Question 1021 of 229 · California Water Distribution Operator Exam
What chlorine to ammonia-nitrogen ratio, by weight, is typically targeted when making chloramines?
Exactly one answer is correct.
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Correct answer to question 1021
- C: Between 3:1 and 5:1
Explanation
A ratio of about 3:1 to 5:1 favors monochloramine. Ratios near 8:1 or higher start to form dichloramine and approach breakpoint, which makes taste and odor problems.
More questions: Disinfection
- 1022Which is an advantage of using chloramines instead of free chlorine in a distribution system?
- 1023Which problem is specific to chloraminated distribution systems?
- 1024Water that will be used for kidney dialysis or fish tanks needs special treatment when the system uses chloramines. Why?
- 1025On the chlorine dose curve, what is the breakpoint?
- 1026In a breakpoint chlorination curve, what makes up the residual after the breakpoint is passed?
- 1027What is the main cause of disinfection byproducts such as trihalomethanes in a distribution system?