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單項選擇題

On a four-stroke diesel engine, when the piston is driven downwards by the expanding gas, it delivers power to the crankshaft through the （）.

A.thrust block
B.sounding rod
C.connecting rod
D.push rod

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單項選擇題

On a diesel engine, fuel is delivered into the combustion space by （）.

A.a cooling system
B.a lubrication oil system
C.an electric system
D.an injection system

單項選擇題

Oil will lubricate these parts （） effectively than water.

A.much
B.more
C.most
D.less

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