Question

The compression ratio in petrol engine is kept less than in Diesel engine because

a.

it makes petrol engines lighter

b.

higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition

c.

less compression ratio gives better performance

d.

it is just customary to have less compression ratio in petrol engines

Answer: (b).higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition

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Q. The compression ratio in petrol engine is kept less than in Diesel engine because

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