ABC Water Treatment Operator Class II Vocabulary Game
Exam terms with clues and explanations by OpenExamPrep.
About the ABC Water Treatment Operator Class II Vocabulary Games
4 free word games built on 20 ABC Water Treatment Operator Class II terms across 5 topics. Every game deals terms at random and shows what each term means, so you can keep playing as long as you like.
How to Play
- 1.Read the clue and type the term (3 to 6 letters).
- 2.Green: right spot. Yellow: wrong spot. Gray: not in the term.
- 3.Solve it in 6 tries, then read the explanation.
- 1.Swap two neighboring tiles to line up 3 of the same term.
- 2.Longer lines, two lines at once and chains score more.
- 3.Play until no swap can make a line.
- 1.Flip two cards. A matching pair stays face up.
- 2.Each pair you find shows what the term means.
- 3.Clear the board in as few moves as you can.
- 1.Find each listed term in the letter grid.
- 2.Drag across its letters: across, down or diagonally.
- 3.Find all five as fast as you can.
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Topics in the ABC Water Treatment Operator Class II Vocabulary Game
Treatment process
Equipment operation and maintenance
Laboratory analysis
Source water characteristics
Compliance and administration
Sources for these terms (16)
- Finalization of Guidance on Incorporation of Water Treatment Effects on Pesticide Removal and Transformations in Drinking Water Exposure Assessments · Source checked 2026-11-06
- Guidance Manual for Compliance with the Surface Water Treatment Rules: Turbidity Provisions · Source checked 2026-11-06
- SWTR Fact Sheet - Requirements for Filtered Public Water Systems (EPA Region 8) · Source checked 2026-11-06
- Disinfection Profiling and Benchmarking Technical Guidance Manual · Source checked 2026-11-06
- Stage 1 and Stage 2 Disinfectants and Disinfection Byproducts Rules · Source checked 2026-11-06
- Analytical Methods Approved for Drinking Water Compliance Monitoring under the Disinfection Byproduct Rules · Source checked 2026-11-06
- Turbidity - Parameter Fact Sheet · Source checked 2026-11-06
- Secondary Drinking Water Standards: Guidance for Nuisance Chemicals · Source checked 2026-11-06
- Learn about Harmful Algae, Cyanobacteria and Cyanotoxins · Source checked 2026-11-06
- SCADA - NIST Computer Security Resource Center Glossary · Source checked 2026-11-06
- programmable logic controller - NIST Computer Security Resource Center Glossary · Source checked 2026-11-06
- Adjustable Speed Drive Part-Load Efficiency - Motor Systems Tip Sheet #11 · Source checked 2026-11-06
- NEMI Method Summary - EPA-NERL 330.5, Total Residual Chlorine by Spectrophotometer · Source checked 2026-11-06
- Personal Protective Equipment - Overview · Source checked 2026-11-06
- 29 CFR 1910.1200 - Hazard Communication · Source checked 2026-11-06
- 29 CFR 1910.134 - Respiratory Protection · Source checked 2026-11-06
About the ABC Class II Water Treatment Exam
Free practice for the ABC Class II Water Treatment Operator exam, now administered by Water Professionals International (WPI), covering treatment process, laboratory analysis, equipment operation and maintenance, source water characteristics, and security, safety and administrative procedures, including coagulation, filtration, disinfection CT, DBP control, corrosion control and operator math.
Exam sponsor: Association of Boards of Certification (ABC) / Water Professionals International (WPI). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Assessment
100 scored multiple-choice questions (plus up to 10 unscored pre-test questions) in five content areas; 10% are calculation items, given in US and metric units
Time Limit
180 minutes
Passing Score
70%
Exam / Certification Fees
Varies by state primacy agency; typical ABC exam fee plus state application fee
Exam sponsor websiteFees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Frequently Asked Questions
Is the ABC Class II Water Treatment vocabulary game free?
Yes. The game is free to play with no sign-up. Signing in adds AI explanations for any term.
How do the ABC Class II Water Treatment vocabulary games work?
There are 4 games built on 20 ABC Class II Water Treatment terms. In Guess the Term, a clue describes one term and you have six tries to spell it, with green, yellow and gray letters showing how close you are. In Term Match, six terms appear as colored tiles; swap neighbors to line up three or more of the same term, and each match shows what the term means. In Term Pairs, twelve face-down cards hide six pairs of terms; flip two at a time to find each pair, and every pair you find shows what the term means. In Term Search, five terms hide in a grid of letters, reading across, down or diagonally; drag across a term to circle it, and each term you find shows what it means.
Where do the ABC Class II Water Treatment terms come from?
OpenExamPrep researched each term from the Association of Boards of Certification (ABC) / Water Professionals International (WPI) content outline and primary sources, listed under Sources on this page. The game is independent study material, not an official exam resource.
Who administers the ABC Class II Water Treatment exam?
The Association of Boards of Certification (ABC), in partnership with Water Professionals International (WPI), develops and validates the Class II Water Treatment exam. It is delivered through state primacy agencies, who set jurisdiction-specific eligibility and renewal requirements.
How is Class II different from Class I?
Class II covers everything in Class I (basic treatment, disinfection residuals, operator safety, basic math) plus deeper coagulation chemistry, multimedia filtration design, CT calculations and Surface Water Treatment Rule compliance, DBP control, lime softening, membrane processes, and corrosion control. Which plants a Class II certificate lets you operate is set by your certifying authority.