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單項選擇題

Fuel injectors used in heavy fuel oil systems are usually provided with cooling to reduce（）.

A.cold corrosion of the nozzles
B.fuel viscosity for better atomization
C.carbon accumulation on the nozzles
D.fuel detonation in the cylinders

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單項選擇題

The rate of fuel injection in a diesel engine cylinder depends primarily on （）.

A.the size of the holes in the fuel nozzle
B.timing of the pump
C.supply pressure to the pump
D.shape of the combustion chamber

單項選擇題

The camshaft on a four-stroke/cycle diesel engine provides a means to operate the （）.

A.fuel injectors
B.exhaust valves
C.intake valves
D.all of the above

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