Virginia Wastewater Operator Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1.
Which of the following best describes the primary regulatory authority
responsible for licensing wastewater treatment plant operators in Virginia?
A. Virginia Department of Environmental Quality (DEQ)
B. Virginia Department of Health (VDH)
C. Board for Waterworks and Wastewater Works Operators within DPOR
D. Environmental Protection Agency (EPA)
Correct Answer: C
The Board for Waterworks and Wastewater Works Operators, which
operates under the Virginia Department of Professional and Occupational
Regulation (DPOR), is the authority responsible for issuing wastewater
operator licenses, establishing classifications, and regulating licensure
requirements in the state.
2.
A wastewater operator in Virginia is legally defined as an individual whose
duties primarily include which of the following activities?
,A. Office administration and payroll processing for utility departments
B. Direct operation, monitoring, testing, or control of wastewater treatment
systems
C. Engineering design of municipal treatment facilities only
D. Construction contracting for pipeline installation projects
Correct Answer: B
Virginia law defines an operator as an individual responsible for the actual
operation, monitoring, testing, and control of waterworks or wastewater
systems, including supervisory or shift responsibilities related to plant
performance.
3.
Which treatment stage primarily focuses on removing organic matter
through biological processes?
A. Preliminary treatment
B. Primary treatment
C. Secondary treatment
D. Disinfection
Correct Answer: C
Secondary treatment uses biological processes, such as activated sludge
systems, to remove dissolved and suspended organic matter after primary
settling has removed heavier solids.
4.
What is the main purpose of preliminary wastewater treatment?
A. Removal of nutrients such as nitrogen and phosphorus
B. Disinfection of pathogens using chlorine or UV
C. Removal of large debris that may damage equipment
D. Stabilization of sludge for disposal
,Correct Answer: C
Preliminary treatment is designed to remove large solids and debris, such
as rags and grit, that could damage pumps, pipes, and other mechanical
equipment in the treatment system.
5.
In Virginia wastewater systems, what is the primary purpose of disinfection?
A. Removal of settleable solids
B. Destruction of disease-causing organisms
C. Conversion of sludge into biosolids
D. Reduction of biochemical oxygen demand (BOD)
Correct Answer: B
Disinfection is used to eliminate or significantly reduce pathogenic
microorganisms in treated effluent before it is discharged into the
environment.
6.
Which classification best describes a wastewater treatment plant based on
Virginia regulations?
A. Based solely on operator experience level
B. Based on geographic location and population density
C. Based on plant complexity and treatment capacity
D. Based on operator salary scale
Correct Answer: C
Wastewater treatment plants are classified according to their design flow,
complexity, and treatment processes, which determines the operator
license level required.
7.
Which entity administers wastewater operator licensing in Virginia?
, A. Virginia Department of Transportation
B. DPOR Board for Waterworks and Wastewater Works Operators
C. U.S. Army Corps of Engineers
D. Virginia Environmental Training Institute
Correct Answer: B
The Board for Waterworks and Wastewater Works Operators under DPOR
is responsible for licensing, examination oversight, and regulatory
enforcement for operators.
8.
Which of the following is required before serving as an operator in charge of
a wastewater treatment facility in Virginia?
A. A college degree in environmental science
B. A valid license appropriate to the facility classification
C. Employment by a private engineering firm
D. Certification from the EPA only
Correct Answer: B
Virginia law requires operators to hold a valid license equal to or higher
than the classification of the facility where they work in responsible
charge.
9.
Which treatment process follows primary treatment in a conventional
wastewater system?
A. Advanced filtration
B. Secondary biological treatment
C. Sludge incineration
D. Chemical storage
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1.
Which of the following best describes the primary regulatory authority
responsible for licensing wastewater treatment plant operators in Virginia?
A. Virginia Department of Environmental Quality (DEQ)
B. Virginia Department of Health (VDH)
C. Board for Waterworks and Wastewater Works Operators within DPOR
D. Environmental Protection Agency (EPA)
Correct Answer: C
The Board for Waterworks and Wastewater Works Operators, which
operates under the Virginia Department of Professional and Occupational
Regulation (DPOR), is the authority responsible for issuing wastewater
operator licenses, establishing classifications, and regulating licensure
requirements in the state.
2.
A wastewater operator in Virginia is legally defined as an individual whose
duties primarily include which of the following activities?
,A. Office administration and payroll processing for utility departments
B. Direct operation, monitoring, testing, or control of wastewater treatment
systems
C. Engineering design of municipal treatment facilities only
D. Construction contracting for pipeline installation projects
Correct Answer: B
Virginia law defines an operator as an individual responsible for the actual
operation, monitoring, testing, and control of waterworks or wastewater
systems, including supervisory or shift responsibilities related to plant
performance.
3.
Which treatment stage primarily focuses on removing organic matter
through biological processes?
A. Preliminary treatment
B. Primary treatment
C. Secondary treatment
D. Disinfection
Correct Answer: C
Secondary treatment uses biological processes, such as activated sludge
systems, to remove dissolved and suspended organic matter after primary
settling has removed heavier solids.
4.
What is the main purpose of preliminary wastewater treatment?
A. Removal of nutrients such as nitrogen and phosphorus
B. Disinfection of pathogens using chlorine or UV
C. Removal of large debris that may damage equipment
D. Stabilization of sludge for disposal
,Correct Answer: C
Preliminary treatment is designed to remove large solids and debris, such
as rags and grit, that could damage pumps, pipes, and other mechanical
equipment in the treatment system.
5.
In Virginia wastewater systems, what is the primary purpose of disinfection?
A. Removal of settleable solids
B. Destruction of disease-causing organisms
C. Conversion of sludge into biosolids
D. Reduction of biochemical oxygen demand (BOD)
Correct Answer: B
Disinfection is used to eliminate or significantly reduce pathogenic
microorganisms in treated effluent before it is discharged into the
environment.
6.
Which classification best describes a wastewater treatment plant based on
Virginia regulations?
A. Based solely on operator experience level
B. Based on geographic location and population density
C. Based on plant complexity and treatment capacity
D. Based on operator salary scale
Correct Answer: C
Wastewater treatment plants are classified according to their design flow,
complexity, and treatment processes, which determines the operator
license level required.
7.
Which entity administers wastewater operator licensing in Virginia?
, A. Virginia Department of Transportation
B. DPOR Board for Waterworks and Wastewater Works Operators
C. U.S. Army Corps of Engineers
D. Virginia Environmental Training Institute
Correct Answer: B
The Board for Waterworks and Wastewater Works Operators under DPOR
is responsible for licensing, examination oversight, and regulatory
enforcement for operators.
8.
Which of the following is required before serving as an operator in charge of
a wastewater treatment facility in Virginia?
A. A college degree in environmental science
B. A valid license appropriate to the facility classification
C. Employment by a private engineering firm
D. Certification from the EPA only
Correct Answer: B
Virginia law requires operators to hold a valid license equal to or higher
than the classification of the facility where they work in responsible
charge.
9.
Which treatment process follows primary treatment in a conventional
wastewater system?
A. Advanced filtration
B. Secondary biological treatment
C. Sludge incineration
D. Chemical storage
