301 Quiz_2

301 Quiz_2 - =(b out net L R W Q COP =(c L H H R Q Q Q...

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Name__________________________________________ 1 MAE 301: Engineering Thermodynamics I Spring 2010 Quiz 2 March 30, 2010 (Total 100 points, closed books and closed notes) 1. (15 points). In the presence of friction and other irreversibilities, can a heat pump have COP = 1? True ___________ False __________ 2. (15 points). The relation between COP HP and COP R is given by: (a) 1 + = R HP COP COP (b) 1 + = HP R COP COP (c) 1 1 + = HP R COP COP 3. (20 points). The coefficient of performance for a refrigeration cycle is given by (a) in net L R W Q COP ,
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Unformatted text preview: = (b) out net L R W Q COP , = (c) L H H R Q Q Q COP & & & − = (d) none of the above 4. (15 points). A process that violates the second law of thermodynamics also violates the first law of thermodynamics. True ___________ False __________ 5. (20 points). Which of the following is always true (mark all that applies): (a) ≥ HP COP (b) > R COP (c) 1 < th η 6. (15 points). A device cannot perform work using just one thermal energy reservoir. True ___________ False __________...
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This note was uploaded on 05/19/2010 for the course MAE 301 taught by Professor Hassan during the Spring '08 term at N.C. State.

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