It is very important that each cylinder should be （） scave

【名词&注释】

喷油泵(fuel injection pump)、四冲程柴油机(four-stroke diesel engine)、填料函式

[单选题]It is very important that each cylinder should be （） scavenged before the charged air is compressed.

A. well
B. good
C. excellent
D. respectively

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学习资料：

[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。

A. Ⅰ＋Ⅲ
B. Ⅲ
C. Ⅰ＋Ⅱ
D. Ⅱ

[单选题]偏移反映了两相邻轴轴心线呈（）的状态。

A. 平行
B. 不重合
C. 不平行
D. 相交

[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。

A. Ⅱ＋Ⅲ
B. Ⅰ＋Ⅱ＋Ⅳ＋Ⅴ
C. Ⅲ＋Ⅳ＋Ⅴ
D. Ⅱ＋Ⅲ＋Ⅳ

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

A. packings
B. piston rings
C. distributor rings
D. scraper ring

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

A. scale
B. sludge
C. chemicals
D. 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 （）.

A. mechanical lubricator
B. lubrication function
C. forced feed system
D. bearing lubricatio

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

A. as much fuel as
B. less fuel than
C. less fuel as
D. more fuel tha

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

A. They regulate the combustion cycle
B. They supply cooling water
C. They synchronize the ignition spark
D. They supply and regulate the lubricant flow

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