This is a poundage/dosage math practice test.
1. How many gallons of water will 834 pounds of sodium hydroxide treat, if the sodium hydroxide dosage is 20 mg/L?
A. 834,000 gallons
B. 20.0 million gallons
C. 5.0 million gallons
D. 1.2 million gallons
2. How many pounds of ferric sulfate will be needed to treat one million gallons of water with a ferric sulfate dosage of 70 ppm?
A. 584 pounds
B. 7000 pounds
C. 5842 pounds
D. 3086 pounds
3. How many pounds of polymer will be consumed, if the polymer is used to treat one million gallons of water with a dosage of 1.0 mg/L?
A. 1 pound
B. 8.34 pounds
C. 100 pounds
D. None of the above
4. What is a water treatment plant's zinc orthophosphate dosage, if the plant uses 8.34 pounds of zinc orthophosphate to treat one million gallons of water?
A. .5 mg/l
B. 1.0 mg/l
C. 1.5 mg/l
D. 2.0 mg/l
5. How many gallons of water will two thousand pounds of alum treat, if the alum is used at a dosage of sixty parts-per-million?
A. 1 million gallons
B. 2 million gallons
C. 3 million gallons
D. 4 million gallons
6. How many pounds of lime are needed to dose ten million gallons of water with a lime dosage of 3 mg/L?
A. 100 pounds
B. 175 pounds
C. 250 pounds
D. 325 pounds
7. What is a water treatment plant's sodium hydroxide dosage, if the plant uses five hundred pounds of sodium hydroxide to treat five million gallons of water?
A. 1 ppm
B. 5 ppm
C. 8.34 ppm
D. 12 ppm
8. How many gallons of water can be treated by 50 pounds of polymer at a polymer dosage of .5 mg/L?
A. 1,000,000 gallons
B. 5,000,000 gallons
C. 12,000,000 gallons
D. 25,000,000 gallons
9. How many pounds of ferric sulfate are needed to treat one hundred million gallons of water with a ferric sulfate dosage of seventy milligrams-per-liter?
A. 5,838 pounds
B. 58,380 pounds
C. 583,800 pounds
D. 83,800 pounds
10. How many pounds of alum will be needed to treat one-half million gallons of water with an alum dosage of 40 ppm?
A. 40.2 pounds
B. 166.8 pounds
C. 400.5 pounds
D. 500.3 pounds
ANSWERS: 1. C; 2. A; 3. B; 4. B; 5. D; 6. C; 7. D; 8. C; 9. B; 10. B