Question 3016 of 229 · California Water Distribution Operator Exam

How is a chemical feed pump calibrated using a graduated cylinder?

Exactly one answer is correct.

AWeigh the pump motor and divide that weight by the line voltage of the pump
BCount the pump strokes per day and multiply by tank size
CTime the draw-down of a measured volume and convert the result to a rate
DMeasure the temperature of the discharge line

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Correct answer to question 3016

C: Time the draw-down of a measured volume and convert the result to a rate

Explanation

Draw a known volume from the cylinder over a timed interval to get ml per minute, then compare it with the setpoint. Adjust stroke or speed to match.