A.A four-cylinder, four-stroke Diesel engine is to develop 30 kW at 1000 rpm. The stroke is 1.4 times the bore and the indicated mean effective pressure is 6.0 bar. Determine the bore and stroke of the engine. [1 76 mm, 246 mm] B. A 42.5-kW engine has a mechanical efficiency of 85%. Find the indicated power and friction power. If the friction power is constant with the load, what will be the mechanical efficiency at 60% of the load? [50 kW, 7. 5 kW, 77.3%]
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