Wastewater Treatment Class IV Exam Prep

Current Status

Not Enrolled

Price

Inside this course

  • 500 original practice questions across 4 content areas, weighted to the 2025 Need-to-Know blueprint.
  • A fixed set of 12 free sample questions, so you can gauge the style before you buy.
  • A full 100-question practice exam (180 minutes) drawing fresh questions on every attempt.
  • Calculation items throughout — 16 of every 100 on the blueprint — all solvable from the WPI formula table for this exam family.
  • Our practice exam is scored against a 70% practice benchmark, set to mirror the 70% passing standard for the WPI standardized exams in the states that publish a cut score. PRACTICE BENCHMARK ONLY — your score here is a study signal, not a result on the real exam.

A drill for each of the 4 topics:

  • Treatment Process Evaluation and Adjustment
  • Equipment Evaluation, Maintenance, and/or Operation
  • Laboratory Analysis
  • Security, Safety, and Administrative Procedures

Course Content