Question 2004 of 229 · California Water Distribution Operator Exam
Which backflow prevention method provides the highest level of protection?
Exactly one answer is correct.
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Correct answer to question 2004
- B: Air gap
Explanation
An air gap is a physical vertical separation with no mechanical parts that can fail. A single check valve is not accepted as a backflow preventer for health hazards.
More questions: Distribution System Design and Hydraulics
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