[单选题]船舶动力装置往往以推进装置的类型进行分类，可分为（）。

正确答案 ：A

蒸汽动力装置、燃气动力装置、核动力装置

[单选题]排气阀阀杆磨损超过标准要求时，可采用（）工艺修复阀杆。也可以采用喷涂或喷焊工艺修复。

正确答案 ：A

镀铬或镀铁

[单选题]Fuel is delivered into the combustion space by （）.

正确答案 ：D

an injection system

[单选题]Modern engines （） exhaust gas driven turbo-chargers to supply pressurized fresh air for scavenging and supercharging.

正确答案 ：C

make use of

[单选题]The cap and new shell are tightened up and then removed and the thickness of the wire measured by （）.

正确答案 ：B

a micrometer

[单选题]The crank chamber oil （）.

正确答案 ：A

can be recovered

[单选题]Excessive vibration of an automatically fired auxiliary boiler can be caused by （）

正确答案 ：B

combustion pulses

[单选题]A three-way thermostatic control valve regulates the diesel engine cooling water temperature by passing a portion of the water （）.

正确答案 ：C

to the expansion tank

[单选题]What is the crank angle between any two crank throws in the firing order of a four-stroke/cycle, in line, eight cylinder diesel engine?（）

正确答案 ：C

90

[单选题]Proper atomization of fuel in diesel engine combustion chambers will （）.

正确答案 ：B

improve combustion

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