Question 2032 of 223 · California Water Treatment Operator Exam
A clearwell provides a T10 contact time of 40 minutes with a free chlorine residual of 1.2 mg/L. What is the CT?
Exactly one answer is correct.
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Correct answer to question 2032
- B: 48 mg/L-min
Explanation
CT = 1.2 mg/L x 40 min = 48 mg/L-min. Dividing the time by the residual gives 33.
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