A four cylinder two-stroke petrol engine with stroke to bore ratio 1.2 develops 35 kW brake power at 2,200 rpm. The mean effective pressure in each cylinder is 9 bar and mechanical efficiency is 78%....

A four cylinder two-stroke petrol engine with stroke to bore ratio 1.2 develops 35 kW brake power at 2,200 rpm. The mean effective pressure in each cylinder is 9 bar and mechanical efficiency is 78%. Determine: (i) Diameter and stroke of each cylinder, (ii) brake thermal efficiency, and (iii) indicated thermal efficiency. If fuel consumption 8 kg/h having C.V. = 43,000 kJ/kg.