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铁梨木尾轴后轴承的长度不应()。

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  • 【名词&注释】

    可靠性(reliability)、环境温度(ambient temperature)、直线度误差(straightness error)

  • [单选题]铁梨木尾轴后轴承的长度不应()。

  • A. 小于尾轴轴颈的2,5倍
    B. 大于尾轴轴颈的2.5倍
    C. 小于尾轴轴颈的4倍
    D. 大于尾轴轴颈的4倍

  • 查看答案&解析 查看所有试题
  • 学习资料:
  • [单选题]可靠性定义中所述及的“规定的条件”,包括()。Ⅰ.环境温度、压力、湿度;Ⅱ.振动;Ⅲ.承受的负荷
  • A. Ⅰ+Ⅱ
    B. Ⅱ+Ⅲ
    C. Ⅰ+Ⅲ
    D. Ⅰ+Ⅱ+Ⅲ

  • [单选题]涡轮壳体局部腐蚀较重,可采用()修理。
  • A. 有机粘接
    B. 焊补
    C. 局部更换
    D. 更换壳体

  • [单选题]如果两根中间轴连接法兰的位置处于两轴承间距的中间,则轴系会出现()。Ⅰ.轴系挠度过大;Ⅱ.轴系难以准确对中;Ⅲ.安装不方便
  • A. Ⅰ+Ⅱ
    B. Ⅱ+Ⅲ
    C. Ⅱ+Ⅲ
    D. Ⅰ+Ⅱ+Ⅲ

  • [单选题]舵杆弯曲变形时直线度误差>2mm/m,允许采用()修复。
  • A. 冷校直
    B. 热校直
    C. 加热-机械校直
    D. 机械校直

  • [单选题]Fuel is not supplied to the corresponding cylinders due to ().
  • A. a failure of the motor
    B. a failure of lubricator
    C. a failure of cylinder
    D. a failure of fuel pum

  • [单选题]The correct tightening is obtained by use of () to measure the extension given to the bolts.
  • A. pressure gauges
    B. stretch gauges
    C. thermometers
    D. bridge gauge

  • [单选题]Since the engine doesn’t work well, you’d better () as soon as possible.
  • A. reduce its speed
    B. find out its trouble
    C. eliminate its trouble
    D. all the above

  • [单选题]A VLCC (100,000 DWT+) with a 30,000 Shaft Horsepower Steam Turbine is slow to respond to engine movements and has less stopping power than normal ships because it has a().
  • A. bigger propeller
    B. smaller power weight ratio
    C. smaller propeller
    D. larger power weight ratio

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