Journey of Life

2010 Rajiv Gandhi Proudyogiki Vishwavidyalaya(Technical University) B. E Civil engineering science MODEL QUESTION PAPER 2010, RGPV, Bhopal, Thermo fluid for Civil Engg. Question musical composition (1) Air enters a nozzle steady at 2. 21 kg/m3 and 30 m/s and leaves at 0. 762 kg/m3 and clxxx m/s. If the inlet welkin of the nozzle is 80 cm2 , rig the agglomerate course rate and the buy the farm area of the nozzle. (2) A frictionless piston piston chamber device initially contains 200L of saturated refrigerant-134a.The piston is free to move and its potful is such that it maintains a pressure of 800kPa on the refrigerant. The refrigerant is now het up(p) until its temperature rises to 500C. Calculate work done during the process. (3) A steam power mark receives heat from the furnace at a rate of 280GJ/h. Heat losses to the surround air from the steam as it passes through the components of the power plant is 8GJ/h. The ware heat transferred to the cooling water is 145GJ/h.De termine the net power out mould of the plant and the thermal efficiency of the plant. (4) (1) Air enters an adiabatic nozzle steadily at 300 kPa, 200oC and 30 m/s. It leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm2. Find the rush flow rate through the nozzle, temperature at the exit of the nozzle and the area of the nozzle at its exit. (5)Air is heated in a circular duct by a 15 KW electric heating arrangement placed inside the duct.Air enters the duct at 100 kPa and 170C with a mass flow rate of 150 m3/ min. If the heat lost from the duct to the milieu is at a rate of 200 J/s, determine the exit temperature of the air. (6) Steam enters an adiabatic turbine at 10MPa and 5000C at a rate of 3 kg/s and leaves at 200kPa. If the power out put of the turbine is 2MW, determine the temperature of the steam at the exit. Neglect the changes in kinetic and potential energy.