正确答案: B

Ⅰ＋Ⅳ＋Ⅴ

题目：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。

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学习资料的答案和解析：

[单选题]强化气缸套内圆表面的方法主要有（）等工艺，使表面耐磨性、抗咬合性提高来防止拉缸事故。Ⅰ.松孔镀铬；Ⅱ.镀铁；Ⅲ.离子氮化；Ⅳ.硬质镀铬；Ⅴ.喷钼。

Ⅰ＋Ⅲ＋Ⅴ

[单选题]如果采用（）时，底脚螺栓可以不用紧配螺栓。

环氧垫块

[单选题]水润滑艉轴承首端设置填料函式密封装置是为了（）。

防止海水流入机舱

[单选题]Keep compartment （） as the gas given off can be dangerous.

well ventilated

[单选题]The inner part of the condenser should be cleaned with （）.

chemical compound

[单选题]A change in the degree of fuel atomization in a diesel engine would most greatly affect （）.

fuel penetration

[单选题]When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.

drain and then renew the lube oil supply