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In each cylinder cover is a large central opening for mounti

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  • 【名词&注释】

    螺旋桨(propeller)

  • [单选题]In each cylinder cover is a large central opening for mounting ()

  • A. the indicating cock
    B. the starting valve
    C. air inlet valve
    D. the exhaust valve

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  • 学习资料:
  • [单选题]字头销外圆表面的过度磨损常采用()工艺修复。
  • A. 镀镍
    B. 镀铁
    C. 镀铬
    D. 镀锌

  • [单选题]轴系校中计算中的热态是指()。
  • A. 计及轴承温度的影响
    B. 计及活塞运动部件的动态负荷变化的影响
    C. 计及轴系振动的影响
    D. 计及螺旋桨的附连水质量

  • [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

  • [单选题]The lowest ring of a piston is ().
  • A. a coil spring
    B. a sealing ring
    C. an oil distributor ring
    D. main seal ring

  • [单选题]For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because ().
  • A. it has a longer power stroke
    B. more air gets into the cylinder each stroke
    C. it develops twice as many power strokes at the same speed
    D. higher combustion pressure is developed

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