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單項選擇題

For an ordinary four-stroke diesel engine the exhaust valves close （）.

A.after TDC
B.before TDC
C.after BDC
D.before BDC

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單項選擇題

For a main diesel engine the lube oil in the bearings is drawn from （）, usually located in the bedplate.

A.a gravity tank
B.a sump
C.a vessel
D.a bottle

單項選擇題

For a generator engine, after passing through the turbine the exhaust gas may be conducted out into the （）.

A.intercooler
B.open air
C.oil fired boiler
D.B and C

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