Water Distribution Class IV Exam Prep

Current Status

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:

Distribution System Components
Equipment Installation, Operation, Maintenance, and Repair
Water Quality Monitoring, Evaluation, Adjustment, and Laboratory Analysis/Interpretation
Security, Safety, Administrative Procedures, and Public Interactions

Lesson Content