当气阀阀面烧穿出现边缘孔洞时应（）工艺修复。

【名词&注释】

塑性变形(plastic deformation)、柴油机(diesel engine)、填料函(stuffing box)

[单选题]当气阀阀面烧穿出现边缘孔洞时应（）工艺修复。

A. 喷涂或喷焊
B. 换新
C. 堆焊
D. 镀铬或镀铁

查看答案&解析 查看所有试题

学习资料：

[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（）。

A. 必须一起吊出/必须一起吊出
B. 不用一起吊出/必须一起吊出
C. 必须一起吊出/不用一起吊出
D. 不用一起吊出/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。

A. 受拉
B. 产生变形
C. 产生弹性变形
D. 产生塑性变形

[单选题]常规船的轴系包括（）。

A. 中间轴和中间轴承
B. 艉轴和艉轴承
C. 艉轴和艉轴承
D. 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 （）.

A. low compression
B. failure of the fuel pump to discharge fuel
C. incorrect timing of fuel pump
D. turning gear being still o

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

A. should be gradually increased
B. should be gradually reduced
C. should be constantly kept
D. should be varied up and dow

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

A. flange
B. flash
C. plate
D. sheet

[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.

A. the temperature
B. the rust
C. the pressure
D. the humidity

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