Practice Final - Name_ ME 326 Final Exam Dr. M. J. Hall May...

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Name_____________________________ ME 326 Final Exam Dr. M. J. Hall May 9, 2001 1)___________/25 pts 2)___________/25 pts 3)___________/25 pts 4)___________/25 pts
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Please! Be neat, write out equations before inserting numbers, and circle your answers. If you cannot figure out one part, assume an answer and carry it through the other parts. 1. (25%) The reservoir tank of the drinking water fountain on the 7th floor of the Mechanical Engineering Building initially contains 2 kg of chilled water at 15 ˚ C and a pressure of 200 kPa. Dr. Hall comes by and removes 0.5 kg of the 15 ˚ C, 200 kpa water for his coffee machine. An automatic valve then opens and fills the reservoir with 0.7 kg of water that is at 25 ˚ C and 300 kPa in the pipe. During the filling process and before the refrigeration unit comes on 5 kJ of heat passes from the surroundings to the reservoir. The temperature of the surroundings is 20 ˚ C. You may neglect the pressure dependence on the enthalpy of the water. Consider the initial state to be before the water was removed and the final state to be after
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This test prep was uploaded on 03/19/2008 for the course ME 326 taught by Professor Schmidt during the Spring '07 term at University of Texas at Austin.

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Practice Final - Name_ ME 326 Final Exam Dr. M. J. Hall May...

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