Part of the water operator pass
Water Treatment Class I practice exam: the full 100-question exam
100 questions · 180 minutes
100 questions in the official content counts. You get a score by category and topic, and an explanation for every option.
Before you start
- Every question has four options and one best answer.
- Content: Treatment Process 31, Laboratory Analysis 16, Equipment Operation and Maintenance 26, Source Water Characteristics 15, Security, Safety, and Administrative Procedures 12.
- Content-area counts are WPI’s; time limits and passing scores are set by each state, so our clock is 3 hours and results show your score by area.
- You can skip, go back, change answers and flag questions. The 180-minute clock keeps running in background tabs and reloads, and the exam is submitted when time runs out.
Game Assessment Prep is an independent practice site, not affiliated with or endorsed by Water Professionals International (WPI, formerly ABC), the California State Water Resources Control Board or the Texas Commission on Environmental Quality. Every question is original; none is taken from a certification exam, an official study guide or another prep provider.