Leakage of hydraulic fluid from around the shaft of a hydraulic motor may be caused by ______.A.permanent loss of pump suctionB.worn shaft sealsC.high level in the oil sumpD.low motor RPM

题目

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

相似考题

1.Overheating of the hydraulic fluid in an electro-hydraulic anchor windlass can result from a/an( ).A.overload on the pump motorB.low fluid level in the reservoirC.low fluid viscosity around the shaft sealD.high oil level in the sump

2.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

3.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

4.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

更多“Leakage of hydraulic fluid from around the shaft of a hydraulic motor may be caused by ___ ”相关问题

  • 第1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2题：

    When the steering gear is in operation, you should ______.

    A.check hydraulic oil levels every hour

    B.check the rams for overheating

    C.check for excessive oil leakage from rams

    D.drain water from tele-motor cylinders each watch


    正确答案：C

  • 第3题：

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

    excessive drive motor speed

    B

    excessive pump discharge pressure

    C

    too low of a tilting box angle

    D

    insufficient drive motor speed


    正确答案： A
    解析： 暂无解析

  • 第4题：

    单选题
    In the design of hydraulic piping and equipment consideration is given to minimize turbulence in the hydraulic fluid, as this will cause（）
    A

    molecular fluid vibration

    B

    energy losses

    C

    wide pressure variations

    D

    mechanical damage to control valves


    正确答案： A
    解析： 暂无解析

  • 第5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6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7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8题：

    单选题
    The major cause of trouble in a mechanical-hydraulic governor is contamination of the hydraulic fluid by （）
    A

    dirt

    B

    fuel oil

    C

    governor cooling water

    D

    fuel oil tars


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    External and internal leakage in hydraulic systems may be caused by （）.
    A

    unusual vibration

    B

    excessive worn parts

    C

    abnormal pressure

    D

    any of the above


    正确答案： D
    解析： 暂无解析

  • 第10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11题：

    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 fluid

    B

    the flow rate of the hydraulic fluid

    C

    the temperature of the cooling water

    D

    all of the above


    正确答案： A
    解析： 暂无解析

  • 第12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

  • 第13题：

    A hydraulic motor may be driven by______.

    A.an electric motor

    B.a diesel engine

    C.a compressor

    D.oil


    正确答案：D

  • 第14题：

    The major cause of trouble in a mechanical-hydraulic governor is contamination of the hydraulic fluid by ______.

    A.dirt

    B.fuel oil

    C.governor cooling water

    D.fuel oil tar(焦油)


    正确答案：A

  • 第15题：

    单选题
    A hydraulic motor may be driven by （）.
    A

    an electric motor

    B

    a diesel engine

    C

    a compressor

    D

    oil


    正确答案： A
    解析： 暂无解析

  • 第16题：

    单选题
    The most common contaminate of governor hydraulic fluid is （）.
    A

    moisture

    B

    dirt

    C

    acid

    D

    air


    正确答案： B
    解析： 暂无解析

  • 第17题：

    单选题
    If you are given the job of adding hydraulic fluid to a mooring winch, and are not certain as to the type of fluid to use, you should （）.
    A

    add fluid that is the same color as the fluid in the reservoir

    B

    add turbine oil because it is always a good substitute

    C

    add any oil that has the same viscosity as the hydraulic fluid

    D

    check the winch manufacturers instruction book


    正确答案： C
    解析： 暂无解析

  • 第18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19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20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21题：

    单选题
    When the steering gear is in operation, you should （）.
    A

    check hydraulic oil levels every hour

    B

    check the rams for overheating

    C

    check for excessive oil leakage from rams

    D

    drain water from telemotor cylinders each watch


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    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
    解析： 暂无解析

  • 第23题：

    单选题
    If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
    A

    a low load on the unit

    B

    a clogged pump suction strainer

    C

    a blockage in the line between the pump and hydraulic motor

    D

    the hydraulic motor turning too fast


    正确答案： C
    解析： 暂无解析

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