水压力（hydraulic pressure）

题目

水压力（hydraulic pressure）

相似考题

1.Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?A.Pressure-reducing valveB.Unloading valveC.Counterbalance valveD.Pressure-relief valve

2.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

3.Before performing any maintenance on a hydraulic system storing energy in an accumulator, you shouldA.pressurize the system to test for leaksB.bleed off all pressure within the systemC.operate the machine until it reaches normal temperatureD.disconnect the pump pressure control switch

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“水压力（hydraulic pressure）”相关问题

  • 第1题：

    The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by_______.

    A.large conical springs

    B.compressed air pressure

    C.hydraulic pressure

    D.exhaust gas pressure


    正确答案：B

  • 第2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3题：

    A certificated lifeboatman assigned to command the lifeboat must ______.

    A.be the first individual to board the craft

    B.drain the hydraulic pressure before lowering the craft

    C.have a list of the persons assigned to the liftboat

    D.all of the above


    正确答案：C
    合格的救生艇艇长应持有该艇船员名单。

  • 第4题：

    单选题
    In a hydraulic system, （） are used to protect the system from over pressure.
    A

    stop valves

    B

    check valves

    C

    safety valves

    D

    reducing valves


    正确答案： C
    解析： 暂无解析

  • 第5题：

    单选题
    （）can be used to prevent hydraulic system overloaded or keep the pressure of oil outlet from pump constant.
    A

    Overflow valve

    B

    Reducing valve

    C

    Balancing valve

    D

    Reducing valve or balancing valve


    正确答案： D
    解析： 暂无解析

  • 第6题：

    单选题
    In a fixed displacement axial piston hydraulic motor, the speed is varied by（）
    A

    regulating the ratio between torque and speed via the torque limiter at the motor

    B

    directing the motor output flow through a bypass line

    C

    maintaining a constant flow and pressure input

    D

    controlling the input flow rate


    正确答案： A
    解析： 暂无解析

  • 第7题：

    单选题
    A reservoir, as used in hydraulic systems aboard ship, is used to store hydraulic oilAnother function is to（）
    A

    act as a shock absorber

    B

    maintain the stored oil under pressure

    C

    act as a base or foundation for the power unit

    D

    eliminate pressure surges in the system


    正确答案： B
    解析： 暂无解析

  • 第8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： B
    解析： 暂无解析

  • 第9题：

    单选题
    Pressure in an operating hydraulic system is developed （）.
    A

    only by the pump as its primary function

    B

    by resistance to the fluid flow through the system

    C

    by the thermal input to the systems fluid

    D

    solely by the charge applied by the accumulators


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    The device used to store a charged pressure for a hydraulic starting system is called the（）
    A

    reservoir

    B

    hand pump

    C

    accelerator

    D

    accumulator


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    An axial piston, variable stroke pump is used in a vessels hydraulic steering gearUnder pressure, oil continually leaks out from between the valve plate/cylinder barrel and will（）.
    A

    cause loss of hydraulic oil from the system

    B

    result in extreme damage to the pump

    C

    cause damage to the pump ff not continually drained from the pump casing

    D

    result in the system high side pressure to substantially drop off


    正确答案： A
    解析： 暂无解析

  • 第12题：

    单选题
    Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?（）
    A

    Pressure-reducing valve

    B

    Unloading valve

    C

    Counterbalance valve

    D

    Pressure-relief valve


    正确答案： C
    解析： 暂无解析

  • 第13题：

    What type of valve is used to direct the flow of hydraulic fluid?

    A.relief valve

    B.direction control valve

    C.stop valve

    D.pressure control valve


    正确答案：B

  • 第14题：

    Pressure drop in an operating hydraulic system is developed ______.

    A.only by the pump as its primary function

    B.by resistance to the fluid flow through the system

    C.by the thermal input to the system's fluid

    D.solely(单独地) by the charge applied by the accumulators


    正确答案：B

  • 第15题：

    静压力（static pressure）


    正确答案: 静压力是上覆地层引起的负荷压力。

  • 第16题：

    单选题
    A marine diesel engine is started by（）
    A

    supplying high pressure oil into a hydraulic motor

    B

    supplying high temperature air into the cylinder

    C

    supplying high pressure air into the cylinder

    D

    electrical igniting


    正确答案： C
    解析： 暂无解析

  • 第17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18题：

    单选题
    Most hydraulic steering gears are fitted with relief valves which（）
    A

    function when the rudder is amidships

    B

    relieve excess whip pressure from the hydraulic oil system

    C

    protect the piping assembly from external rudder shock

    D

    relieve excessive telemotor pressure


    正确答案： C
    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
    Flexible hose under pressure in a hydraulic system will （）.
    A

    tend to twist about its long axis

    B

    expand in length and in diameter

    C

    contract in length and expand in diameter

    D

    flex at right angles to the applied pressure


    正确答案： C
    解析： 暂无解析

  • 第21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 shift

    B

    the bleeder valve sticking in the open position

    C

    cold hydraulic fluid

    D

    a clogged air vent falter on the oil reservoir


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    Which of the following hydraulic systems is not one of the three sub-division of the Hydraulic drive system?（）
    A

    Constant pressure system

    B

    Variable pressure system

    C

    Variable displacement system

    D

    Constant volume system


    正确答案： D
    解析： 暂无解析

  • 第23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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