WPI Wastewater Collection Operator Class II exam
What the standardized wastewater collection operator Class II exam covers, and how to prepare for the collection systems level your state may map to it.
Exam format
- 100 scored multiple-choice questions.
- Up to 10 unscored pretest questions, unidentified and not counted.
- Time limit and passing score are set by your state (commonly 3 hours and 70%).
Content areas
We have not confirmed the question counts for this class, so no weights are shown. These are the content areas WPI uses for wastewater collection operator exams; confirm the Class II breakdown in WPI’s current Need-to-Know Criteria at gowpi.org.
- Equipment Operation, Evaluation, and Maintenance
- Collection System Operation, Maintenance, and Restoration
- Lift Station Operation and Maintenance
- Collection System Monitoring, Evaluation, and Adjustment
- Security, Safety, and Administrative Procedures
Does your state use this exam?
States choose whether to use WPI exams, and many name their license classes differently. Check how your state names this level before you plan around a WPI class number.
- California: Confirm with agency
- Florida: Confirm with agency
- New York: Confirm with agency
- Ohio: Class II
- Pennsylvania: Confirm with agency
- Texas: Class II
States on this site that use WPI-format exams: Ohio.
Prepare
- Free practice set
Original collection systems questions at the Grade 2 level.
- Grade 2 exam guide
Topics, math, and the national comparison for this level.
Math to practice
Study guides
Build your exam math
Water Operator Math Made Simple covers the formulas these exams rely on.
Water Operator Math Made Simple
A Step-by-Step Guide to the Math Every Water Operator Needs to Know
Frequently asked questions
- How many questions are on the Wastewater Collection Operator Class II exam?
- A WPI standardized exam has 100 scored multiple-choice questions. Up to 10 additional pretest questions may be mixed in; they are unidentified and do not count toward your score.
- How long is the exam and what score do I need?
- Time limits and passing scores are set by your state, not by WPI. Many states allow 3 hours and use a passing score of 70%, but some give higher classes more time. Confirm both with your certifying agency.
- Does my state use the WPI Class II exam?
- Each state decides which exams to use and what it calls its license classes. Some use WPI exams as they are, some use customized versions, and some write their own. Check your state's page on this site or ask your agency.
- Is this site affiliated with WPI or ABC?
- No. This is an independent study resource. WPI owns its exam questions, and nothing here reproduces them. Our practice questions are original.
Independent study material. Not affiliated with WPI or ABC. Exam content is owned by WPI.