正确答案: A

well ventilated

题目：Keep compartment （） as the gas given off can be dangerous.

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学习资料的答案和解析：

[单选题]底脚螺栓与机座和底座的连接方式是（）连接。

刚性

[单选题]船舶舵系是实现船舶（）等操纵的航向控制装置。Ⅰ.转向；Ⅱ.前进；Ⅲ.后退；Ⅳ.掉头；Ⅴ.直航。

Ⅰ＋Ⅳ＋Ⅴ

[单选题]滑油系统的备车准备工作应检查（）。Ⅰ.循环油柜油位；Ⅱ.轴承油位；Ⅲ.储油柜油位；Ⅳ.分油机

Ⅰ+Ⅱ

[单选题]During the inspection, the starting air valves should be closed （） the engine from turning.

to prevent

[单选题]In a four-stroke engine the camshaft rotates at （）.

half the engine speed

[单选题]The needle valve in a fuel valve will （） when the fuel pressure action on the needle valve tapered face exerts a force lower than that of the spring compression.

be seated

[单选题]What preventative maintenance should be done frequently to diesel engine starting air receivers?（）

Drain the accumulated moisture

[单选题]Which of the following problems can cause fluctuating pressures in the closed cooling system of a main propulsion diesel engine?（）

Cavitation in the cooling water pump