單項(xiàng)選擇題Black smoke exhausting from an operating diesel engine can be caused by ()

A.fuel dribbling from leaking fuel injectors
B.burning fuel with a high carbon content
C.burning fuel with a high vanadium content
D.burning fuel with a lower sulphur content


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1.單項(xiàng)選擇題White smoke exhausting from a diesel engine can be caused by a ()

A.high combustion temperature
B.high compression pressure
C.cracked cylinder liner
D.fuel with a high vanadium content

2.單項(xiàng)選擇題White smoke exhausting from a diesel engine can be caused by ()

A.low combustion temperature
B.a leaking fuel nozzle check valve
C.late fuel injection
D.plugged oil-scraper ring hole

3.單項(xiàng)選擇題White smoke issuing from the exhaust of an auxiliary diesel engine valve opening ()

A.the engine is overloaded
B.the engine is cold
C.there is too much lube oil in the cylinders
D.the turbocharger is fouled

4.單項(xiàng)選擇題White smoke exhausting from a diesel engine can result from ()

A.high exhaust temperature
B.high lube oil temperature
C.low turbo-charger speed
D.low cooling water temperature

5.單項(xiàng)選擇題White smoke exhausting from an operating diesel engine may indicate ()

A.a cracked liner
B.burning lube oil
C.an overloaded engine
D.insufficient combustion air