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在高增压柴油机上,排气阀阀盘的温度可达()℃。

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  • 【名词&注释】

    动力装置(power plant)、排气阀(exhaust valve)、圆柱形(cylindrical)、大幅度(greatly)、光学仪器法、理论中心线(theoretical centerline)、圆锥形(conical)

  • [单选题]在高增压柴油机上,排气阀阀盘的温度可达()℃。

  • A. A.650~800
    B. B.450~600
    C. C.500~650
    D. D.450~500

  • 查看答案&解析 查看所有试题
  • 学习资料:
  • [单选题]采用贮备可以提高动力装置的可靠性,但是亦有可能使可靠性反而下降,这是因为()。Ⅰ.散热面积小,使温度大幅度上升;Ⅱ.振动、冲击因素影响备件寿命
  • A. 仅Ⅰ对
    B. 仅Ⅱ对
    C. Ⅰ,Ⅱ都对
    D. Ⅰ,Ⅱ都不对

  • [单选题]废气锅炉窄点越(),排气的压力损失较(),废气流速必须()。
  • A. 小/小/提高
    B. 小/大/降低
    C. 大/小/降低
    D. 大/大/降低

  • [单选题]确定轴系理论中心线(theoretical centerline)的方法有()。Ⅰ.拉线法;Ⅱ.平轴法;Ⅲ.指针法;Ⅳ.直尺-塞尺法;Ⅴ.光学仪器法。
  • A. Ⅱ+Ⅲ
    B. Ⅰ+Ⅴ
    C. Ⅰ+Ⅱ+Ⅳ
    D. Ⅰ+Ⅱ+Ⅲ+Ⅳ

  • [单选题]大、中型船舶的轴系各中间轴连接法兰广泛采用()螺栓连接。
  • A. 圆柱形
    B. 圆锥形(conical)
    C. 50%以上圆柱形
    D. 50%以上圆锥形(conical)

  • [单选题]The hydraulic () is used to control engine speed.
  • A. motor
    B. pump
    C. governor
    D. capsta

  • [单选题]When we say that two objects have relative motion, we mean ().
  • A. the distance between them remains the same
    B. the distance between them is changing
    C. the position between them is not changing
    D. their positions to the earth remain the same

  • [单选题]If you don’t understand the meaning of the technical terms of the diesel engine, you can () the dictionary of machine technology.
  • A. look for
    B. find out
    C. consult
    D. read

  • [单选题]Maximum horsepower of a diesel engine is attained ().
  • A. when the engine RPM is pulled down by overload
    B. at rated engine RPM
    C. at 95 % of rated engine RPM
    D. at 95 % of a properly adjusted governor RPM with the engine under full load

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