Fresh water is used for the cooling of cylinder jackets and

【名词&注释】

螺旋桨(propeller)、液压油(hydraulic oil)、转子动平衡(rotor balancing)、增压器转子(blower rotor)

[单选题]Fresh water is used for the cooling of cylinder jackets and （） of the marine diesel engine.

A. cylinder covers
B. lubricating space
C. crosshead
D. exhaust manifold

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学习资料：

[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（）。

A. 通入液压油时，用来松紧缸盖螺帽
B. 液压装置失效时，用来松开缸盖螺帽
C. 液压装置失效时，用来上紧缸盖螺帽
D. 通入液压油时，用来松紧缸盖螺帽和液压装置失效时，用来上紧缸盖螺帽

[单选题]增压器转子^{(blower rotor)}动平衡检验后，要求达到（）。

A. e≤[e]
B. e≥[e]?
C. FR≤[FR]
D. FR≥[FR]

[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。

A. Ⅰ＋Ⅲ
B. Ⅰ＋Ⅱ＋Ⅳ＋Ⅴ
C. Ⅲ＋Ⅳ＋Ⅴ
D. Ⅰ＋Ⅱ＋Ⅲ＋Ⅳ

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

A. soda solution
B. mechanical impurities
C. ballast
D. water and residual

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

A. Diesel engines have more advantages in comparison with gasoline engines
B. Diesel engines have more advantages in comparison to gasoline engines
C. Gasoline engines have more advantages in comparison with diesel engines
D. Gasoline engines have more advantages in comparison to diesel engine

[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.

A. brought about
B. caused for
C. resulted from
D. led

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