During a test on a 3-cylinder four-stroke IC diesel engine with a cylinder bore and stroke length of 276 mm and 306 mm respectively, running at 547 r/min, the following results were obtained: 200.6 kg Mass on Dynamometer mass hanger (arm length = 0.815 m) Indicated mean effective pressure 428 kPa Fuel consumption (with Qnet,v = 39.8 MJ/kg, density = 0.944 kg/l) 6 ml/s Take acceleration due to gravity as 9.81 m per square seconds Calculate the mechanical efficiency in decimal fraction to 3 decimal places, No unit needed for answer

Q.1 formula (CH19O..1) produces 300 Nm @ 2400 rpm. The displacement volume of the engine is 2 litres and A 4-stroke, 4-cylinder diesel engine operating with bio-diesel fuel with an equivalent molecular the intake air flow rate is 69.6 g/s. LHV of fuel is 41 MJ/kg. Measurement of the engine exhaust gives the following volumetric concentrations: 200 ppm CO 32 mg soot / m of exhaust Assuming a brake thermal efficiency of 40%, density of exhaust as 1.15 kg/m' and molar mass of exhaust as 29 kg/kmol, determine the soot and CO emissions in g/kWh