單項(xiàng)選擇題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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1.單項(xiàng)選擇題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

2.單項(xiàng)選擇題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

4.單項(xiàng)選擇題Combustion knock will most likely occur as a result of using a fuel with()

A.low ignition quality
B.a high volatility
C.low ignition delay
D.a high cetane number

5.單項(xiàng)選擇題High exhaust temperatures from all of cylinder of a turbocharged, four-stroke/cycle diesel engine can be caused by an()

A.inoperative turbocharger
B.inadequate fuel supply
C.overload on one cylinder
D.unequal load distribution