100+ Free VA Water/Wastewater Operator Practice Questions

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Which Virginia agency administers waterworks and wastewater works operator licensing?

Virginia Department of Health

Virginia Department of Professional and Occupational Regulation (DPOR)

Virginia Department of Environmental Quality

Virginia Water Authority

to track

2026 Statistics

Key Facts: VA Water/Wastewater Operator Exam

6 Classes

Waterworks Levels

VA DPOR

4 Classes

Wastewater Levels

VA DPOR

2 years

Renewal Cycle

VA DPOR

220 days

1 Year Experience

VA DPOR

PSI

Exam Administrator

VA DPOR

20 CPE

Hours per Cycle (Class I–III)

VA DPOR

Sample VA Water/Wastewater Operator Practice Questions

Try these sample questions to test your VA Water/Wastewater Operator exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which Virginia agency administers waterworks and wastewater works operator licensing?

A.Virginia Department of Health

B.Virginia Department of Professional and Occupational Regulation (DPOR)

C.Virginia Department of Environmental Quality

D.Virginia Water Authority

Explanation: The Virginia DPOR Board for Waterworks and Wastewater Works Operators and Onsite Sewage System Professionals administers operator licensing in Virginia. DPOR sets education, experience, and examination requirements.

2How many classification levels does Virginia have for waterworks operators?

A.Three classes

B.Four classes

C.Five classes

D.Six classes (Class 1–6)

Explanation: Virginia classifies waterworks operators into six classes. A Class 3 operator may operate Class 3–6 waterworks, while a Class 6 operator may only operate Class 6 waterworks. Higher classes cover more complex treatment systems.

3How is one year of waterworks operator experience defined in Virginia?

A.100 days or 800 hours

B.150 days or 1,200 hours

C.220 days or 1,760 hours

D.365 days or 2,920 hours

Explanation: Virginia defines one year of experience as a minimum of 220 days or 1,760 hours of actual work at a public water supply system. The amount of experience needed depends on educational background and specialized training.

4What is the renewal cycle for Virginia wastewater operator certification?

A.Annually

B.Every 2 years

C.Every 3 years

D.Every 5 years

Explanation: Virginia wastewater operator certifications are renewed every 2 years. Class I, II, and III operators need 20 CPE hours per cycle, with Class I and II requiring 5 of those hours in management topics. Class IV operators need 16 CPE hours.

5What type of waterworks can a Virginia Class 6 operator operate?

A.Any waterworks in the state

B.Only the most complex treatment facilities

C.Waterworks serving fewer than 400 persons with no treatment or basic hypochlorination

D.Only industrial water systems

Explanation: A Virginia Class 6 waterworks licensee may operate waterworks serving fewer than 400 persons that provide no treatment or employ basic processes like hypochlorination for disinfection or corrosion control with calcite or magnesium oxide contactors.

6How are Virginia operator licensing exams administered?

A.Paper-based exams held twice yearly

B.Computerized exams proctored by PSI available throughout the year

C.Take-home open-book exams

D.Oral examinations only

Explanation: Virginia DPOR contracted with PSI to proctor operator exams in a computerized format. Exams can be scheduled throughout the year at various PSI testing center locations across the state.

7How many CPE hours in management are required for Virginia Class I and II wastewater operators per renewal cycle?

A.0 hours

B.3 hours

C.5 hours

D.10 hours

Explanation: Virginia requires Class I and II wastewater operators to complete 5 CPE hours in management topics out of their total 20 CPE hours each 2-year renewal cycle. This ensures senior operators maintain management competencies.

8What is the primary purpose of coagulation in water treatment?

A.To kill bacteria

B.To destabilize and aggregate suspended particles for removal

C.To remove dissolved gases

D.To adjust pH to neutral

Explanation: Coagulation uses chemicals (alum, ferric chloride) to neutralize particle charges, allowing them to clump together. This is the first step in the conventional treatment process for turbidity removal.

9What does the CT value represent in disinfection?

A.Cost of treatment per gallon

B.Product of disinfectant concentration (mg/L) and contact time (minutes)

C.Chemical treatment formula for pH

D.Chlorine total at the tap

Explanation: CT = Concentration × Time. Regulatory agencies require minimum CT values to ensure adequate inactivation of pathogens like Giardia and viruses. Higher CT provides greater disinfection.

10What is breakpoint chlorination?

A.The point where equipment fails

B.Adding enough chlorine to oxidize all ammonia and produce a free chlorine residual

C.The maximum permitted chlorine level

D.The point where chlorine forms ice

Explanation: Breakpoint chlorination adds sufficient chlorine to satisfy demand, react with ammonia (forming chloramines then nitrogen gas), until a free chlorine residual appears. Beyond the breakpoint, each additional unit of chlorine directly increases free residual.

About the VA Water/Wastewater Operator Exam

Virginia certifies waterworks operators in six classes (Class 1–6) and wastewater operators in four classes (Class I–IV). Exams are PSI-proctored, computerized, and available year-round. The next renewal cycle is 2026 with 20 CPE hours required for Class I–III and 16 for Class IV.

Questions

100 scored questions

Time Limit

Varies by class level

Passing Score

70%

Exam Fee

Varies; PSI-proctored computerized exam (Virginia Department of Professional and Occupational Regulation (DPOR))

VA Water/Wastewater Operator Exam Content Outline

20%

State Laws & Licensing

Virginia DPOR certification, Class 1–6 waterworks, Class I–IV wastewater, PSI exams, 2-year renewal, and CPE requirements

20%

Water Treatment

Coagulation, flocculation, sedimentation, filtration, disinfection, CT values, and source water protection

20%

Wastewater Treatment

Activated sludge, BOD removal, sludge handling, nitrification/denitrification, and effluent disinfection

20%

Distribution & Collection

Pump operations, hydraulics, cross-connection control, collection system maintenance, and I&I reduction

20%

Laboratory & Safety

Water quality testing, sampling, math calculations, confined space, LOTO, and chemical safety

How to Pass the VA Water/Wastewater Operator Exam

What You Need to Know

Passing score: 70%
Exam length: 100 questions
Time limit: Varies by class level
Exam fee: Varies; PSI-proctored computerized exam

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

VA Water/Wastewater Operator Study Tips from Top Performers

1Master Virginia's six waterworks classes and four wastewater classes with their specific system size/treatment requirements

2Know that one year of VA experience = 220 days or 1,760 hours

3Study the 2026 CPE requirements: 20 hrs for Class I–III (5 in management for I–II), 16 hrs for Class IV

4Understand Virginia's DPOR vs. DEQ vs. VDH roles in operator licensing and facility regulation

5Practice water math: pounds formula, detention time, flow conversions, and percent removal

Frequently Asked Questions

How many waterworks operator classes does Virginia have?

Six classes (1–6). Class 3 operators can operate Class 3–6 waterworks, while Class 6 is restricted to small systems (<400 persons) with basic treatment.

How are Virginia exams administered?

Computerized exams proctored by PSI, available throughout the year at various locations across Virginia.

What are the CPE requirements for 2026 renewal?

Class I–III wastewater: 20 CPE hours per 2-year cycle (Class I–II need 5 in management). Class IV: 16 CPE hours.

How is one year of experience defined?

A minimum of 220 days or 1,760 hours of actual work at a public water supply system.