正确答案: B

换新

题目：当气阀阀面烧穿出现边缘孔洞时应（）工艺修复。

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学习资料的答案和解析：

[单选题]主机吊缸时必须明确拆卸范围，如吊B&W柴油机的活塞，其填料函一般（）；吊SULZER柴油机的活塞，其填料函一般（）。

必须一起吊出/不用一起吊出

[单选题]液压拉伸器是利用油压使螺栓（）后轻易地上紧或松脱螺栓。

产生弹性变形

[单选题]常规船的轴系包括（）。

船轴及其轴承

[单选题]If the engine does start on air, but combustion does not immediately begin, the cause may not be （）.

turning gear being still o

[单选题]The cooling water temperature （） over a period of 8 hours, and then shut down.

should be gradually reduced

[单选题]The main bearing shells often have a thin （） of lead or indium to provide a layer giving protection against corrosion.

flash

[单选题]You must take good care of the drainage cock of the air control systemBecause （） leads scale formed which might malfunction the pilot control valve and other instruments.

the humidity