正确答案: B

主轴承

题目：吊缸检查中，不需要检查的零件是（）。

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学习资料的答案和解析：

[单选题]液压拉伸器的液压系统中的液压油绝对不可使用（）。Ⅰ.液压油；Ⅱ.系统润滑油；Ⅲ.高级润滑油；Ⅳ.气缸油；Ⅴ.透平油。

Ⅱ＋Ⅳ

[单选题]经修理的涡轮壳体要经过（）的水压试验，合格后方可使用。

1.5倍工作压力

[单选题]Fuel oil is thought to be one of the main factors （） the operation and maintenance of an engine.

having much to do with

[单选题]“Stand by engine” means （）.

make an engine ready for starting

[单选题]The pressure of pilot air is usually （） than that of starting air.

lower

[单选题]Crank web deflection readings will give a positive indication of （）.

worn main bearing journals

[单选题]One method of constructing large marine diesel engines and reducing the total engine frame weight is through （）.

welding plates to form sections for assembly

[单选题]Please supply my vessel（）120 tons of diesel oil.

with