1.

In an Otto cycle, air is compressed from 2.2 l to 2.26 l from an initial pressure of 1.2 kg/cm2. The net output/cycle is 440 kJ. What is the mean effective pressure of the cycle? (a) 227 kPa (b) 207 kPa (c) 192 kPa (d) 185 kPa

Answer»

(a) 227 kPa 

Mean effective pressure

\(\cfrac{Net \,work \,output}{Swept \,volume}\)

\(\cfrac{440}{(2.2-0.26)\times10^{-3}}\)

= 226.8 kpa

= 227 kpa



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