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單項選擇題

A smoking exhaust from an operating diesel engine could be caused by （）

A.low sulfur content in the fuel
B.a loose injector inlet connection
C.late fuel injection
D.high injection pressure

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單項選擇題

What is commonly used to create turbulence in a diesel engine combustion system?（）

A.Shape of the piston crowns
B.Increasing the compression ratios
C.Increasing the piston crowns
D.Increasing the turbocharger gear ratio

單項選擇題

What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）

A.Spark plug
B.Heat of compression
C.Carburetor
D.Glow plug

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