船舶动力装置题库2022终极模考试题279

1. [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^{(directly affect)}其他指标的优劣

A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ，Ⅱ都对
D. Ⅰ，Ⅱ都不对

2. [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（）。

A. 时间的累计
B. 转数的累计
C. 距离的累计
D. 次数的累计

3. [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。

A. A．Ⅰ＋Ⅲ＋Ⅳ
B. B．Ⅲ＋Ⅳ
C. C．Ⅲ＋Ⅳ＋Ⅴ
D. D．Ⅰ＋Ⅴ

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

A. throw
B. crankshaft
C. crankpin
D. crosshead

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

A. inefficiency
B. oiliness
C. detergency
D. purity

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

A. bending stresses弯曲应力
B. torsion stresses扭转应力
C. shear stresses剪应力
D. All of the above

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

A. the period of time during which no trouble occurs to the engine
B. no trouble will occur to the engine all its life
C. trouble may occur freely to the engine
D. no matter what you do to the engine, no trouble will occur during this period

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

A. Splash lubrication
B. Pressure lubrication
C. Sight feed lubricators
D. Mechanical lubricator

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

A. cold corrosion of the nozzles
B. fuel viscosity for better atomization
C. carbon accumulation on the nozzles
D. fuel detonation in the cylinder

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