單項選擇題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 rods


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1.單項選擇題The function of a lubricating oil is () to lubricate the running surface () to carry away a great deal of heat.

A.not;but
B.neither;nor
C.either;or
D.not only;but also

2.單項選擇題The fuel pipes and ducts should be blown with ().

A.atmosphere
B.the fresh water
C.compressed air
D.chemical compounds

3.單項選擇題The fuel oil system for a diesel engine can be considered in two parts--the fuel supply and the () systems.

A.fuel treatment
B.fuel combustion
C.fuel injection
D.fuel separating

5.單項選擇題The fuel injector pump is operated by () which drives the plunger up and down.

A.a separate motor
B.a cam
C.a generator
D.a chain