Before a marine diesel engine is started the cylinders and p

【名词&注释】

气缸套(cylinder liner)、十字头(crosshead)

[单选题]Before a marine diesel engine is started the cylinders and pistons must be （）.

A. cooled to appropriate temperature
B. warmed up gradually to appropriate temperature
C. opened up and renewed
D. ground and polished

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学习资料：

[单选题]F（r）直接反映出故障随（）变化的规律，故称为累积故障的概率。

A. 转速
B. 负荷
C. 时间
D. 工况

[单选题]下列（）情况下，必须对活塞运动部件进行校中。

A. 底角螺栓重新拧紧后
B. 主机发生曲轴主轴瓦抱轴事故
C. 更换气缸套、导板、十字头
D. 换新主轴承轴瓦

[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 gas loads on the engine structure are constrained by means of hydraulically preloaded （） which connect the bed plate, frame sections and cylinder jackets into a single unit.

A. connecting rods
B. main bearing
C. column
D. tie rod

[单选题]Prior to lighting off a cold automatically fired auxiliary boiler, you should （）.

A. check and regulate the water level
B. close the air cock once fires are lit
C. blowdown the gage glass
D. crack the steam stop to assure protective steam flow

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