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單項選擇題

An advantage of aluminum pistons, when compared to cast iron pistons is （）.

A.greater high temperature strength
B.better heat conductivity
C.greater weight per cubic inch
D.increased resistance to wear

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單項選擇題

Which of the combustion parameters listed is used in a diesel engine, but NOT related to the injection system?（）

A.Atomization
B.Metering
C.Effective stroke
D.Penetration

單項選擇題

Successful combustion inside the cylinders of a diesel engine is dependent upon （）.

A.fine atomization
B.high temperature
C.good mixing of fuel and air
D.all of the above

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