Operator Master

Level I Level II Practice Exam Math Center Lab Course About

Start Practicing

Operator Master

Free exam practice for Washington wastewater treatment operators.

Account About Support Privacy Terms Exam Disclaimer

Appearance

Operator Master is independent and is not affiliated with WPI, PSI, ABC or the Washington State Department of Ecology.

Free sample questions

Washington Wastewater Operator Practice Questions

Free sample questions by topic for the Washington Level I and Level II wastewater treatment operator exams. Each one shows the answer and an explanation.

Level I

Level I Sample Questions

Plant Operations53 questions
Math and Calculations10 questions
Pumps and Hydraulics8 questions
Secondary Clarification5 questions
Biological Treatment4 questions
Headworks and Screening4 questions
Grit Removal2 questions
Laboratory2 questions
Primary Treatment2 questions

Level I Study Guide→

Level II

Level II Sample Questions

Plant Operations35 questions
Math and Calculations21 questions
Pumps and Hydraulics18 questions
Biological Treatment11 questions
Laboratory9 questions
Disinfection7 questions
Solids Handling7 questions
Secondary Clarification5 questions
Primary Treatment3 questions
Grit Removal2 questions

Level II Study Guide→

Start Practice Wastewater Math Formulas

Operator Master is independent. It is not affiliated with WPI, PSI, ABC or the Washington State Department of Ecology, does not reproduce live exam content and does not guarantee a passing score.