气缸套内圆表面采用（）加工，是防止拉缸事故的工艺措施之一。Ⅰ.

【名词&注释】

柴油机曲轴(diesel engine crankshaft)、气缸套(cylinder liner)

[单选题]气缸套内圆表面采用（）加工，是防止拉缸事故的工艺措施之一。Ⅰ.珩磨；Ⅱ.振动；Ⅲ.机械；Ⅳ.波纹；Ⅴ.磨削。

A. Ⅰ＋Ⅱ＋Ⅳ
B. Ⅰ＋Ⅳ
C. Ⅱ＋Ⅳ
D. Ⅰ＋Ⅱ

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学习资料：

[单选题]航行中，柴油机曲轴发生断裂事故，条件许可时可采用（）应急措施进行修理。Ⅰ.金属扣合工艺；Ⅱ.焊接；Ⅲ.局部更新；Ⅳ.铆接；Ⅴ.粘接。

A. Ⅱ
B. Ⅱ＋Ⅳ
C. Ⅲ＋Ⅳ
D. Ⅰ＋Ⅴ

[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]Friction, engine wear and oil consumption in a diesel engine are directly related to the （）.

A. acidity of the oil
B. pour point of the oil
C. flash point of the oil
D. viscosity of the oil

[单选题]Passages are drilled in the crankshafts of diesel engines to provide lubricating oil to the （）.

A. main bearings
B. connecting rod bearings
C. piston pin bushings
D. All of the above

[单选题]On a twin-screw，twin-rudder vessel，the most effective way to turn in your own water，with no way on，is to put（）.

A. one engine ahead and one engine astern，with full rudder
B. one engine ahead and one engine astern，with rudders amidships
C. both engines ahead，with full rudder
D. both engines astern，with full rudder

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