析：B


    问题 3 答案解析：C


    问题 4 答案解析：C

  • 第3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 wheel

    B.follow-up control

    C.six-way valve

    D.Rapson slide


    正确答案：B
    在一个电动液压转向系统，舵运动通过随动装置保持与方向盘位置同步。

  • 第4题：

    单选题
    The purging of air from an elector-hydraulic steering gear unit is necessary when（）
    A

    changing over to hand pump operation

    B

    engaging the trick wheel

    C

    the system has been filled with new oil

    D

    the rudder angle indicator does not match the helm position


    正确答案： C
    解析： 暂无解析

  • 第5题：

    单选题
    What is the best way of stopping an over-speeding diesel engine?（）
    A

    Disconnect the battery cables from the starting motor

    B

    Drain the hydraulic fluid from the governor sump

    C

    Block the flow of cooling air to the radiator

    D

    Secure the fuel supply and block the air intake


    正确答案： D
    解析： 暂无解析

  • 第6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 engine

    B

    reversible motor at the steering station geared to the steering pumps

    C

    small induction motor on the bridge which controls the redder through pulleys

    D

    variable displacement hydraulic pump driven by a reversible DC motor


    正确答案： C
    解析： 暂无解析

  • 第7题：

    单选题
    A hydraulic accumulator aboard a ship is designed to（）.
    A

    store fluid under pressure

    B

    act as a fluid reservoir

    C

    provide overpressure relief

    D

    replenish fluid to a system


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    Before doing any work on a hydraulic system equipped with accumulators, you should（）
    A

    drain the accumulators and purge with oxygen

    B

    bleed off all stored energy from the accumulators completely

    C

    charge the accumulators to prevent system energy loss

    D

    pump the hydraulic fluid into the accumulators to prevent fluid loss


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    An orifice-check valve placed in a hydraulic system is used to（）
    A

    regulate the fluid flow in either direction

    B

    restrict movement of hydraulic fluid in one direction, but allow free movement in the other direction

    C

    allow free movement of hydraulic fluid in both directions

    D

    allow a restricted fluid flow in one direction only


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    When air becomes trapped in the hydraulic fluid of a steering system, the （）.
    A

    rudder will respond sluggishly

    B

    hydraulic rams will over-speed

    C

    sight glass will show bubbles

    D

    ram relief valves will lift


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    A hydraulic accumulator is designed to（）.
    A

    store fluid under pressure

    B

    act as a fluid reservoir

    C

    provide overpressure relief

    D

    replenish fluid to a system


    正确答案： A
    解析： 暂无解析

  • 第12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-wheel

    B

    follow-up control

    C

    six-way valve

    D

    Rapson slide


    正确答案： B
    解析： 暂无解析

  • 第13题：

    Hydraulic machinery failures are commonly caused by contamination of the hydraulic fluid and ______.

    A.fluid friction

    B.fluid turbulence

    C.component misalignment

    D.pressure surges


    正确答案：C

  • 第14题：

    A hydraulic accumulator aboard a ship is designed to ______.

    A.store fluid under pressure

    B.act as a fluid reservoir

    C.provide overpressure relief

    D.replenish fluid to a system


    正确答案：A
    船上的液体储存器被设计为用来储存液体的压力之下。

  • 第15题：

    单选题
    Air trapped in the hydraulic fluid of a steering system would be indicated by（）
    A

    an improper rudder response

    B

    hammering noises in the equipment or transmission lines

    C

    popping or sputtering noises

    D

    all the above


    正确答案： A
    解析： 暂无解析

  • 第16题：

    单选题
    Overheating of a hydraulic system may be a result of （）.
    A

    changing pump discharge pressure in response to normal load variations

    B

    a high oil level

    C

    incorrect fluid viscosity

    D

    continued slow re-circulation of the oil


    正确答案： C
    解析： 暂无解析

  • 第17题：

    单选题
    After installing a new hydraulic pump in a system, what special attention should be given to the hydraulic system?（）
    A

    The relief valves in the system should be readjusted

    B

    The filters and strainers should be checked frequently

    C

    All system pressure should be readjusted

    D

    The system should be drained and renewed with a fluid of different operating characteristics


    正确答案： A
    解析： 暂无解析

  • 第18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 indicator

    B

    prevent the control linkage from striking the stops when hard over

    C

    automatically purge all entrained air from the system

    D

    send hydraulic signals to the receiving unit


    正确答案： A
    解析： 暂无解析

  • 第19题：

    单选题
    If a hydraulic pump is overheating, the cause may be （）.
    A

    excessive internal leakage in the pump

    B

    low discharge pressure and fluid flow

    C

    excessive fluid level in the hydraulic reservoir

    D

    operation of the pump at 100% efficiency


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    Air trapped in the hydraulic fluid of a steering system may be indicated by（）
    A

    the steering pumps overspeeding

    B

    a jammed open relief vale

    C

    a constantly occurring improper rudder response

    D

    excessive ram pressure


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    Leakage of hydraulic fluid from around the shaft of a hydraulic motor may be caused by（）
    A

    permanent loss of pump suction

    B

    worn shaft seals

    C

    high level in the oil sump

    D

    low motor RPM


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    In an elector-hydraulic steering system, rudder shock is limited by（）
    A

    a differential gear

    B

    return springs

    C

    a hydraulic accumulator

    D

    relief valves


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    Which of the following types of hydraulic pumps would be used in a steering system?（）
    A

    Lobe

    B

    Screw

    C

    Radial piston

    D

    Volute


    正确答案： C
    解析： 暂无解析

  • 第24题：

    单选题
    Hydraulic machinery failures are commonly caused by misalignment of the system components and by （）.
    A

    hydraulic fluid contamination

    B

    excessive fluid friction

    C

    turbulent fluid flow

    D

    fluid pressure surges


    正确答案： C
    解析： 暂无解析

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