正确答案: B

Ⅰ＋Ⅱ＋Ⅳ

题目：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

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学习资料的答案和解析：

[单选题]油润滑艉轴密封装置的防蚀衬套选用（）制造。

镀铬钢套或不锈钢

[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

Ⅰ+Ⅱ

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

Prevents the accumulation of combustible gases

[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?（）

The boiler vent valves should be opened

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

fuel supply is shut off