正确答案: A

活塞销

题目：二冲程直流扫气十字头式柴油机吊缸时，不必检查（）。

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学习资料的答案和解析：

[单选题]测量曲轴臂距差时，曲轴旋转一周，可依次测得臂距值为（）。

L上、L右、L下、L左

[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]短轴系是指具有（）或（）中间轴的轴系。

一节/无

[单选题]中间轴常见的失效形式有（）。

A．磨损

[单选题]船轴磨损后应检测其（）。

工作轴颈

[单选题]After the order “（）” is given, the air system is shut down, the turning gear put in.

Finished with Engine

[单选题]Diesel engine main and connecting rod precision bearings are made in halvesEach half exceeds one-half the bearing circumference by a small amountThe small amount is termed （）.

pitch

[单选题]If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, ignition may be delayed because the （）.

cylinder compression pressure may not be high enough

[单选题]Generally speaking，the fuel injected into a marine diesel engine combustion chamber is ignited by（）.

heat of compression