正确答案: B

液压装置失效时，用来松开缸盖螺帽

题目：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（）。

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学习资料的答案和解析：

[单选题]早期故障是在使用开始后，因为（）而产生的故障。Ⅰ.设计与制造缺陷；Ⅱ.磨合不当；Ⅲ.维修不当

Ⅰ+Ⅱ

[单选题]High-speed rotating in a centrifugal purifier can produce a force （） larger than the force of gravity.

many thousand times

[单选题]Pistons of marine medium speed diesel engines may be made of （） in order to keep the weight down for balancing purpose at high speed.

aluminum alloy

[单选题]The quantity of oil injected into the cylinder can be regulated （）.

by turning the pump plunger

[单选题]Which of the following conditions can cause above normal air temperature to develop in the intake manifold of a four-stroke/cycle turbo-charged diesel engine?（）

A defective after-cooler

[单选题]A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST （）.

reduce the engine load

[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（）.

one engine ahead and one engine astern，with full rudder

[单选题]The engine in a covered lifeboat is fueled with（）.

diesel oil