必典考网

如果某海区每年发生大风浪的概率Pw=0.25,某船每年经过该海区航

  • 下载次数:
  • 支持语言:
  • 1541
  • 中文简体
  • 文件类型:
  • 支持平台:
  • pdf文档
  • PC/手机
  • 【名词&注释】

    不可靠度(unreliability)、气缸中心线

  • [单选题]如果某海区每年发生大风浪的概率Pw=0.25,某船每年经过该海区航行的概率Pv=0.1,该船航行不可靠度为F(t)=0.20,则该船在该海域遇险的概率P()为。

  • A. 0.0045
    B. 0.9955
    C. 0.8520
    D. 0.005

  • 查看答案&解析 查看所有试题
  • 学习资料:
  • [单选题]测量发现,活塞在气缸中发生倾斜,即活塞位于近上、下止点位置时,活塞在气缸中分别偏向一侧,活塞与气缸左、右方向上的间隙不等,这是由于()原因造成的。
  • A. A.导板发生上下方向倾斜
    B. B.导板发生左右方向倾斜
    C. C.导板与气缸中心线距离过大或过小
    D. D.滑块与活塞中心线距离过大或过小

  • [单选题]关于臂距值L,不正确的说法是()。
  • A. 根据臂距值可以计算臂距差
    B. 曲柄销在上止点位置的臂距值记为L上
    C. 曲柄销在左平位置的臂距值记为L左
    D. 测量点距曲柄销中心线越近,所测的L值越大

  • [单选题]舵杆纵向裂纹应采用()修理。
  • A. 修刮
    B. 焊补
    C. 粘接
    D. 更换

  • [单选题]Before "stand-by" is rung on the engine telegraph, it is usual to give the main engine () ahead and astern.
  • A. a brief trial with turning gear
    B. a brief trial on power
    C. a long trial by steering gear
    D. one minutes trial with windla

  • [单选题]In a four-stroke engine the camshaft rotates at ().
  • A. half the engine speed
    B. twice the engine speed
    C. the engine speed
    D. four times the engine speed

  • [单选题]Put in the engine turning gear Now examine thoroughly inside the crankcase to () that everything is correct.
  • A. make sure
    B. be sure
    C. assure
    D. believe

  • [单选题]The most important factor that causes the wear of the engine parts is ().
  • A. excessive heat
    B. friction
    C. oxidation
    D. high pressure

  • [单选题]A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST ().
  • A. reduce the engine load
    B. increase the cooling water flow
    C. increase the lube oil pressure
    D. adjust the fuel rack

  • 本文链接:https://www.51bdks.net/show/qggdko.html
  • 推荐阅读

    @2019-2025 必典考网 www.51bdks.net 蜀ICP备2021000628号 川公网安备 51012202001360号