当气缸内径增量超标时，应选用（）进行修理。Ⅰ.镀铬；Ⅱ.镀铁；Ⅲ.

【名词&注释】

可靠性(reliability)、螺旋桨(propeller)、船舶动力装置(marine power plant)、重要组成部分(important part)、满足要求(meet demand)、中央冷却系统(central cooling system)

[单选题]当气缸内径增量超标时，应选用（）进行修理。Ⅰ.镀铬；Ⅱ.镀铁；Ⅲ.镗缸；Ⅳ.修理尺寸法；Ⅴ.恢复尺寸法。

A. Ⅰ＋Ⅲ＋Ⅳ＋Ⅴ
B. Ⅰ＋Ⅱ＋Ⅴ
C. Ⅳ＋Ⅴ
D. Ⅰ＋Ⅱ＋Ⅲ

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学习资料：

[单选题]假设某一中央冷却系统^{(central cooling system)}中设有三台循环水泵，若在热带水域必须同时运行才能满足要求^{(meet demand)}，从可靠性考虑这三台水泵之间是（）。Ⅰ.并联关系；Ⅱ.串联关系

A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ，Ⅱ都对
D. Ⅰ，Ⅱ都不对

[单选题]船舶轴系是船舶动力装置的重要组成部分，承担着（）的作用，以实现船舶航行。

A. 传递运动
B. 传递扭矩和推力
C. 摩擦力矩
D. 连接螺旋桨

[单选题]Excessive clearances in the main or crank-pin bearings will sometimes be indicated by （） before any bearing knock is heard.

A. loss of flow in the fuel system
B. loss of pressure in the air system
C. loss of flow in the lubricating system
D. loss of pressure in the lubricating system

[单选题]The fuel oil system for a diesel engine can be considered in two parts--the fuel supply and the （） systems.

A. fuel treatment
B. fuel combustion
C. fuel injection
D. fuel separating

[单选题]Fusible plugs are installed in fire-tube boilers to （）.

A. provide a means of draining the boiler
B. warn the engineer of low water level
C. cool the crown sheet at high firing rates
D. open the burners electrical firing circuit

[单选题]Diesel engine jacket water is used in the distillation process as the （）.

A. coolant for the distillate
B. coolant for the brine cooler
C. means of heating the feedwater
D. primary means of producing a vacuum within the distiller

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