Page 1 of 112
Virginia Waterworks Operator Class 2 License
Exam QUESTIONS AND CORRECT ANSWERS WITH
RATIONALES
Virginia Waterworks Operator Class 2 License Exam
10 Point-Form Exam Coverage Areas
1. Licensing Requirements & Regulations – Eligibility pathways, classification criteria, application
process, exam retake rules, and Virginia-specific DPOR regulations.
2. Water Treatment Processes – Conventional treatment: coagulation, flocculation,
sedimentation, filtration, disinfection. Process optimization and troubleshooting.
3. Chemical Feed Systems – Chemical storage and handling, feed rate calculations, polymer and
coagulant optimization (jar testing), anti-siphon valves, safety data sheets.
4. Distribution System Operations – Water quality monitoring in distribution, pressure
management, flushing programs, storage tanks, and fire flow testing.
5. Water Quality Monitoring – Turbidity, pH, chlorine residual, coliform bacteria sampling, lead
and copper sampling (first-draw protocols), and regulatory reporting.
6. Safety & Emergency Preparedness – Confined space entry, chlorine safety (respirators, leak
detection), Lockout/Tagout (LOTO), trenching/excavation safety, Emergency Response Plans.
7. Instrumentation & Control (SCADA) – PLCs, sensors, automation, remote monitoring, and
troubleshooting SCADA systems.
8. Regulatory Compliance – Safe Drinking Water Act (SDWA), EPA regulations (MCLs), Disinfection
Byproducts (THMs, HAAs), Lead and Copper Rule (action levels), and Virginia Department of
Health (VDH) requirements.
9. Filtration & Backwashing – Rapid sand filter operation, head loss management, media
stratification, backwashing cycles (10-30% media expansion).
10. Sedimentation & Clarification – Floc settling, sludge removal, surface overflow rate (SOR),
short-circuiting detection, circular clarifier operation.
Practice Questions with Answers & Rationales
SECTION 1: LICENSING REQUIREMENTS & REGULATIONS
, Page 2 of 112
QUESTION 1
Which Virginia agency is responsible for issuing waterworks operator licenses?
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 Commerce
Answer: C – DPOR oversees waterworks operator licensure in Virginia. VDH collaborates with DPOR on
training and examinations, but DPOR issues the licenses.
QUESTION 2
Which federal law is the primary authority for drinking water safety in the United States?
A) Clean Water Act
B) Safe Drinking Water Act (SDWA)
C) Resource Conservation and Recovery Act
D) Clean Air Act
Answer: B – The Safe Drinking Water Act (SDWA) is the primary federal law ensuring the safety of public
drinking water supplies. The EPA sets national primary drinking water standards under this act.
, Page 3 of 112
QUESTION 3
What is the classification criteria for a Virginia Class 2 waterworks?
A) Serving 50,000 or more persons
B) Serving 5,000 or more but fewer than 50,000 persons, or having a treatment capacity of 0.5 MGD or
more but less than 5.0 MGD
C) Serving fewer than 500 persons
D) Serving 1,000 to 5,000 persons
Answer: B – Virginia classifies waterworks based on potential health risks, population served, source,
and complexity. A Class 2 waterworks serves 5,000 or more persons but fewer than 50,000 persons or
has a treatment plant capacity of 0.5 MGD or more but less than 5.0 MGD.
QUESTION 4
What is the minimum passing score for the Class 2 Waterworks Operator examination?
A) 42 correct out of 60
B) 45 correct out of 60
C) 52 correct out of 70
D) 56 correct out of 75
Answer: C – The Class 2 exam contains 70 questions, and a passing score is 52 correct answers (74%).
, Page 4 of 112
QUESTION 5
How many years of experience are typically required for a Class 2 license applicant with a bachelor's
degree?
A) 1 year
B) 1.5 years
C) 2 years
D) 3 years
Answer: B – A Class II license applicant with a bachelor's degree requires at least 1.5 years of
experience, of which at least six months (without substitutions) must be as an operator-in-training in a
Class III, Class II, or Class I waterworks.
QUESTION 6
How many CPE (Continuing Professional Education) hours are required annually for a Class 2 operator?
