Question 4018 of 223 · California Water Treatment Operator Exam
Which method uses a color change to show the presence of coliform bacteria in a 100 mL sample with only a yes or no answer?
Exactly one answer is correct.
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Correct answer to question 4018
- C: Presence-absence test
Explanation
P/A tests show whether coliforms are present in the 100 mL sample. Routine compliance samples under the Total Coliform Rule are reported as present or absent.
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