Free EPA 608 diagnostic
Answer 20 original questions, see an explanation after each answer, and find topics to review next. The selection aims to follow the exam outline; topic proportions can differ in this small practice bank. Your score is study feedback, not a prediction of passing.
Outline used: 40 CFR part 82 subpart F, appendix D, section d (test content). Check the exam guide and official sources.
20 questions covering EPA 608 topics, with an explanation after every answer. No signup required; progress stays in this browser.
Already know where you are weak? You can build a study plan directly without taking the diagnostic first.
How the score works
Each topic's mastery is a recency- and difficulty-weighted correctness rate, shrunk toward "unknown" when you have answered fewer than three questions in it. Overall readiness is the sum of blueprint weight × topic mastery. Bands: Strong ≥ 80%, Developing 60–79%, Needs focused review below 60%. Full method on the methodology page.