新制艉轴铜套的厚度应为（）。

【名词&注释】

机械设备(mechanical equipment)、水压试验(hydrostatic test)、冷却系统(cooling system)、密封性(sealing)、机动性(mobility)、生命力强、装卸货物(cargo handling)

[单选题]新制艉轴铜套的厚度应为（）。

A. 0.02d＋5mm
B. 0.015d＋3.5mm
C. 0.03d＋7.5mm
D. 0.01d＋2mm

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学习资料：

[单选题]甲板机械是为保证（）的机械设备。

A. 船舶航行、停泊
B. 装卸货物^{(cargo handling)}及起落重物
C. 船舶稳性
D. A+B

[单选题]双轴系具有（）的特点。Ⅰ.高速；Ⅱ.便于操纵；Ⅲ.机动性好；Ⅳ.传动损失小；Ⅴ.生命力强。

A. Ⅱ＋Ⅲ
B. Ⅰ＋Ⅲ
C. Ⅰ＋Ⅲ＋Ⅴ
D. Ⅰ＋Ⅲ＋Ⅳ

[单选题]检查油润滑艉轴承密封装置防蚀衬套的密封性采用（）方法。

A. 油压试验
B. 水压试验
C. 磨合试验
D. 运转试验

[单选题]暖机主要工作是（）。Ⅰ.冷却系统预热；Ⅱ.润滑系统预热；Ⅲ.燃油系统预热；Ⅳ.启动空气预热

A. Ⅰ+Ⅱ+Ⅲ
B. Ⅰ+Ⅱ+Ⅳ
C. Ⅰ+Ⅲ+Ⅳ
D. Ⅱ+Ⅲ+Ⅳ

[单选题]Once all cylinders are firing regularly, （） is shut off.

A. the exhaust valve
B. the starting air
C. the inlet valve
D. the fuel oil

[单选题]Which of the following is a factor of fuel oil almost having nothing to do with the formation of combustion products?（）

A. setting point
B. ash
C. sulfur content
D. carbon residue

[单选题]General, the best way for replacement of lamp is （）.

A. after the point is reached at which the failures begin to increase rapidly
B. before the point is reached at which the failures begin to increase rapidly
C. before the point is reached at which the failures begin to increase slowly
D. after the point is reached at which the failures begin to increase slowly

[单选题]The PRIMARY function of a waste heat boiler is to （）

A. reduce engine exhaust noise
B. reduce engine back pressure
C. recover heat which otherwise would be lost
D. increase turbocharger efficiency

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