[单选题]可靠性在船舶动力装置质量指标中占有特殊的地位，因为它是（）。Ⅰ.落实其他质量指标的前提；Ⅱ.直接影响其他指标的优劣

正确答案 ：C

Ⅰ，Ⅱ都对

[单选题]在可靠性的定义中所叙述的“规定的时间”，理解错误的是（）。

正确答案 ：B

转数的累计

[单选题]导致曲轴轴线产生塌腰形变形，臂距差朝正值增大方向变化的因素有（）。Ⅰ.爆发压力；Ⅱ.飞轮重量；Ⅲ.曲轴自重；Ⅳ.活塞装置重量；Ⅴ.轴系轴线低于曲轴轴线，两法兰呈上开口。

正确答案 ：A

A．Ⅰ＋Ⅲ＋Ⅳ

[单选题]Each crank is made up of two crank webs joined by a common（） to which the bottom endbearing is fitted.

正确答案 ：C

crankpin

[单选题]In large marine diesel engines cylinder oils usually contain additives formulated to impart the （） to clean the rings and grooves.

正确答案 ：C

detergency

[单选题]The crankshaft receives and transmits the full working power of the engine and is subjected to fluctuating （）.

正确答案 ：D

All of the above

[单选题]The trouble-free life of an engine indicates （）.

正确答案 ：A

the period of time during which no trouble occurs to the engine

[单选题]Which of the following methods is normally used to lubricate bearings in a small high-speed diesel engine?（）

正确答案 ：B

Pressure lubrication

[单选题]Fuel injectors used in heavy fuel oil systems are usually provided with cooling to reduce（）.

正确答案 ：C

carbon accumulation on the nozzles

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