Question

how many type of engine?

Answer 1

Two stroke and four stroke petrol and diesel engine are the examples of internal combustion engine. There aredifferent types of internal combustion (I.C.) engine and there classification depends upon various basis.

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Answer 2

basically., there r two types of enginees
1. Internal combustion engine;-
 the combustion of fuel takes place inside the engine .
whereas, 
2.External combustion engine;-
 the combustion of fuel takes place outside the engine