A four stroke Otto cycle engine has a real power output of 80 kW, a volumetric compression ratioof 8.6:1 and runs at 4500 rpm at a pressure of 0.85 bar, 340 K. The mechanical losses are foundto be 30 % for this engine. Determine the ideal cycle efficiency, the friction power absorbed, the realefficiency and the swept volume required. Calculate the end pressures and temperatures in thecycle and superimpose them on a P-V diagram. Take qin = 2800 kJ/kg as the calorific value of thefuel.

What precautions should you take to prevent injuries when dealing with heavy loads?

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10