正确答案: C

护圈或滚子破碎

题目：上舵承发生（）时应换新。

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学习资料的答案和解析：

[单选题]并联连接系统按照部件的连接情况可分为备用部件和基本部件，根据使用情况有（）。Ⅰ.固定式连接热态（在负荷下）各用方式；Ⅱ.固定式连接冷态（在无负荷下）各用方式；Ⅲ.不固定式（流动式）连接各用方式

Ⅰ+Ⅱ+Ⅲ

[单选题]If there is water in fuel oil, the revolution of the engine will （）.

decrease

[单选题]It is abnormal that when the engine is being turned by the turning gear or by hand, （）.

water discharges from the indicator cocks

[单选题]The plunger in the fuel injector pump, usually operated by a （）, is driven up and down when working.

rack and pinio

[单选题]Engine displacement is equal to the cylinder （）.

area times the stroke, times the number of cylinders

[单选题]What is an advantage of diesel over steam turbine propulsion? （）

Less fuel consumption per SHP