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If the compression ratio of an engine working on Otto cycle...

This question belongs to Mechanical Engineering Internal Combustion Engines (I.C. Engines)
Internal Combustion Engines (I.C. Engines)
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If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the percentage increase in efficiency will be

Answer & Solution
Correct Answer: Option D
If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the percentage increase in efficiency will be 14%
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3 Comments
HARENDRA KUMAR
HARENDRA KUMAR 6 years ago
%INCREASE ={(Final value-Initial value)/Initial value}*100
%efficiency increase={(.540 - .474) / .474}=13.92%

Chakri Gatta
Chakri Gatta 7 years ago
Efficiency for compression ratio 5 is 48%
Efficiency for C.r 7 is 54%
So increase in %age of efficiency is 6%
How it’s 14%?
Sundar Raj
Sundar Raj 7 years ago
When compression ratio is 5 then efficiency will be 47.4% and when it is 7, efficiency will be 54%

Hence increase in efficiency is 6.6%
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