单项选择题The lower end of each piston rod is reduced in diameter to fit a bore in ().

A.the crosshead
B.the journals of the crosshead
C.the crosshead shoes
D.the guides


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1.单项选择题The lower end of each piston rod is reduced in diameter to fit a bore in (), this being secured to the piston rod by a nut.

A.the crank-web
B.the connecting rod
C.the main bearing
D.the cross-head

5.单项选择题The joint face between the cylinder cover and the liner is arranged ()the combustion process as possible.

A.such far away from
B.such near by
C.as far away from
D.as near by

7.单项选择题The inner part of the condenser should be cleaned with ().

A.gas oil
B.diesel oil
C.chemical compound
D.Freon-12

8.单项选择题The injector pump is operated by a cam which drives the plunger ().

A.top and bottom
B.to and fro
C.up and down
D.back and forth

9.单项选择题The injector pump is operated by a cam which drives the () up and down.

A.piston
B.drum
C.plunger
D.barrel

10.单项选择题The injector pump is operated by a cam which drives () up and down.

A.the needle valve
B.the plunger
C.the piston
D.the cylinder