A hydraulic motor may be driven by______.A.an electric motorB.a diesel engineC.a compressorD.oil

题目

A hydraulic motor may be driven by______.

A.an electric motor

B.a diesel engine

C.a compressor

D.oil

相似考题

1.In an AC.synchronous motor electric propulsion plant,propeller speed is controlled by()A.prime mover speedB.number of energized main motor polesC.propulsion generator field strengthD.electric coupling field strength

2.If a centrifugal pump is driven by a constant speed electric motor and produces a discharge pressure less than designed, the cause is probably ______.A.excessive pump speedB.excessive suction headC.worn wearing ringsD.gross pump misalignment

3.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

4.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 springsB.compressed air pressureC.hydraulic pressureD.exhaust gas pressure

更多“A hydraulic motor may be driven by______.A.an electric motorB.a diesel engineC.a compresso ”相关问题

  • 第1题：

    The refrigeration system low pressure cutout switch is actuated by______.

    A.an electric system manager

    B.a sensing bulb at the tail coil of the evaporator

    C.pressure changes in the suction line

    D.failure of the king solenoid valve


    正确答案：C

  • 第2题：

    These hatch covers are usually driven by electric or hydraulic power.（）

    • A、这些舱盖通常是用电力驱动的
    • B、这些舱盖通常是用液压驱动的
    • C、这些舱盖通常是用电力或液压驱动的
    • D、这些舱盖通常是用油压或液压驱动的

    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
    这些舱盖通常是用电力或液压驱动的。（）
    A

    These hatches are usually driven by electric or hydraulic power.

    B

    These hatch covers are usually driven by electric or hydraulic power.

    C

    These hatch covers are usually driven by electric.

    D

    These hatch covers are usually driven by hydraulic power.


    正确答案： A
    解析： 暂无解析

  • 第5题：

    单选题
    When hoisting a boat on gravity type davits using an electric motor driven winch，the davit arms should be brought up（）.
    A

    to their final position with the winch operating at slow speed

    B

    to the bar stop，and then hand cranked to their final position

    C

    until just before they make contact with the limit switch，and then hand cranked to their final position

    D

    to the embarkation deck，and then hand cranked to their final position


    正确答案： C
    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
    Any electric motor can be constructed to be（）.
    A

    short proof

    B

    ground proof

    C

    explosion proof

    D

    overload proof


    正确答案： D
    解析： 暂无解析

  • 第8题：

    单选题
    If a centrifugal pump is driven by a constant speed electric motor and produces a discharge pressure less than designed, the cause is probably（）.
    A

    excessive pump speed

    B

    excessive suction head

    C

    worn wearing rings

    D

    gross pump misalignment


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    For occasional heavy loads, two cranes can be arranged to work together. The operating （） for deck crane motors may be hydraulic electric.
    A

    principle

    B

    medium

    C

    instruction

    D

    voltage


    正确答案： D
    解析： 暂无解析

  • 第10题：

    单选题
    The rotor of the hydraulic motor rotates at a speed proportional to the （）.
    A

    flow of oil

    B

    pressure of oil

    C

    A and B

    D

    temperature of oil


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    What type of electric motor is most commonly used on board ship?（）
    A

    non-synchronous electric motor

    B

    synchronous electric motor

    C

    fully enclosed electric motor

    D

    watertight electric motor


    正确答案： C
    解析： 暂无解析

  • 第12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

  • 第13题：

    这些舱盖通常是用电力或液压驱动的。（）

    • A、These hatches are usually driven by electric or hydraulic power.
    • B、These hatch covers are usually driven by electric or hydraulic power.
    • C、These hatch covers are usually driven by electric.
    • D、These hatch covers are usually driven by hydraulic power.

    正确答案:B

  • 第14题：

    单选题
    When the desired rudder angle is attained by a typical double mm electro-hydraulic steering gear,the（）.
    A

    ram relief valves bypass oil to stop rudder movement

    B

    six-way valve shifts to the neutral flow position

    C

    steering pump electric motor is de - energized by the transfer switch

    D

    follow-up gear takes the hydraulic pump off stroke


    正确答案： D
    解析： 暂无解析

  • 第15题：

    单选题
    If an electric motor driven air compressor fails to start, it may be due to a （）.
    A

    leaking discharge valve

    B

    jammed suction valve

    C

    tripped overload relay

    D

    broken discharge un-loader


    正确答案： D
    解析： 暂无解析

  • 第16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17题：

    单选题
    操作完后，关掉电动机。（）
    A

    After operation, start the electric motor.

    B

    Before operation, stop the electric motor.

    C

    Before operation, start the electric motor.

    D

    After operation, stop the electric motor.


    正确答案： D
    解析： 暂无解析

  • 第18题：

    单选题
    If the electric motor driving an air compressor fails to start, the cause may be a （）.
    A

    leaking unloader

    B

    tripped circuit breaker

    C

    control line leak

    D

    defective pop valve


    正确答案： B
    解析： 暂无解析

  • 第19题：

    单选题
    “A centrifuge consists of an electric motor driving a vertical shaft on the top of which is mounted the bowl assembly”.According to this sentence, we can know that is mounted on the top of the vertical shaft（）
    A

    a centrifuge

    B

    an electric motor

    C

    a bowl assembly

    D

    a driving motor


    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
    If a hydraulic pump on a winch accidentally stops while hoisting，the load will stay suspended because（）.
    A

    a check valve will close that prevents reverse circulation

    B

    a centrifugal counterweight counteracts the force of gravity

    C

    the electric pump motor will cut out

    D

    the control lever will move to the stop position


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    The most common forms of main drive used on deck auxiliaries are （）.
    A

    steam plants, electric motors and compressed air

    B

    diesel engine, hydraulic machinery and compressed air

    C

    steam plants, electric motors and hydraulic machinery

    D

    diesel engines, steam plants and hydraulic machinery


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    The hand steering is a method by which the motion of the rudder is controlled with （）.
    A

    a motor-driven steering wheel

    B

    a pneumatic steering wheel

    C

    a hand-driven steering wheel

    D

    an electric steering wheel


    正确答案： C
    解析： 暂无解析

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