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

【名词&注释】

润滑油(lubricating oil)、螺旋桨(propeller)

[单选题]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。

A. 构成艉轴承
B. 构成轴系
C. 支承艉轴和螺旋桨
D. 支承艉轴衬套

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学习资料：

[单选题]吊缸过程中，在活塞组件吊出之前应先进行（）工作。

A. 清洁
B. 涂饱和气缸油
C. 清除磨台
D. 准备起吊工具

[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.

A. bedplates
B. columns
C. cylinder blocks
D. safety ca

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

A. a bridge gauge
B. a micrometer
C. a thermometer
D. a indicator

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

A. the cylinder weight
B. the cylinder bore
C. the cylinder length
D. the cylinder cover

[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.

A. commercially available
B. commercially
C. commercial available
D. commerce available

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

A. faster than dead slow speed
B. slower than dead slow speed
C. with the output of MCR
D. 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.

A. has to be handled
B. may be handled
C. has being handled
D. will be handling

[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 （）.

A. furnace to be re-purged
B. electric charge to buildup in the igniter
C. fuel pump to restart
D. dram level to stabilize

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