Effect of fluid specific heat ratio on efficiency of SI engine - Thermodynamics

Q.  How is the efficiency of the SI engine affected by change in specific heat ratio (γ) of the working fluid?
- Published on 19 Aug 15

a. the efficiency of the engine increases with increase in specific heat ratio (γ) of the working fluid
b. the efficiency of the engine decreases with increase in specific heat ratio (γ) of the working fluid
c. the efficiency of the engine does not affected by change in specific heat ratio (γ) of the working fluid
d. none of the above

ANSWER: the efficiency of the engine increases with increase in specific heat ratio (γ) of the working fluid

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