MCQ

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

Options

A) lower

B) higher

C) same

D) Can't say

Correct answer : option B ( solution discussed below)

Solution

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

If compression ratio is decreased then normal then knocking probelm is produce in diesel engine so compression ratio of petrol engine is high. (15 to 22)

the compression ratio of diesel engine is 15 to 22 and in petrol engine is only 6 to 10.

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

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