A) 12 hours
B) 20 hours
C) 24 hours
Virginia Waterworks Operator Class 2 License
Exam QUESTIONS AND CORRECT ANSWERS WITH
RATIONALES
Virginia Waterworks Operator Class 2 License Exam
10 Point-Form Exam Coverage Areas
1. Licensing Requirements & Regulations – Eligibility pathways, classification criteria, application
process, exam retake rules, and Virginia-specific DPOR regulations.
2. Water Treatment Processes – Conventional treatment: coagulation, flocculation,
sedimentation, filtration, disinfection. Process optimization and troubleshooting.
3. Chemical Feed Systems – Chemical storage and handling, feed rate calculations, polymer and
coagulant optimization (jar testing), anti-siphon valves, safety data sheets.
4. Distribution System Operations – Water quality monitoring in distribution, pressure
management, flushing programs, storage tanks, and fire flow testing.
5. Water Quality Monitoring – Turbidity, pH, chlorine residual, coliform bacteria sampling, lead
and copper sampling (first-draw protocols), and regulatory reporting.
6. Safety & Emergency Preparedness – Confined space entry, chlorine safety (respirators, leak
detection), Lockout/Tagout (LOTO), trenching/excavation safety, Emergency Response Plans.
7. Instrumentation & Control (SCADA) – PLCs, sensors, automation, remote monitoring, and
troubleshooting SCADA systems.
8. Regulatory Compliance – Safe Drinking Water Act (SDWA), EPA regulations (MCLs), Disinfection
Byproducts (THMs, HAAs), Lead and Copper Rule (action levels), and Virginia Department of
Health (VDH) requirements.
9. Filtration & Backwashing – Rapid sand filter operation, head loss management, media
stratification, backwashing cycles (10-30% media expansion).
10. Sedimentation & Clarification – Floc settling, sludge removal, surface overflow rate (SOR),
short-circuiting detection, circular clarifier operation.
Practice Questions with Answers & Rationales
SECTION 1: LICENSING REQUIREMENTS & REGULATIONS
, Page 2 of 112
QUESTION 1
Which Virginia agency is responsible for issuing waterworks operator licenses?
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 Commerce
Answer: C – DPOR oversees waterworks operator licensure in Virginia. VDH collaborates with DPOR on
training and examinations, but DPOR issues the licenses.
QUESTION 2
Which federal law is the primary authority for drinking water safety in the United States?
A) Clean Water Act
B) Safe Drinking Water Act (SDWA)
C) Resource Conservation and Recovery Act
D) Clean Air Act
Answer: B – The Safe Drinking Water Act (SDWA) is the primary federal law ensuring the safety of public
drinking water supplies. The EPA sets national primary drinking water standards under this act.
, Page 3 of 112
QUESTION 3
What is the classification criteria for a Virginia Class 2 waterworks?
A) Serving 50,000 or more persons
B) Serving 5,000 or more but fewer than 50,000 persons, or having a treatment capacity of 0.5 MGD or
more but less than 5.0 MGD
C) Serving fewer than 500 persons
D) Serving 1,000 to 5,000 persons
Answer: B – Virginia classifies waterworks based on potential health risks, population served, source,
and complexity. A Class 2 waterworks serves 5,000 or more persons but fewer than 50,000 persons or
has a treatment plant capacity of 0.5 MGD or more but less than 5.0 MGD.
QUESTION 4
What is the minimum passing score for the Class 2 Waterworks Operator examination?
A) 42 correct out of 60
B) 45 correct out of 60
C) 52 correct out of 70
D) 56 correct out of 75
Answer: C – The Class 2 exam contains 70 questions, and a passing score is 52 correct answers (74%).
, Page 4 of 112
QUESTION 5
How many years of experience are typically required for a Class 2 license applicant with a bachelor's
degree?
A) 1 year
B) 1.5 years
C) 2 years
D) 3 years
Answer: B – A Class II license applicant with a bachelor's degree requires at least 1.5 years of
experience, of which at least six months (without substitutions) must be as an operator-in-training in a
Class III, Class II, or Class I waterworks.
QUESTION 6
How many CPE (Continuing Professional Education) hours are required annually for a Class 2 operator?
A) 12 hours
B) 20 hours
C) 24 hours
