Final Exam Fall 2002

Final Exam Fall 2002 - ME 114 Final Exam Fall 2002 Open...

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ME 114 Final Exam Fall 2002 Open book, open notes 150 points total Name ____________________________________ You must complete all of problems 1-8. You must do four of problems 9-13. Circle the problem number that you choose to skip . 9 10 11 12 13 If you work on all five of these problems, make sure you clearly mark which problem you’re choosing to skip. Don’t make me choose for you!
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1. (3) What physical characteristic(s) of a surface will cause it to act diffuse? 2. (4) Shown below are three graphs: one giving ε λ and α λ as a function of wavelength, another giving G λ as a function of wavelength, and the third giving E λ as a function of wavelength. Can the surface in this case be approximated as gray? Why or why not? 3. (4) Briefly discuss the unique properties of glass used in greenhouses that result in a warm temperature indoors. λ λ λ ε λ , α E G
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4. (3 pts) In the summer the air temperature inside of your house is maintained at 70 °F. You wear shorts and a t- shirt and feel comfortable. It is 90°F outside. In the winter the air temperature inside of your house is also maintained at 70 °F. You wear jeans and a sweater and feel slightly chilly. You live in Montreal, and it is 5°F outside. There are no drafts in your house. Why do you feel colder in the winter? 5. (3) Which type of double-pipe heat exchanger is more effective – a parallel flow or counterflow heat exchanger?
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This note was uploaded on 09/08/2010 for the course ME 114 at San Jose State.

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Final Exam Fall 2002 - ME 114 Final Exam Fall 2002 Open...

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