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單項(xiàng)選擇題

What determines the number of events occurring in a cycle of operation in an internal combustion engine?（）

A.Crankshaft revolution
B.Type of engine (diesel or gasoline)
C.Distance a piston travels during a stroke
D.Number of pistons

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單項(xiàng)選擇題

Which of the factors listed has the greatest effect on the mechanical efficiency of a diesel engine?（）

A.temperature of the intake air
B.friction within the engine
C.mechanical condition of the supercharger
D.mechanical condition of the turbocharger

單項(xiàng)選擇題

A practical way of checking for excessive fuel injection in one cylinder of an operating diesel engine is to （）

A.feel the high pressure fuel line
B.check the cylinder exhausts for white smoke frequently
C.check the cylinder exhaust temperature
D.isolate each cylinder and inspect the injector