Page 1 of 104
NEVADA WATER DISTRIBUTION OPERATOR GRADE
III EXAM QUESTIONS AND VERIFIED ANSWERS
WITH RATIONALES JUST RELEASED
NEVADA WATER DISTRIBUTION OPERATOR GRADE III EXAM
10 MOST RELEVANT AND TESTED COVERAGE AREAS
1. Nevada NRS 445A and NAC 445A Operator Certification Requirements
2. Water Distribution System Classification, Grade III Responsibilities, and Responsible Charge
3. Distribution-System Hydraulics, Pressure, Flow, Head, and Pumping
4. Water Mains, Service Lines, Valves, Hydrants, and Appurtenances
5. Storage Tanks, Reservoirs, Water Age, and System Operations
6. Disinfection, Chlorine Residual, CT Concepts, and Distribution-Water Quality
7. Cross-Connection Control, Backflow Prevention, and Contamination Protection
8. Leak Detection, Main Breaks, Repairs, Flushing, and Emergency Response
9. Sampling, Monitoring, Records, Maintenance, Safety, and Regulatory Compliance
10. Advanced Grade III Troubleshooting, Calculations, Instrumentation, and Distribution-System
Management
, Page 2 of 104
Nevada's Drinking Water Operator Certification Program is administered by the Nevada Division of
Environmental Protection (NDEP), and the certification framework is established under NRS 445A.875–
445A.880 and NAC 445A.617–445A.652. (NDEP)
Nevada classifies distribution systems using a point system based primarily on population served, with
additional points for a recycled/reclaimed-water distribution system. Distribution-1 is 5–19 points,
Distribution-2 is 20–30, Distribution-3 is 31–41, and Distribution-4 is 42 or more. (Legal Information
Institute)
QUESTIONS 1–200
1. Which Nevada agency administers the Drinking Water Operator Certification Program?
A. Nevada Division of Environmental Protection
B. Nevada Public Utilities Commission
C. Nevada Department of Transportation
D. Nevada State Contractors Board
Answer: A
Rationale: NDEP administers Nevada's Drinking Water Operator Certification Program through the
Bureau of Safe Drinking Water. The program covers certified operators responsible for public water-
system treatment and distribution. (NDEP)
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2. Which Nevada statutes provide the primary statutory authority for drinking-water operator
certification?
A. NRS 445A.100–445A.200
B. NRS 445A.875–445A.880
C. NRS 486.100–486.200
D. NRS 625A.100–625A.200
Answer: B
Rationale: NRS 445A.875 through 445A.880 establish Nevada's operator-certification framework,
including certification, classification, examinations, fees, and continuing education. (NDEP)
3. Which Nevada Administrative Code range contains the drinking-water operator certification
regulations?
A. NAC 445A.100–445A.200
B. NAC 445A.300–445A.400
C. NAC 445A.617–445A.652
D. NAC 445A.700–445A.800
Answer: C
, Page 4 of 104
Rationale: The current NDEP certification page identifies NAC 445A.617 through NAC 445A.652 as the
applicable administrative regulations for drinking-water operator certification. (NDEP)
4. What is the principal purpose of Nevada's drinking-water operator certification program?
A. Increase water sales
B. Standardize utility billing
C. Regulate plumbing contractors
D. Protect public health and the environment
Answer: D
Rationale: Nevada's program is designed to ensure public water systems are operated by appropriately
trained and certified personnel, supporting protection of public health and the environment. (NDEP)
5. What does the term “responsible charge” most closely describe?
A. Responsibility for system operations and compliance
B. Responsibility for utility accounting
C. Responsibility for chemical purchasing only
D. Responsibility for construction bidding
Answer: A
NEVADA WATER DISTRIBUTION OPERATOR GRADE
III EXAM QUESTIONS AND VERIFIED ANSWERS
WITH RATIONALES JUST RELEASED
NEVADA WATER DISTRIBUTION OPERATOR GRADE III EXAM
10 MOST RELEVANT AND TESTED COVERAGE AREAS
1. Nevada NRS 445A and NAC 445A Operator Certification Requirements
2. Water Distribution System Classification, Grade III Responsibilities, and Responsible Charge
3. Distribution-System Hydraulics, Pressure, Flow, Head, and Pumping
4. Water Mains, Service Lines, Valves, Hydrants, and Appurtenances
5. Storage Tanks, Reservoirs, Water Age, and System Operations
6. Disinfection, Chlorine Residual, CT Concepts, and Distribution-Water Quality
7. Cross-Connection Control, Backflow Prevention, and Contamination Protection
8. Leak Detection, Main Breaks, Repairs, Flushing, and Emergency Response
9. Sampling, Monitoring, Records, Maintenance, Safety, and Regulatory Compliance
10. Advanced Grade III Troubleshooting, Calculations, Instrumentation, and Distribution-System
Management
, Page 2 of 104
Nevada's Drinking Water Operator Certification Program is administered by the Nevada Division of
Environmental Protection (NDEP), and the certification framework is established under NRS 445A.875–
445A.880 and NAC 445A.617–445A.652. (NDEP)
Nevada classifies distribution systems using a point system based primarily on population served, with
additional points for a recycled/reclaimed-water distribution system. Distribution-1 is 5–19 points,
Distribution-2 is 20–30, Distribution-3 is 31–41, and Distribution-4 is 42 or more. (Legal Information
Institute)
QUESTIONS 1–200
1. Which Nevada agency administers the Drinking Water Operator Certification Program?
A. Nevada Division of Environmental Protection
B. Nevada Public Utilities Commission
C. Nevada Department of Transportation
D. Nevada State Contractors Board
Answer: A
Rationale: NDEP administers Nevada's Drinking Water Operator Certification Program through the
Bureau of Safe Drinking Water. The program covers certified operators responsible for public water-
system treatment and distribution. (NDEP)
, Page 3 of 104
2. Which Nevada statutes provide the primary statutory authority for drinking-water operator
certification?
A. NRS 445A.100–445A.200
B. NRS 445A.875–445A.880
C. NRS 486.100–486.200
D. NRS 625A.100–625A.200
Answer: B
Rationale: NRS 445A.875 through 445A.880 establish Nevada's operator-certification framework,
including certification, classification, examinations, fees, and continuing education. (NDEP)
3. Which Nevada Administrative Code range contains the drinking-water operator certification
regulations?
A. NAC 445A.100–445A.200
B. NAC 445A.300–445A.400
C. NAC 445A.617–445A.652
D. NAC 445A.700–445A.800
Answer: C
, Page 4 of 104
Rationale: The current NDEP certification page identifies NAC 445A.617 through NAC 445A.652 as the
applicable administrative regulations for drinking-water operator certification. (NDEP)
4. What is the principal purpose of Nevada's drinking-water operator certification program?
A. Increase water sales
B. Standardize utility billing
C. Regulate plumbing contractors
D. Protect public health and the environment
Answer: D
Rationale: Nevada's program is designed to ensure public water systems are operated by appropriately
trained and certified personnel, supporting protection of public health and the environment. (NDEP)
5. What does the term “responsible charge” most closely describe?
A. Responsibility for system operations and compliance
B. Responsibility for utility accounting
C. Responsibility for chemical purchasing only
D. Responsibility for construction bidding
Answer: A
