VIRGINIA WATERWORKS OPERATOR CERTIFICATION EXAM
COMPLETE EXAM QUESTIONS AND VERIFIED ANSWERS |
2026–2027 LATEST UPDATE | GUARANTEED PASS | DETAILED
RATIONALES | FULL STUDY GUIDE | EXAM PREP | PRACTICE
TEST | CERTIFICATION PREPARATION
1. According to the Virginia Administrative Code (18VAC160-30-110), what is the minimum
education requirement to qualify for the Class 5 Waterworks Operator examination?
A. Completion of a state-approved apprenticeship program
B. High school diploma or equivalent (GED)
C. Associate's degree in a related science field
D. No formal education is required for this class
Correct Answer: B. High school diploma or equivalent (GED)
Rationale: The Virginia Administrative Code explicitly requires a high school diploma or its equivalent
(GED) for Class 5 licensure. Formal education beyond high school is not mandatory for this class,
though substitutions may affect experience requirements .
2. If a Class 5 Waterworks Operator applicant does not possess a high school diploma or GED, how
much minimum experience is required?
A. 3 months
B. 6 months
C. 9 months
D. 12 months
Correct Answer: B. 6 months
Rationale: Virginia regulations establish that without a high school diploma or equivalent, the
required minimum experience for Class 5 doubles from 3 months to 6 months at a Class 5 or higher
facility. The diploma reduces the required experience by half compared to those without formal
educational credentials .
3. The Virginia Board for Waterworks and Wastewater Works Operators and Onsite Sewage System
Professionals falls under which state agency?
A. Virginia Department of Health (VDH)
B. Virginia Department of Environmental Quality (DEQ)
C. Department of Professional and Occupational Regulation (DPOR)
D. Virginia Department of Housing and Community Development
Correct Answer: C. Department of Professional and Occupational Regulation (DPOR)
,Rationale: The Board operates under the Department of Professional and Occupational Regulation
(DPOR), which oversees professional licensing in Virginia. While VDH and DEQ have regulatory roles
in water quality, they are not the licensing authority for operators .
4. According to 18VAC160-30-110, what type of experience may be counted toward Class 5
Waterworks Operator licensure?
A. Any experience in a water-related laboratory setting
B. Experience operating and maintaining the specific type of waterworks facility for which a license is
sought
C. General construction experience on water infrastructure projects
D. Administrative experience at a water utility
Correct Answer: B. Experience operating and maintaining the specific type of waterworks facility
for which a license is sought
Rationale: Virginia regulations specify that qualifying experience must involve "the operation and
maintenance of the specific type of waterworks facility for which a license is sought." Ancillary or
unrelated experience does not satisfy the requirement, even if it is tangentially related to the water
industry .
5. How often must a Virginia Waterworks Operator license be renewed?
A. Annually
B. Every two years (biennially)
C. Every three years
D. Every five years
Correct Answer: B. Every two years (biennially)
Rationale: Waterworks operator licenses in Virginia expire on the last day of February of each odd-
numbered year, requiring biennial renewal. Wastewater licenses follow a similar biennial schedule
but expire in even-numbered years .
6. How many continuing education (CE) contact hours are required for Class 5 Waterworks
Operator license renewal?
A. 4 hours
B. 8 hours
C. 12 hours
D. 16 hours
Correct Answer: B. 8 hours
Rationale: Virginia requires 8 continuing education contact hours for Class 5 license renewal,
consistent with the biennial renewal cycle. Higher classes typically require more CE hours, while lower
classes may require fewer .
, 7. Under 12VAC5-590-461, what defines a Class 5 waterworks facility?
A. Serves 100 persons or more with advanced treatment processes
B. Serves 400 or more persons with no treatment or specific basic treatment processes only
C. Serves 1,000 persons or more with full conventional treatment
D. Serves fewer than 50 persons with chlorination only
Correct Answer: B. Serves 400 or more persons with no treatment or specific basic treatment
processes only
Rationale: A Class 5 waterworks serves 400 or more persons and provides no treatment OR employs
only hypochlorination, corrosion control with calcite/magnesium oxide, or sequestration. This
classification is critical for operators to understand their facility's regulatory requirements .
8. What is the required minimum operator attendance frequency for a Class 5 waterworks that
provides no treatment?
A. Daily attendance
B. At least once per week
C. Twice per month
D. Once per month
Correct Answer: A. Daily attendance
Rationale: Virginia regulations require daily attendance for Class 5 waterworks that provide no
treatment. This ensures regular operational checks and water quality monitoring, even at systems
with minimal treatment components .
9. Which of the following treatment processes is considered acceptable for a Class 5 waterworks
under Virginia regulations?
A. Conventional filtration with coagulation and sedimentation
B. Membrane filtration with reverse osmosis
C. Hypochlorination only
D. Ozonation with granular activated carbon filtration
Correct Answer: C. Hypochlorination only
Rationale: Class 5 waterworks are limited to basic treatment processes: no treatment,
hypochlorination, corrosion control with calcite/magnesium oxide, or sequestration. More advanced
processes such as conventional filtration, membrane systems, or ozonation require higher operator
classifications .
10. A waterworks operator observes a chlorine residual drop below the minimum required level at
a remote sampling station. Which action should the operator take first?
