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It is very necessary that each cylinder () before the char

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  • 【名词&注释】

    填料函(stuffing box)、活塞杆填料、测量法(measurement)、弹簧测力计(spring loaded thrust meter)

  • [单选题]It is very necessary that each cylinder () before the charged air is compressed.

  • A. is scavenged
    B. has been scavenged
    C. be scavenged
    D. was scavenged

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  • 学习资料:
  • [单选题]对于活塞杆下端是方形法兰的机型如B&W,如只需解体活塞杆填料函则不需吊出活塞,在曲轴箱内拆掉填料函的()固定螺栓,用专用夹具夹住(),使整个填料函落在夹具的平板上,进行解体。
  • A. 外圈/活塞杆
    B. 内、外圈/活塞杆
    C. 外圈/填料函
    D. 内、外圈/填料函

  • [单选题]实测中间轴承负荷的常用方法是()。
  • A. 弹簧测力计(spring loaded thrust meter)
    B. 顶举法
    C. 电阻应变片测量法
    D. A或B或C

  • [单选题]舵杆工作轴颈与舵叶轴承孔同轴度检验前,先将舵杆与舵叶组装在一起,并使()。
  • A. 舵杆与舵叶法兰结合面贴紧
    B. 法兰连接螺栓中至少有4个紧配螺栓
    C. 舵杆与舵叶法兰结合面贴紧或法兰连接螺栓中至少有4个紧配螺栓
    D. 舵杆与舵叶法兰结合面贴紧和法兰连接螺栓中至少有4个紧配螺栓

  • [单选题]Charging-air pressure increases if there is incorrect combustion and drop in the () of the diesel engine.
  • A. machine efficiency
    B. machinery efficiency
    C. mechanical efficiency
    D. mechanics efficiency

  • [单选题]For an ordinary four-stroke engine the exhaust valves open ().
  • A. after TDC
    B. before TDC
    C. after BDC
    D. before BDC

  • [单选题]Low compression results from ().
  • A. a worn cylinder
    B. broken piston rings
    C. either A or B
    D. none of the above

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