正确答案: C

支承艉轴和螺旋桨

题目：艉轴管装置是用以（）、密封船体不使海水进入艉轴承和防止润滑油溢出的设备。

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学习资料的答案和解析：

[单选题]吊缸过程中，在活塞组件吊出之前应先进行（）工作。

清除磨台

[单选题]Doors are generally formed in the （） of the both in-line and Vee engines to give maintenance access to the crankshaft main and connecting rod large end bearing.

columns

[单选题]The cap and new shell are tightened up and then removed and the thickness of the wire measured by （）.

a micrometer

[单选题]The main factor which determines the output of each cylinder is （）

the cylinder bore

[单选题]The selection of an oil from the （） depends to a great extent on the operating conditions, the design of the engine and the type of fuel to be burned.

commercially available

[单选题]To prevent the build up of high stresses engine must not be run continuously （）.

at critical speed

[单选题]When a crankshaft （） outside the engine, it should be carefully supported in a manner which will avoid imposing high bending moments on it.

has to be handled

[单选题]After a normal, or safety shutdown, automatic combustion control systems for an auxiliary boiler are designed to prevent the immediate refiring of a burner in order for the （）.

furnace to be re-purged