North Carolina Water/Wastewater Operator Vocabulary Game
Exam terms with clues and explanations by OpenExamPrep.
About the North Carolina Water/Wastewater Operator Vocabulary Game
A free word game for the North Carolina Water/Wastewater Operator exam. Each round shows a clue for one of 20 exam terms across 5 topics. Recall the term, spell it out, then read a short explanation. Rounds pick a random term, so you can keep playing as long as you like.
How to Play
- 1Read the clue and type a term with the right number of letters (3 to 6). Abbreviations count: type the letters only.
- 2Press Check Answer or Enter. Each letter changes color to show how close you are.
- 3You have 6 tries. Stuck? Need a hint? asks the AI tutor for a nudge without giving the term away, and Skip moves to a new term.
- 4After the round, read the explanation, ask the AI to explain it, share your result, or press Next.
- ARight letter, right spot
- AIn the term, wrong spot
- ANot in the term
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Topics in the North Carolina Water/Wastewater Operator Vocabulary Game
NC State Laws and Regulations
Water Treatment
Wastewater Treatment
Distribution and Collection Systems
Laboratory Testing and Safety
Sources for these terms (18)
- National Pollutant Discharge Elimination System (NPDES) · Source checked 2026-11-04
- 40 CFR 141.2 - Definitions (National Primary Drinking Water Regulations) · Source checked 2026-11-04
- Overview of Drinking Water Treatment Technologies · Source checked 2026-11-04
- Stage 1 and Stage 2 Disinfectants and Disinfection Byproducts Rules · Source checked 2026-11-04
- National Primary Drinking Water Regulations · Source checked 2026-11-04
- Optimize Your Wastewater Plant Operations; Save Energy - Save Money; Reduce Nutrient Discharge (EPA webinar, October 21, 2021) · Source checked 2026-11-04
- Wastewater Technology Fact Sheet: Package Plants (EPA 832-F-00-016, September 2000) · Source checked 2026-11-04
- What is a Wastewater Lagoon? (EPA 832-F-25-009, July 2025) · Source checked 2026-11-04
- 5.2 Dissolved Oxygen and Biochemical Oxygen Demand (Monitoring & Assessment, EPA archive) · Source checked 2026-11-04
- Glossary of Acronyms & Technical Terms (EPA archive) · Source checked 2026-11-04
- Sanitary Sewer Overflows (SSOs) · Source checked 2026-11-04
- Industrial Uses for Fats, Oils, and Grease · Source checked 2026-11-04
- 1910.132 - General requirements (Personal Protective Equipment) · Source checked 2026-11-04
- 1910.147 - The control of hazardous energy (lockout/tagout) · Source checked 2026-11-04
- Subchapter 08G - Water Pollution Control System Operators Certification Commission Rules (2018) · Source checked 2026-11-04
- Biological Wastewater Needs-to-Know, Introduction for Grade 1 & 2 (2019) · Source checked 2026-11-04
- 15A NCAC 18C .0400 - Water Supply Design Criteria (Section .0400) · Source checked 2026-11-04
- Wastewater Operator Certification (NC DEQ) · Source checked 2026-11-04
About the NC Water/Wastewater Operator Exam
North Carolina certifies drinking water operators through the Water Treatment Facility Operators Certification Board in Grades C, B, and A Surface; D, C, B, and A Well; D, C, B, and A Distribution; plus Cross-Connection Control. Wastewater operators are certified by the Water Pollution Control System Operators Certification Commission in Biological Grades I-IV, Collection Systems Grades I-IV, Physical/Chemical Grades I-II, and the land application, surface irrigation, and subsurface types. Drinking water exams are given four times a year at Hickory, Raleigh, and Williamston; wastewater exams four times a year at six locations. A passing score is 70 percent. This practice exam covers NC rules, treatment processes, and operational fundamentals.
Exam sponsor: NC DEQ — Water Treatment Facility Operators Certification Board (drinking water) and Water Pollution Control System Operators Certification Commission (wastewater). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Assessment
Question count varies by exam level
Time Limit
3 hours (drinking water examinations)
Passing Score
70%
Exam / Certification Fees
$50 drinking water exam and certificate; $101 wastewater exam and certificate
Exam sponsor websiteFees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Frequently Asked Questions
Is the NC Water/Wastewater Operator vocabulary game free?
Yes. The game is free to play with no sign-up. Signing in adds AI explanations for any term.
How does the NC Water/Wastewater Operator vocabulary game work?
Each round shows a clue for one of 20 NC Water/Wastewater Operator terms. Guess the term in six tries: green means the right letter in the right spot, yellow means the letter is in the term but in another spot, and gray means it is not in the term. After the round, read the explanation and play the next term.
Where do the NC Water/Wastewater Operator terms come from?
OpenExamPrep researched each term from the NC DEQ — Water Treatment Facility Operators Certification Board (drinking water) and Water Pollution Control System Operators Certification Commission (wastewater) content outline and primary sources, listed under Sources on this page. The game is independent study material, not an official exam resource.
What certification grades does North Carolina offer for drinking water operators?
Under 15A NCAC 18D .0201 the Water Treatment Facility Operators Certification Board issues Grade C, B, and A Surface; Grade D, C, B, and A Well; Grade D, C, B, and A Distribution; and a Cross-Connection Control certification. There is no Grade D-Surface. An Apprentice certificate is available to candidates who complete an approved Grade B, C, D, or cross-connection control school and score at least 70 percent before they have the required experience.
How are North Carolina wastewater certifications structured?
The Water Pollution Control System Operators Certification Commission certifies Biological Grades I through IV, Collection System Grades I through IV, Physical/Chemical Grades I and II, and Land Application of Residuals, Surface Irrigation, and Subsurface operators. Grade I requires only approved training; each higher biological or collection grade requires holding the grade below it plus documented actual experience under 15A NCAC 08G .0402 and .0403.