1) A reciprocating compressor has two stages with inlet airgoing into LP stage at 1 bar, 16°C and at the rate of 12 m3/min.Air is finally delivered at 7 bar and there is perfect intercoolingat optimum pressure between the stages. The index for compressionis 1.25 and compressor runs at 600 rpm. Neglecting clearance volumedetermine intermediate pressure and total power required.

2) A reciprocating compressor of single stage and double actingtype has free air delivered at 14 m3/min measured at 1.013 bar, 288K. Pressure and temperature at suction are 0.95 bar and 305 K. Thecylinder has clearance volume of 5% of swept volume. The air isdelivered at pressure of 7 bar and expansion and compression followthe common index of 1.3. Determine the volumetric efficiency withrespect to free air delivery.

3)1)Single stage impulse turbine has equal blade angles andnozzle angle of 15°. Determine the maximum possible bladeefficiency if the blade velocity coefficient is 0.85. Determine theblade speed to steam velocity ratio if the actual blade efficiencyis 90% of maximum blade efficiency.

4) The velocity of steam entering a simple impulse turbine is1000 m/s, and the nozzle angle is 200. The mean peripheral velocityof blades is 400 m/s and the blades are symmetrical. If the steamis to enter the blades without shock, what will be the bladeangles. Neglecting the friction effects on the blades, calculatetangential force on the blades and the diagram power for a massflow of 0.75 kg/s. Estimate axial thrust & diagramefficiency.

5)1)Single stage impulse turbine has equal blade angles andnozzle angle of 15°. Determine the maximum possible bladeefficiency if the blade velocity coefficient is 0.85. Determine theblade speed to steam velocity ratio if the actual blade efficiencyis 90% of maximum blade efficiency.