Problem 1: A four stroke internal combustion engine has the following specifications: - Brake power 7.5 kW; Speed = 1000 r.p.m.; Indicated mean effective pressure = 0.35 N/mm²;Maximum gas pressure = 3.5 N/mm2; Mechanical efficiency = 80 %. Determine: 1. The dimesions of the cylinder, if the length of stroke is 1.4 times the bore of the cylin- der; 2. Wall thickness of the cylinder, if the hoop stress is 35 MPa; 3. Thickness of the cylinder head and the size of studs when the permissible stresses for the cylinder head and stud materials are 45 MPa and 65 MPa respectively. Draw a neat sketch of the cylinder and show all critical dimensions.