A four cylinder, four stroke petrol engine has the swept volume of 1750 c.c. It develops \(27 \mathrm{~kW}\) at \(1000 \mathrm{rpm}\). Mean effective pressure is \(5 \mathrm{bar}\). Find the average number of times the cylinder misfires every minute.

A single cylinder, four stroke, air cooled engine was tested and following observations were made : 

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Fuel consumption Air consumption Net brake load Speed Density of air Specific gravity of fuel Heating value of fuel Dynamometer constant, K = 50 c.c. in 1 min. 42 seconds; = 0.2 m in 32 seconds; = 8 N; = 3000 rpm; = 1.18 kg/m, = 0.74; = 44 MJ/kg; = = 5000;