正确答案: C

C．降低转速

题目：航行中一旦发现增压器振动，则首先应该（）。

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学习资料的答案和解析：

[单选题]主机主轴承磨损后，（）性能参数发生变化。Ⅰ.臂距差；Ⅱ.桥规值；Ⅲ.轴承间隙；Ⅳ.曲轴轴线状态；Ⅴ.主轴颈下沉量。

Ⅰ＋Ⅱ＋Ⅲ＋Ⅳ＋Ⅴ

[单选题]检测轴系中心线状态发现δ总和φ总均严重超差，应采取（）的措施进行调整。

同时调整艉轴和主机的位置

[单选题]All the rings are slightly rounded on their external top and bottom edges to keep the oil film on the cylinder liner during （） for new piston rings.

the running-in period

[单选题]Each cylinder is closed at the top by a （）, made of a special heat-resistant steel.

cylinder cover

[单选题]Which of the following may lead to the engine NOT to start on air?（）

three of the six starting valves stuck

[单选题]For Vee-form engines, （） is shaped to given two slopping surface on which （） are placed at the correct relative angle to each other.

the top of the column；the cylinder blocks