柴油机备车工作包括（）。Ⅰ.校对时钟与舵机；Ⅱ.暖机与各系统准备

【名词&注释】

不锈钢(stainless steel)、柴油机(diesel engine)

[单选题]柴油机备车工作包括（）。Ⅰ.校对时钟与舵机；Ⅱ.暖机与各系统准备；Ⅲ.开启舱底应急吸口阀；Ⅳ.转车、冲车与试车

A. Ⅰ＋Ⅱ＋Ⅲ
B. Ⅰ＋Ⅱ＋Ⅳ
C. Ⅱ＋Ⅲ＋Ⅳ
D. Ⅰ＋Ⅲ＋Ⅳ

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学习资料：

[单选题]油润滑艉轴密封装置的防蚀衬套选用（）制造。

A. 碳钢或铸铁
B. 镀铬钢套或不锈钢
C. 黄铜或不锈钢
D. 镀铬钢套或铸铁

[单选题]大型船舶传动轴系的校中安装方法有（）。Ⅰ.轴系按合理校中安装；Ⅱ.轴系按直线校中安装

A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ+Ⅱ
D. Ⅰ，Ⅱ

[单选题]What function is provided by the crankcase ventilation system on some diesel engines?（）

A. Increases the sludge forming tendency of lube oil
B. Prevents the accumulation of combustible gases
C. Improves lube oil cooling
D. Improves cold weather starting

[单选题]In readying an auxiliary water-tube boiler for a routine hydrostatic test, which of the following procedures should be undertaken prior to filling the boiler with fresh water?（）

A. The safety valve escape piping should be disconnected from the valve body and a blank inserted
B. The boiler vent valves should be opened
C. All handhole/manhole covers should be tightened up as much as possible to preclude any leaks
D. All of the above

[单选题]When there is a flame failure in an automatically fired auxiliary boiler, the （）.

A. air supply is shut off
B. fuel supply is shut off
C. water supply is shut off
D. safety valve lift

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