Welcome to your Water Math Exam 1. How many feet of head would create a pressure of 130 psi? 300.3 Feet 56.27 Feet 260 Feet None Hint 2. What would the psi at an outlet at elevation of 419 ft? 697 lbs 967 psi 181.38 psi None of the Above None Hint 3. Pump runs 18 hours and pumps 120,000 gallons what is gpm pumping rate? 2.16 MGD 6666 gpm 111 gpm None Hint 4. How much would 150 gallons of water weigh? 1122 lbs 1251 lbs 346.5 lbs None Hint 5. What is detention time in minutes of 20 ft diameter tank 16 ft deep with flow of 1.5 MGD? Next question 5.559 minutes .02 minutes 36.07 minutes None Hint 6. How much force on 6" blind flange with 65 psi? 13,740 lbs 1836.9 lbs 150.15 ft None Hint 7. What would be the maximum pumping rate of a 30 hp pump with 100 ft of head? 1188 gpm 118800 gpm 30 gpm None of the above None Hint 8. City spends $166,000 per year and sells 750 MG, what is cost per 1,000 gallons? I drink bottled water who cares .00045 cents/1000 gal .22 cents/1000 gal $221.33/ 1000 gal None Hint 9. How many gallons in an 80 ft diameter tank filled 20 ft? 751,590 gallons 100,480 gallons .751 MG 382,976 gallons None Hint 10. How many gallons of water in an 18 inch pipe that is 5,500 ft long? .104 MGD 9714 gallons 72,663 gallons None of the above None Hint 11. How long will a 10,000 gallon tank flow at 250 gpm? 1336 gpm 40 min 6.94 min Who cares as long as it drains. None Hint 12. How many gallons in a rectangular tank 5 ft x 8 ft x 5 ft? 1496 gallons 200 gallons 1668 gallons None of the above None Hint 13. How many hours would it take to fill a 90 ft dia. tank 40 feet high pumping 2,400 gpm? 13 hours 13 min 24 hours 9 hours Will know once the overflow pipe spills. None Hint 14. How many pounds of 65% HTH would be needed to dose 300,000 gal. at 250 mg/L? 625.5 lbs 962 lbs Just dump the bucket in. None of the Above None Hint 15. How many pounds of 65% HTH would be needed to dose 3,500 ft of 12 inch pipe to 50 mg/L? 13.5 lbs 8.757 lbs 1234 lbs None of the Above None Hint 16. What would be the cost per day to chlorinate 4 MG at 1.5 mg/L if chlorine cost 20 cents per pound? $50.04 $5.00 $10.00 $1000.00 None Hint 17. A leak of 1 pint every 1.5 min. would leak how many gallons in 30 days? 3,602 gallons 28,814.4 gallons 960.48 pints Pints we by beer by the ounce! None Hint 18. What is the pumping rate in gpm if the pump drains 2' out of a 25' x 35' basin in 1 hr.? 1750 gpm 13090 gpm 130.90 gpm 218 gpm None Hint Please fill in the comment box below. Email Name Time's up
