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EML4304C Test 1 Summer 2009

# EML4304C Test 1 Summer 2009 - EML 4304C Each question worth...

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EML 4304C Test 1 - Summer 2009 Name_______________________ Page 1 of 7 Each question worth 10 points. 1a) The head loss for this system is a) 555.1 m b) 777.2 m c) 421.8 m d) 126.2 m e) 897.2 m f) 523.4 m 1b) The average velocity of the oil in terms of flow rate ± and diameter D is a) 2 4 D ± b) 2 4 D π ± c) 4 D π ± d) 2 4 m D π ± e) 2 4 D π ± f) 2 4 D π ± 1c) Starting with the equation 2 2 L L V h f D g = , eliminate V from this equation and find head loss h L in terms of friction factor f , gravity g , , length L , and diameter D . ± a) 2 2 5 8 L f g D π ± b) 2 5 8 L f gD ± c) 2 5 16 L f g D π ± d) 2 2 5 2 L f g D π ± e) 2 2 2 16 L f g D π ± f) 2 2 5 16 L f g D π ± 1d) Using your results from the previous question (1c), find the friction factor f in terms of h L , D , g , L , and flow rate ± . a) 2 5 2 L h gD L π ± b) 2 5 2 8 L h gD L π ± c) 5 2 8 L h gD L ± d) 2 4 2 8 L h gD π ± e) 2 5 2 8 gD π ± f) 2 5 2 8 gD L π ± 1e) Assuming the flow is laminar, the friction factor in terms of Reynolds number is a) 64 Re b) 1.11 6.9 1.8log Re 3.7 e D + c) 2.51 Re f d) Re 64 e) 3.7 D ε f) 64 D ε 1f) Using your results from the previous question (1e), find the friction factor f

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