Asingle-cylinder, single-acting air compressor running at 300 rpm is driven by a 23 kw electric motor. the mechanical efficiency of the drive between motor and compressor is 87%. the air inlet conditions are 1.013 bar and 15 °c and the delivery pressure is 8 bar. calculate the free-air delivery in m/min, the volumetric efficiency, and the bore and stroke of the compressor. assume that the index of compression and expansion is n = 1.3, that the clearance volume is 7% of the swept volume and that the bore is equal to the stroke.