Question 1008 of 229 · California Water Distribution Operator Exam
Which form of chlorine is 100 percent available chlorine?
Exactly one answer is correct.
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Correct answer to question 1008
- B: Chlorine gas
Explanation
Chlorine gas (Cl2) is pure chlorine, so no purity correction is needed in a dosage calculation. The hypochlorites contain only part available chlorine.
More questions: Disinfection
- 1009A chlorine dose of 3.0 mg/L produces a free chlorine residual of 0.8 mg/L after the contact time. What is the chlorine demand?
- 1010Which substances commonly create chlorine demand in a distribution system?
- 1011The total chlorine residual equals which combination?
- 1012Which test is most often used by operators in the field to measure chlorine residual?
- 1013A sudden drop of chlorine residual at a dead-end hydrant most likely points to what?
- 1014Before a newly disinfected main is placed in service, what must the bacteriological samples show?