Question 6005 of 229 · California Water Distribution Operator Exam
Why do bacteriological sample bottles contain sodium thiosulfate?
Exactly one answer is correct.
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Correct answer to question 6005
- C: To neutralize chlorine so it does not kill bacteria in transit
Explanation
Residual chlorine would continue to act in the bottle and give a false negative. The bottle is sterile and the chemical is added by the lab.
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