SSC JE Mechanical Engineering 2015 Paper

Question : 123 of 200

Marks: +1, -0

The Otto cycle thermal efficiency, with usual notation, is given as, where r is compression ratio and

γ

is the adiabatic index

Solution:

Otto cycle,

η={o\/p}/{i\/p}=1-T_1/T_2=1-(1/{\r^{\γ–1}})

r=V_1/V_2

(compression ratio)
The Otto cycle thermal efficiency, with usual notation in given by

η _0 = 1 - (1/{\r^{\γ–1}})

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