Question: A four cylinder two stroke petrol engine with stroke to bore ratio of 1.2. develops (32 mathrm{~kW}) bp at 2500 r.p.m. The mean effective pressure

A four cylinder two stroke petrol engine with stroke to bore ratio of 1.2. develops $32 \mathrm{~kW}$ bp at 2500 r.p.m. The mean effective pressure on each piston is 8 bar and the mechanical efficiency is 85 percent. Determine -

(i) Diameter and stroke of each cylinder.

(ii) Brake thermal efficiency if the fuel consumption is $9 \mathrm{~kg} / \mathrm{hr}$ having C.V. of $44000 \mathrm{~kJ} / \mathrm{kg}$.

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