A. Immediately increase the chlorine feed rate at the treatment plant
B. Notify all customers in the affected area of a potential health risk
COMPLETE EXAM QUESTIONS AND VERIFIED ANSWERS |
2026–2027 LATEST UPDATE | GUARANTEED PASS | DETAILED
RATIONALES | FULL STUDY GUIDE | EXAM PREP | PRACTICE
TEST | CERTIFICATION PREPARATION
1. According to the Virginia Administrative Code (18VAC160-30-110), what is the minimum
education requirement to qualify for the Class 5 Waterworks Operator examination?
A. Completion of a state-approved apprenticeship program
B. High school diploma or equivalent (GED)
C. Associate's degree in a related science field
D. No formal education is required for this class
Correct Answer: B. High school diploma or equivalent (GED)
Rationale: The Virginia Administrative Code explicitly requires a high school diploma or its equivalent
(GED) for Class 5 licensure. Formal education beyond high school is not mandatory for this class,
though substitutions may affect experience requirements .
2. If a Class 5 Waterworks Operator applicant does not possess a high school diploma or GED, how
much minimum experience is required?
A. 3 months
B. 6 months
C. 9 months
D. 12 months
Correct Answer: B. 6 months
Rationale: Virginia regulations establish that without a high school diploma or equivalent, the
required minimum experience for Class 5 doubles from 3 months to 6 months at a Class 5 or higher
facility. The diploma reduces the required experience by half compared to those without formal
educational credentials .
3. The Virginia Board for Waterworks and Wastewater Works Operators and Onsite Sewage System
Professionals falls under which state agency?
A. Virginia Department of Health (VDH)
B. Virginia Department of Environmental Quality (DEQ)
C. Department of Professional and Occupational Regulation (DPOR)
D. Virginia Department of Housing and Community Development
Correct Answer: C. Department of Professional and Occupational Regulation (DPOR)
,Rationale: The Board operates under the Department of Professional and Occupational Regulation
(DPOR), which oversees professional licensing in Virginia. While VDH and DEQ have regulatory roles
in water quality, they are not the licensing authority for operators .
4. According to 18VAC160-30-110, what type of experience may be counted toward Class 5
Waterworks Operator licensure?
A. Any experience in a water-related laboratory setting
B. Experience operating and maintaining the specific type of waterworks facility for which a license is
sought
C. General construction experience on water infrastructure projects
D. Administrative experience at a water utility
Correct Answer: B. Experience operating and maintaining the specific type of waterworks facility
for which a license is sought
Rationale: Virginia regulations specify that qualifying experience must involve "the operation and
maintenance of the specific type of waterworks facility for which a license is sought." Ancillary or
unrelated experience does not satisfy the requirement, even if it is tangentially related to the water
industry .
5. How often must a Virginia Waterworks Operator license be renewed?
A. Annually
B. Every two years (biennially)
C. Every three years
D. Every five years
Correct Answer: B. Every two years (biennially)
Rationale: Waterworks operator licenses in Virginia expire on the last day of February of each odd-
numbered year, requiring biennial renewal. Wastewater licenses follow a similar biennial schedule
but expire in even-numbered years .
6. How many continuing education (CE) contact hours are required for Class 5 Waterworks
Operator license renewal?
A. 4 hours
B. 8 hours
C. 12 hours
D. 16 hours
Correct Answer: B. 8 hours
Rationale: Virginia requires 8 continuing education contact hours for Class 5 license renewal,
consistent with the biennial renewal cycle. Higher classes typically require more CE hours, while lower
classes may require fewer .
, 7. Under 12VAC5-590-461, what defines a Class 5 waterworks facility?
A. Serves 100 persons or more with advanced treatment processes
B. Serves 400 or more persons with no treatment or specific basic treatment processes only
C. Serves 1,000 persons or more with full conventional treatment
D. Serves fewer than 50 persons with chlorination only
Correct Answer: B. Serves 400 or more persons with no treatment or specific basic treatment
processes only
Rationale: A Class 5 waterworks serves 400 or more persons and provides no treatment OR employs
only hypochlorination, corrosion control with calcite/magnesium oxide, or sequestration. This
classification is critical for operators to understand their facility's regulatory requirements .
8. What is the required minimum operator attendance frequency for a Class 5 waterworks that
provides no treatment?
A. Daily attendance
B. At least once per week
C. Twice per month
D. Once per month
Correct Answer: A. Daily attendance
Rationale: Virginia regulations require daily attendance for Class 5 waterworks that provide no
treatment. This ensures regular operational checks and water quality monitoring, even at systems
with minimal treatment components .
9. Which of the following treatment processes is considered acceptable for a Class 5 waterworks
under Virginia regulations?
A. Conventional filtration with coagulation and sedimentation
B. Membrane filtration with reverse osmosis
C. Hypochlorination only
D. Ozonation with granular activated carbon filtration
Correct Answer: C. Hypochlorination only
Rationale: Class 5 waterworks are limited to basic treatment processes: no treatment,
hypochlorination, corrosion control with calcite/magnesium oxide, or sequestration. More advanced
processes such as conventional filtration, membrane systems, or ozonation require higher operator
classifications .
10. A waterworks operator observes a chlorine residual drop below the minimum required level at
a remote sampling station. Which action should the operator take first?
A. Immediately increase the chlorine feed rate at the treatment plant
B. Notify all customers in the affected area of a potential health risk
