The compression ratio for petrol engine is ......... than engine

      

MCQ  

The compression ratio for petrol engine is ......... than engine 



Options 

A) same

B) higher

C) lower 

D) Can't say 


Correct answer : option C ( solution discussed below)



Solution

In petrol  engine ignition is produce with the help of spark plug and in diesel engine ignition is produce by using compression air. so in petrol engine lower compression ratio must be required for burning than diesel engine. 

If compression ratio is increased then normal then knocking probelm is produce in petrol engine so compression ratio of petrol engine is low. (5 to 10)

the compression ratio of petrol engine is 5 to 10 and in diesel engine is only 15 to 22.

i.e. Compression ratio of petrol engine is lower than diesel engine.

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