Question 6026 of 223 · California Water Treatment Operator Exam
A backwash rate of 15 gpm/sq ft is equal to a rate of rise of approximately
Exactly one answer is correct.
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Correct answer to question 6026
- B: 24 inches per minute
Explanation
Rate of rise = 15 x 12 / 7.48 = 24.1 in/min. Dividing 15 by 7.48 only gives 2.0 ft/min.
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