Full Practice Exam

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Verified pass standard: the California SWRCB Wastewater Treatment Plant Operator Grade III exam is scored on 97 points — 25 true/false questions at 1 point, 20 multiple-choice questions at 2 points, 6 multiple-choice essay questions at 2 points, and 10 mathematics questions at 2 points — in a 3.5-hour computer-based sitting, and the board’s Grade III examination information sheet (Rev. 2/2021) states the passing standard plainly: at least 68 of 97 points (70%) overall AND at least 10 of 20 points (50%) on the mathematics questions. This practice exam is scored at that same 70% overall mark on a 100-question four-option draw running on a 180-minute practice clock; the practice draw carries no separate mathematics sub-score. It is a study signal, not an SWRCB result.