The power output of an I.C. Engine is measured by a rope brake dynamometer. The diameter of the brake pulley is 700 mm and the rope diameter is 25 mm. The load on the tight side of the rope is 50 kg mass and the spring balance reads 50 N. The engine running at 900 rev/min consumes the fuel, of calorific value 44000 kJ/kg, at a rate of 4 kg/h. assume g = 9.8 m/s2. Calculate
(a) Brake specific fuel consumption.
(b) Brake thermal efficiency