Free operator practice tests

Getting ready for an operator exam comes down to reps. These tests give you original questions written from the public frameworks real exams draw from, with worked answers that explain the why, not just which letter was right.

Pick practice mode to check every answer as you go, or timed exam mode to feel the clock. Your score breaks down by topic, weakest first, so you know what to study next. Progress saves on your device. No account, no signup, nothing to pay.

Tests cover operator math, water treatment, water distribution, wastewater treatment, wastewater collection, and federal regulations, written for entry-level certification. Every math answer is machine-checked. Fact questions carry a citation to the source.

These are practice questions, not leaked exam content, and not affiliated with ABC or your state program. Your state's rules set the real requirements, including the pass line. Check your certification program for specifics.

A free resource from Ziptility. We make software for small water systems.