The efficiency ratio of a four stroke petrol engine working on the ideal cycle is 0.60.It has four cylinders 7.6 cm by 11.4 cm having a compression ratio of 5 & consuming 7 Kg of petrol per hour when...

The efficiency ratio of a four stroke petrol engine working on the ideal cycle is 0.60.It has four cylinders 7.6 cm by 11.4 cm having a compression ratio of 5 & consuming 7 Kg of petrol per hour when running at 2000 RPM. Estimate the mean effective pressure. Take the calorific value of petrol as 42200 KJ/Kg.