正确答案: B
仅Ⅱ对
题目: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
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学习资料的答案和解析:
[单选题]消除增压器振动的方法首先应是()。
换新轴承
[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。
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。
Ⅲ+Ⅳ+Ⅴ
[单选题]() is the removal of exhaust gases by blowing in fresh air.
Scavenging
[单选题]During the inspection, the starting air valves should be closed () the engine from turning.
to prevent
[单选题]Fuel pump index is ().
the reading at the rack
[单选题]Which of the following can be directly obtained by means of an indicator card?()
maximum pressure in a cylinder