Q. 49 An ideal reheat Rankine cycle operates between the pressure limits of 10 kPa and 8 MPa, with reheat being done at 4 MPa. The temperature of steam at the inlets of both turbines is 500C and the enthalpy of steam is 3185 kJ/kg at the exit of the high pressure turbine and 2247 kJ/kg at the exit of low pressure turbine. The enthalpy of water at the exit from the pump is 191 kJ/kg. Use the following table for relevant data. Superheated steam temperature (C) Pressure v(m/kg) h (kJ/kg) s (kJ/kg.K) (MPa) 500 4 0.08644 3446 7.0922 500 8 0.04177 3399 6.7266 Disregarding the pump work, the cycle efficiency (in percentage) is Q. 52 During pure orthogonal turning operation of a hollow cylindrical pipe, it is found that the thickness of the chip produced is 0.5 mm. The feed given to the zero degree rake angle tool is 0.2 mm/rev. The shear strain produced during the operation is