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單項選擇題

With regards to a diesel engine crankcase explosion, the most violent is the（）
(1) primary explosion
(2) secondary explosion

A.(1) only
B.(2) only
C.both (1) and (2)
D.neither (1) or (2)

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單項選擇題

Waterside scale in a fire-tube boiler may cause （）.

A.increased heat transfer
B.fireside erosion
C.high steam demand
D.overheated tubes

單項選擇題

The maximum pressure developed by a waste heat boiler is determined by the main engine exhaust （）.

A.gas composition
B.gas temperature
C.pressure
D.timing

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