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單項(xiàng)選擇題

In describing engine operation, what does the term “cycle” mean?（）

A.The sequence of events that produce a power pulse
B.One rotation of the engine crankshaft
C.One stroke of a piston
D.All of the above

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單項(xiàng)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

單項(xiàng)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