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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

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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

單項選擇題

If a diesel engine fails to start，one of the likely causes is （）

A.low compression temperature
B.low ambient air pressure
C.high lube oil pump pressure
D.high fuel oil booster pump pressure

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