【名词&注释】
增压器(turbocharger)、集装箱船(container ship)、动平衡试验(dynamic balance test)
[单选题]传动轴系横向振动的临界转速随轴承跨距(),易使其临界转速进入主机的工作转速范围内。Ⅰ.增大而增加;Ⅱ.增大而降低
A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ+Ⅱ
D. Ⅰ,Ⅱ都不对
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学习资料:
[单选题]消除增压器振动的方法首先应是()。
A. 换新轴承
B. 动平衡试验
C. 更换叶片
D. 校中测量
[单选题]一般()采用双轴系的推进系统。Ⅰ.油船;Ⅱ.拖船;Ⅲ.客船;Ⅳ.军舰;Ⅴ.集装箱船。
A. Ⅱ+Ⅲ
B. Ⅰ+Ⅱ
C. Ⅰ+Ⅱ+Ⅲ
D. Ⅲ+Ⅳ
[单选题]艉轴铜套产生()时,应采用换新铜套。Ⅰ.磨损;Ⅱ.腐蚀;Ⅲ.壁厚过薄;Ⅳ.套合松动;Ⅴ.接缝渗水。
A. Ⅱ+Ⅲ
B. Ⅰ+Ⅱ+Ⅳ
C. Ⅲ+Ⅳ+Ⅴ
D. Ⅰ+Ⅲ+Ⅳ
[单选题]() is the removal of exhaust gases by blowing in fresh air.
A. Gas exchange
B. Charging
C. Scavenging
D. Supercharging
[单选题]During the inspection, the starting air valves should be closed () the engine from turning.
A. to increase
B. to speed up
C. to prevent
D. to reduce
[单选题]Fuel pump index is ().
A. the viscosity index
B. the fuel oil contents
C. the starting speed
D. the reading at the rack
[单选题]Which of the following can be directly obtained by means of an indicator card?()
A. power
B. maximum pressure in a cylinder
C. mean pressure in a cylinder
D. all of the above
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