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全部科目 > 水路交通运输技能考试 > 海船船员考试 > 船舶管理(轮机专业) > 轮机英语 > 船舶电气与船舶安全

单项选择题

Black smoke exhausting from a diesel engine indicates（）

A.proper fuel injection
B.water in the fuel
C.incomplete combustion
D.burning of lube oil

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单项选择题

Engine operating conditions may be indicated by the color of the exhaust smoke.Black smoke could indicate（）

A.an insufficient speed droop setting
B.an overloaded engine
C.clogged drain holes in the oil control rings
D.complete combustion

单项选择题

A dark exhaust from a running diesel engine can be caused by （）

A.late ignition
B.water in the fuel
C.high compression temperature
D.starting valve stuck open

单项选择题

What color exhaust will be exhibited when a slow speed two-stroke/cycle main propulsion diesel engine, designed to operate on light and heavy fuel oil, is operated on insufficiently preheated heavy fuel oil?（）

A.White
B.Black
C.Blue
D.Clear

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