Question 9008 of 234 · California Wastewater Operator Exam
A chlorine dosage of 9.0 mg/L produces a residual of 1.5 mg/L after contact. What is the chlorine demand?
Exactly one answer is correct.
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Correct answer to question 9008
- B: 7.5 mg/L
Explanation
Chlorine demand = dosage - residual = 9.0 - 1.5 = 7.5 mg/L. Adding the residual to the dosage is a common error.
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