Water Treatment Operator Class III Practice Questions - ABC WPI Water Treatment Operator Class III Certification Exam

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ABC/WPI Class III water treatment certification typically authorizes operation of systems serving which approximate population range?

Under 500 people 500 to 3,300 people 3,300 to 50,000 people Greater than 100,000 people

Correct Answer:

3,300 to 50,000 people

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