正确答案: B

Ⅰ＋Ⅱ＋Ⅴ

题目：柴油机运转中，轮机员可根据气缸或活塞冷却水的（）直接迅速判断零件上有无穿透性裂纹。Ⅰ.压力变化；Ⅱ.压力表指针波动；Ⅲ.水温变化；Ⅳ.流量变化；Ⅴ.膨胀水柜水位波动。

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学习资料的答案和解析：

[单选题]中国船级社允许船舶曲轴臂距差的最大极限是（）mm（S为冲程，单位：mm）。

＜0.30S

[单选题]目前钢质海船建造时安装的轴系广泛采用（）。

合理校中

[单选题]桨叶上同一半径截面上的（）螺距的算术平均值称为该截面的截面螺距。

局部

[单选题]An overspeed safety device is usually fitted to a generator engine for （） in the event of overspeed.

cutting power off the engine

[单选题]If the engine does start on air, but combustion does not immediately begin, the cause may be （）.

the turning gear still engaged

[单选题]The cylinders, with cooling jackets, are （） to the engine frame by eight tie rods.

fastened

[单选题]The most important factor that causes the wear of the engine parts is （）.

friction

[单选题]Which of the following statements describes the function of an expansion tank in a diesel engine cooling system?（）

All of the above