Evaluate the air standard efficiency of the cycle, Mechanical Engineering

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(a) Derive a mathematical expression for the efficiency of a dual cycle.

(b) An oil Engine working on a dual combustion cycle has a compression ratio 10 and cut-off takes place at 1/10 of the stroke. If the pressure at the beginning of compression is 1 bar and max. pressure is 40 bar. Evaluate the air standard efficiency of the cycle.


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