正确答案: A

cylinder covers

题目：Fresh water is used for the cooling of cylinder jackets and （） of the marine diesel engine.

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学习资料的答案和解析：

[单选题]某些新型大型低速柴油机的气缸盖上，设有用来拆卸缸盖螺帽的液压装置（液压环）和配备了专用环形六角扳手，该扳手的作用是（）。

液压装置失效时，用来松开缸盖螺帽

[单选题]增压器转子动平衡检验后，要求达到（）。

e≤[e]

[单选题]为了检验螺旋桨的螺距，测量时应测出（）。Ⅰ.螺旋桨的半径；Ⅱ.桨叶厚度；Ⅲ.各半径截面局部螺距；Ⅳ.各桨叶平均螺距；Ⅴ.螺旋桨总螺距。

Ⅰ＋Ⅲ

[单选题]Before being used the fuel service tank should be drained of （）.

water and residual

[单选题]（）, so they are widely used on board ship nowadays.

Diesel engines have more advantages in comparison with gasoline engines

[单选题]Impurities in the fuel oil will affect the operation of the engine, which has （） the use of separator and some other devices.

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