Trickling Filters, RBCs and Ponds Questions
California’s Grade II exam and Texas’s Class D criteria both list ponds and trickling filters. Practice fixed-film and lagoon systems.
50 true/false, 30 multiple choice and 10 math problems on the 150-minute clock, scored on points like the real exam, with an explanation for every option.
Or try the free filters and ponds drill- 27 original filters and ponds questions, every option explained
- Tested on 7 of our 25 practice exams
In a facultative wastewater pond, what supplies most of the oxygen in the upper layer?
What our filters and ponds questions cover
- How trickling filters and RBCs treat wastewater
- Recirculation, sloughing, ponding, flies and distributor arms
- RBC staging and overloading
- Facultative ponds: algae, daily DO and pH swings, dike care
- Aerated lagoons and series operation
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 filters and ponds, then sit a full practice exam
50 true/false, 30 multiple choice and 10 math problems on the 150-minute clock, scored on points like the real exam, with an explanation for every option.
Or try the free filters and ponds drillIdeas the questions test most
- Keep trickling filter media wet to control flies.
- White growth on an RBC first stage means overloading.
- Pond DO is lowest at dawn.
- No trees on dikes.
Start the free filters and ponds drill · California Wastewater Grade II practice test · California Wastewater Grade I practice test · TCEQ Class D Wastewater practice test · TCEQ Class C Wastewater practice test · TCEQ Collection Class I practice test · Wastewater Treatment Class I practice test
Common questions
Why recirculate a trickling filter?
To keep the media wet, dilute strong influent, even out loading and help control ponding and filter flies.
Where does pond oxygen come from?
Mostly from algae photosynthesis in the upper layer, plus wind mixing; aerated lagoons add mechanical aeration.
50 true/false, 30 multiple choice and 10 math problems on the 150-minute clock, scored on points like the real exam, with an explanation for every option.
Or try the free filters and ponds drillMore operator topics
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.