Welcome to your Water Math Exam

1. **How many feet of head would create a pressure of 130 psi?**Hint

2. **What would the psi at an outlet at elevation of 419 ****ft****?**Hint

3. **Pump runs 18 hours and pumps 120,000 gallons what is ****gpm**** pumping rate?**Hint

4. **How much would 150 gallons of water weigh?**Hint

6. **How much force on 6" blind flange with 65 psi?**Hint

7. **What would be the maximum pumping rate of a 30 ****hp**** pump with 100 ****ft**** of head?**Hint

8. **City spends $166,000 per year and sells 750 MG, what is cost per 1,000 gallons?**Hint

9. **How many gallons in an 80 ****ft**** diameter tank filled 20 ****ft****?**Hint

10. **How many gallons of water in an 18 inch pipe that is 5,500 ****ft**** long?**Hint

11. **How long will a 10,000 gallon tank flow at 250 ****gpm****?**Hint

12. **How many gallons in a rectangular tank 5 ****ft**** x 8 ****ft**** x 5 ****ft****?**Hint

13. **How many hours would it take to fill a 90 ****ft**** dia. tank 40 feet high pumping 2,400 ****gpm****?**Hint

14. **How many pounds of 65% HTH would be needed to dose 300,000 gal. at 250 mg/L?**Hint

15. **How many pounds of 65% HTH would be needed to dose 3,500 ****ft**** of 12 inch pipe to 50 mg/L?**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?**Hint

17. **A leak of 1 pint every 1.5 min. would leak how many gallons in 30 days?**Hint

18. **What is the pumping rate in ****gpm**** if the pump drains 2'**** out of a 25'**** x 35'**** basin in 1 hr.?**Hint