
【名词&注释】
滚动轴承、滑动轴承(sliding bearing)、通风口(ventilation opening)、PGA调速器(pga governor)、有助于(helpful to)、适用于(suitable for)
[单选题]高膨胀泡沫系统一般布置在大型油轮的机舱和油泵间,如果机舱发生火灾,为保证泡沫的灭火效果,负责指挥的船员应该注意( )
A. 一定要切断机舱的燃油供应
B. 一定要完全封闭机舱
C. 一定要在机舱的最高处,留有适当的通风口
查看答案&解析
点击获取本科目所有试题
举一反三:
[单选题]船舶遇险时可使用最先进的报警定位设备是()。
A. 卫星应急示位标
B. 应急发报机
C. 求救烟火信号
[单选题]关于机械轴封的下列说法中错误的是( )。
A. 动密封面磨损后能自动补偿
B. 能适用于(suitable for)使用滚动轴承和滑动轴承的泵
C. 一般不宜用于有悬浮颗粒的液体
D. 动环和静环必须使用不同的材料
[单选题]A crack in a cylinder liner can be caused by
A. worn piston rings
B. installation of undersized sealing rings
C. operating the engine at low loads
D. restricted cooling water passages
[单选题]冰敷有助于(helpful to)______。
A. 制止出血
B. 减轻肿胀
C. 减轻疼痛
D. 以上都对
[单选题]Low compressor head pressure in a refrigeration system can be caused by ___.
A. insufficient condenser cooling water
B. excessive condenser cooling water
C. air in the refrigeration system
D. excessive refrigerant in the system
[单选题]PGA调速器的速度设定可采用( )。
A. 气压设定
B. 液压设定
C. 手动设定
D. A和C
[单选题]If the bowl of a disk type centrifugal purifier when operated as a separator is not primed, the
A. oil has a tendency to emulsify in the bowl
B. purifier will act as a clarifier at the discharge ring
C. oil will be lost through the water discharge ports
D. oil solids will be deposited only at the intermediate top disk
本文链接:https://www.zhukaozhuanjia.com/download/ydq5j6.html