Time for Math: 1. Change 95 mg/1 to pounds per gallon a. 792 Ib/gal. b. 1,139Ib/gal. c. 1,390 Ib/gal. d. 5,620 Ib/gal. 2. To which of the following temperatures on the centigrade scale does a reading of 95°F most nearly correspond? a. 35°C b. 37°C c. 127°C d. 63°C e. 18°C 3. How many gallons per minute is a flow of 1.0 mgd? a. 521 gpm b. 681 gpm c. 694 gpm d. 813 gpm e. 826 gpm 4. A wastewater treatment plant receives an average flow of 261 gpm with a strength of 225 mg/l BOD. What is the daily total flow to the plant? a. 0.15 mgd b. 0.30 mgd c. 0.32 mgd d. 0.38 mgd e. 4.8 mgd 5. If a plant receives 510 lb of BOD/day and the population equivalent (PE) is 0.17 lb BOD, what is the PE tributary to the plant? a. 170 b. 340 c. 510 d. 2,000 e. 3,000 Answers: 1. a 95 mg/L X 8.34 lb/gal = 2. a (F - 32) X 5/9 (5) / (9) = 0.56 (95 - 32) = 63 X 0.56 = 3. c (1 MGD) X (1,000,000) = (1,000,000 gpm) / (1440 min/day) = 4. d 261 gpm X 1440 min/day = (375840 gph) / (1,000,000) = 5. e [(Flow, MG)(BOD, mg/L)(8.34 lb/gal)] / (0.17 lbs/BOD/capita/day)
Posted on: Wed, 17 Sep 2014 15:54:55 +0000
Trending Topics
Recently Viewed Topics
© 2015