Coagulation and Filtration Practice Questions
Treatment processes are 25 to 35 questions on the California T exams and 31 to 32 on WPI’s Class I and II water treatment exams. Practice how particles are removed.
100 questions in the official content counts, with a score for every area and an explanation for every option.
Or try the free coagulation and filtration drill- 32 original coagulation and filtration questions, every option explained
- Tested on 8 of our 25 practice exams
Why must sludge be removed regularly from sedimentation basins?
What our coagulation and filtration questions cover
- Coagulants, coagulant aids and charge neutralization
- Flash mixing, tapered flocculation and jar testing
- Sedimentation basins, tube settlers, floc carryover and sludge removal
- Filter runs, head loss, breakthrough, backwash, air scour and filter-to-waste
- Filter problems: mudballs, cracking, air binding; membranes and DAF
This list is our own summary, written for practice. The exam owners publish their outlines: California’s Expected Range of Knowledge, TCEQ’s Need-to-Know Criteria and WPI’s Need-to-Know Criteria.
Drill coagulation and filtration, then sit a full practice exam
100 questions in the official content counts, with a score for every area and an explanation for every option.
Or try the free coagulation and filtration drillIdeas the questions test most
- Conventional order: coagulation, flocculation, sedimentation, filtration, disinfection.
- Alum uses alkalinity; low-alkalinity water may need lime or soda ash.
- Backwash on head loss, turbidity breakthrough or run time, whichever comes first.
- Change filter rates slowly to avoid turbidity spikes.
Start the free coagulation and filtration drill · California T2 practice test · California T1 practice test · California T3 practice test · California T4 practice test · TCEQ Class D Water practice test · TCEQ Class C Surface Water practice test
Common questions
Is jar testing on the California T1 exam?
The Expected Range of Knowledge tags jar testing and coagulant dose calculations T3–T4. Filtration objectives such as interpreting turbidity start at T1, and backwash and filter production calculations at T2.
What causes mudballs in a filter?
Backwash that is too gentle or too short to clean the media. Solids and media cement together, the bed compacts and water short-circuits.
100 questions in the official content counts, with a score for every area and an explanation for every option.
Or try the free coagulation and filtration drillMore operator topics
- Source Water and Wells
- Water Disinfection and Chlorination
- Corrosion, Iron, Manganese and Fluoride
- Water Lab and Sampling
- Water Mains, Valves and Hydrants
- Distribution Hydraulics and Storage
- Cross-Connection and Backflow
- Drinking Water Regulations
- Water Math
- Pumps, Motors and Equipment
- Operator Safety
- Management, Records and Customer Service
Outlines used for these questions: Expected Range of Knowledge, Drinking Water Treatment Exam (rev. 4/2020, PDF) · Expected Range of Knowledge, Drinking Water Distribution Exam (rev. 4/2020, PDF) · TCEQ: Need-to-Know Criteria for public water system operators · TCEQ: What applicants for wastewater licenses need to know · WPI: 2025 Need-to-Know Criteria.
Game Assessment Prep is an independent practice site, not affiliated with or endorsed by Water Professionals International (WPI, formerly ABC), the California State Water Resources Control Board or the Texas Commission on Environmental Quality. Every question is original; none is taken from a certification exam, an official study guide or another prep provider.