Collection Systems · Intermediate
Grade 2 Collection Systems Operator Exam
Intermediate certification for operators running day-to-day operations at small to mid-size systems.
Applied math is a significant part of the Grade 2 collection systems exam.
Practicing calculations like dosage, detention time, and loading before test day is one of the most effective ways to prepare, alongside reviewing your state’s official exam content outline.
Exam facts
Grade/class terminology and exact requirements vary by state. The figures below are national baselines; find your state’s own grade names and rules on its certification page.
| Grade level | Grade 2 |
|---|---|
| Questions | 100 |
| Time limit | 150 minutes |
| Passing score | 70% |
| Difficulty | Intermediate |
Prerequisites
- Grade 1 certification (in most states)
- 1–2 years of operating experience
Requirements vary by state — check your state page for exact rules.
What's on the exam
- Gravity sewer design and maintenance
- Lift stations and force mains
- Inflow and infiltration (I&I)
- Sewer cleaning and CCTV inspection
- Manhole rehabilitation
- Confined space entry and safety
- Process control adjustments
- Applied treatment math
The math on the Collection Systems exam
These calculations are commonly included in collection systems operator exam preparation and may appear on your exam depending on your certification level and state. Practicing them is one of the most effective ways to prepare.
- Pipe slope and velocity
- Wet well volume and pump cycle time
- Flow rate (Manning's equation basics)
- Pump horsepower
- Force main detention time
- Infiltration rate (gpd per inch-mile)
Free Grade 2 practice questions
Try a few sample questions with full explanations.
Take the practice quiz →