Question 9028 of 234 · California Wastewater Operator Exam
The return activated sludge flow is 1.2 MGD and the influent flow is 3.0 MGD. What is the return rate as a percent of influent flow?
Exactly one answer is correct.
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Correct answer to question 9028
- C: 40%
Explanation
Percent return = RAS flow / influent flow x 100 = 1.2 / 3.0 x 100 = 40%. Inverting the ratio gives 250 percent.
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