上舵承发生（）时应换新。

【名词&注释】

使用情况(service condition)、固定式(fixed)

[单选题]上舵承发生（）时应换新。

A. 磨损
B. 穴蚀
C. 护圈或滚子破碎
D. 变形

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学习资料：

[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

A. Ⅰ十Ⅱ
B. Ⅰ+Ⅲ
C. Ⅱ+Ⅲ
D. Ⅰ+Ⅱ+Ⅲ

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

A. decrease
B. increase
C. be dismantled
D. be reassembled

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

A. water discharges from the indicator cocks
B. no water is leaking into crankcase
C. no water in the scavenge belt
D. the rpm is lower than the speed of Dead Slow Ahead

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

A. crankshaft
B. camshaft
C. piston rod
D. rack and pinio

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

A. area times the stroke
B. area times the stroke, times the number of cylinders
C. volume times the stroke
D. volume times the stroke, times the number of cylinder

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

A. Less fuel consumption per SHP
B. Diesel fuel costs less than bunker C or its equivalent
C. Less routine maintenance required
D. Less weight per SHP

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