正确答案: A

1/3

题目：针阀与针阀体进行滑动试验时，一般将针阀抽出（）配合面长度。

查看原题 查看所有试题

学习资料的答案和解析：

[单选题]为了提高船舶动力装置的经济性，（）部门应对整个动力装置进行综合分析。

A+B+C

[单选题]船上吊缸检修一般不必进行（）。

气缸余隙测量

[单选题]底脚螺栓的作用是将（）牢牢地固定在一起。Ⅰ.柴油机机座；Ⅱ.船体双层底底座；Ⅲ.固定垫块；Ⅳ.活动垫块。

Ⅰ＋Ⅱ＋Ⅲ＋Ⅳ

[单选题]（） fuel oils （） lubricating oils require treatment before passing to the engine.

Both；and

[单选题]Such an engine frame helps （） the engine and so protect the bearings from the deformation forces transmitted via the ships double bottom.

to stiffen

[单选题]The two-stroke cycle begins with the piston coming up from the bottom of its stroke, with scavenge ports in the sides of the cylinder being （）.

opened

[单选题]The way to reduce （） is to build up a film of lubricant between any two surfaces that rub against each other.

friction

[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]Cross scavenging requires the fitting of （） to prevent air or exhaust gas escape when the piston is at the top of the stroke.

a piston skirt