正确答案: D

respectively

题目：It is very important that each cylinder should be （） scavenged before the charged air is compressed.

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学习资料的答案和解析：

[单选题]四冲程柴油机在吊缸检修完毕后，试车前必须对各缸的进、排气间隙进行检查和调整。只有当某缸的（）凸轮在基圆上时，才可以检查该缸的进气间隙。Ⅰ.喷油泵；Ⅱ.进排气；Ⅲ.进气。

Ⅲ

[单选题]偏移反映了两相邻轴轴心线呈（）的状态。

平行

[单选题]填料函式艉轴密封装置要求换新填料安装时应（）。Ⅰ.材质不变；Ⅱ.每圈长度恰好对接；Ⅲ.各道填料接口错开；Ⅳ.填料的圈数不变；Ⅴ.必须全部更换。

Ⅱ＋Ⅲ

[单选题]Each piston stuffing box is provided with two sealing rings and three（）

scraper ring

[单选题]Head tank should be used to remove （） from cooling water.

air

[单选题]The common method of applying oil to the cylinder walls is by means of small pump assembled in units, known as （）.

mechanical lubricator

[单选题]A diesel engine burns （） a gasoline engine of the same capacity in the same period of time.

more fuel tha

[单选题]What is the purpose of the intake/exhaust valves in a diesel engine? （）

They regulate the combustion cycle