Answer / prashant gill

theoretically, 2 stroke engine has ports whereas, 4 stroke
engine has valves. 2 stroke produces power for one
revolution of crankshaft whereas, 4 stroke produces same
power for two revolution of crankshaft.

practically, thermal eff. of 4 stroke is more than 2 stroke

sir i have applied for ntpc and engineers india can u suggest some books which have one words.

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