船轴磨损后应检测其（）。

【名词&注释】

柴油机(diesel engine)、可回收的(retunable)

[单选题]船轴磨损后应检测其（）。

A. 圆度误差
B. 圆柱度误差
C. 工作轴颈
D. 轴颈

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学习资料：

[单选题]使废气锅炉排气进口温度t1（），可回收的排气余热就越（）。

A. 提得越高/多
B. 提得越高/少
C. 降得越低/多
D. 降得越低/少

[单选题]废气涡轮增压器使柴油机的功率增加（）倍。

A. 0.5
B. 1
C. 1.5
D. 2

[单选题]The quality of the fuel oil and lube oil （）, Im afraid.

A. has much to do with the operation of the engine and its life
B. have much to do with the operation of the engine and its life
C. has much doing with the operation of the engine and its life
D. have much doing with the operation of the engine and its life

[单选题]Prior to lighting off a cold automatically fired auxiliary boiler, you should （）.

A. check and regulate the water level
B. close the air cock once fires are lit
C. blowdown the gage glass
D. crack the steam stop to assure protective steam flow

[单选题]In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the （）.

A. metal particles loosened by wear
B. air when no air cleaners are used
C. condensation of water vapors
D. breakdown of the lubricating oil by dilutio

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