对传动轴系理解正确的是（）。Ⅰ.长轴系刚性好，对偏差敏感；Ⅱ.短

【名词&注释】

动力装置(power plant)

[单选题]对传动轴系理解正确的是（）。Ⅰ.长轴系刚性好，对偏差敏感；Ⅱ.短轴系挠性好对偏差不敏感

A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ+Ⅱ
D. Ⅰ，Ⅱ都不对

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学习资料：

[单选题]动力装置长期在部分负荷下工作，废热锅炉排烟温度t2过低，对废热利用设备的维护管理是（）。

A. 有利的
B. 合理的
C. 必须的
D. 不利的

[单选题]由于铁梨木需进口，价格较高，故采用（）作为铁梨木的代用材料。

A. 尼龙
B. 桦木层压胶木
C. 橡胶
D. 赛龙

[单选题]Among the rings of a piston the （） one is subjected to the greatest load and temperature.

A. bottom
B. middle
C. top
D. none of the above

[单选题]Lubricating oil for an engine is stored at the bottom of the （）, known as the sump or in a drain tank located beneath the engine.

A. sea cheat
B. air receiver
C. crankcase
D. water box

[单选题]To avoid scavenge fires occurring the engine timing and equipment maintenance （）.

A. should be correctly carried out
B. should correctly be taken place
C. should carded with care
D. must to carry out with great care

[单选题]On most diesel engines, the governor controls the output speed by （）.

A. controlling the amount of fuel injected into the cylinders
B. varying the speed of the turbocharger
C. adjusting the compression ratio
D. changing the timing of the fuel injection camshaft

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