NEVADA (NV) C-23 DRILLING WELLS PRACTICE TEST EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A | LATEST EXAM UPDATE 2026/2027.
Core Domains
Regulatory Framework and Licensing (NRS 534, NRS 624, NAC 534, NAC 624)
Well Construction Standards and Materials
Drilling Methods and Equipment
Pump Installation and Systems
Hydrology and Groundwater Principles
Environmental Compliance and Setback Requirements
Safety and OSHA Regulations
This comprehensive practice examination is designed to assess the knowledge and skills required for the Nevada
C-23 Drilling Wells contractor license. The exam covers foundational theory, applied professional knowledge,
regulatory and legal compliance, ethics, and professional standards. It emphasizes real-world application and
decision-making through a combination of multiple-choice and scenario-based questions. Candidates are
evaluated on their understanding of well construction, drilling methods, pump systems, and Nevada's specific
water resource regulations. This practice test is structured to mirror the official exam, ensuring thorough
preparation for all key subject areas.
SECTION ONE: QUESTIONS 1–100
,Question 1
Which Nevada agency is primarily responsible for regulating groundwater use and issuing permits for drilling
new wells?
A. Nevada State Contractors Board (NSCB)
B. Nevada Division of Water Resources (NDWR)
C. Nevada Division of Environmental Protection (NDEP)
D. Nevada Department of Transportation (NDOT)
🟢B
🔴 RATIONALE: The Nevada Division of Water Resources (NDWR) regulates groundwater use, issues permits for
drilling new wells, and enforces NAC 534 well construction standards. The State Contractors Board issues the C-
23 license, but NDWR issues the well drilling permit.
Question 2
According to NAC 624.400, what is the specific scope of work for a C-23 Drilling Wells license?
A. Drilling for oil and gas resources only
B. Drilling wells and installing pumps, pressure tanks, and storage tanks considered integral to water wells
C. Installing geothermal HVAC systems for residential and commercial buildings
D. Excavating foundations and performing general earthwork for construction projects
🟢B
🔴 RATIONALE: NAC 624.400 specifies that a C-23 license is for drilling wells and installing pumps, pressure
tanks, and storage tanks considered integral to water wells. The license authorizes qualified contractors to drill,
,construct, repair, and rehabilitate water wells, and to install pumps, pressure tanks, and storage tanks integral to
water well systems.
Question 3
What is the minimum passing score required on the written portion of the Nevada well driller licensing exam?
A. 65%
B. 70%
C. 75%
D. 80%
🟢B
🔴 RATIONALE: A score of at least 70% is required to pass the written portion of the Nevada well driller
licensing exam.
Question 4
Which Nevada statute governs the issuance and scope of the C-23 Drilling Wells license?
A. NRS 534 (Underground Water)
B. NRS 624 (Contractors)
C. NRS 533 (Water Rights)
D. NRS 445 (Environmental Health)
🟢B
🔴 RATIONALE: NRS 624 specifically governs the issuance, scope, and limitations of the C-23 Drilling Wells
license. NRS 534 covers well construction and water rights.
, Question 5
How often must a C-23 well driller's license be renewed in Nevada?
A. Annually
B. Every two years
C. Every three years
D. Every five years
🟢B
🔴 RATIONALE: Nevada requires biennial renewal of the C-23 license to ensure continued competency and
compliance. The annual license renewal fee is $50 per NAC 534, making the biennial fee $100.
Question 6
Before any ground disturbance, a "Notice of Intent" (NOI) must be filed with which Nevada agency?
A. Nevada Department of Conservation and Natural Resources
B. State Engineer, Division of Water Resources
C. Nevada Department of Health and Human Services
D. Nevada Department of Transportation
🟢B
🔴 RATIONALE: The State Engineer's Office, through the Division of Water Resources, oversees water resource
permits and requires an NOI prior to drilling.
Question 7
What is the minimum distance required between a new domestic well and a septic tank absorption field in
Nevada?
ANSWERS) PLUS RATIONALES 2026 Q&A | LATEST EXAM UPDATE 2026/2027.
Core Domains
Regulatory Framework and Licensing (NRS 534, NRS 624, NAC 534, NAC 624)
Well Construction Standards and Materials
Drilling Methods and Equipment
Pump Installation and Systems
Hydrology and Groundwater Principles
Environmental Compliance and Setback Requirements
Safety and OSHA Regulations
This comprehensive practice examination is designed to assess the knowledge and skills required for the Nevada
C-23 Drilling Wells contractor license. The exam covers foundational theory, applied professional knowledge,
regulatory and legal compliance, ethics, and professional standards. It emphasizes real-world application and
decision-making through a combination of multiple-choice and scenario-based questions. Candidates are
evaluated on their understanding of well construction, drilling methods, pump systems, and Nevada's specific
water resource regulations. This practice test is structured to mirror the official exam, ensuring thorough
preparation for all key subject areas.
SECTION ONE: QUESTIONS 1–100
,Question 1
Which Nevada agency is primarily responsible for regulating groundwater use and issuing permits for drilling
new wells?
A. Nevada State Contractors Board (NSCB)
B. Nevada Division of Water Resources (NDWR)
C. Nevada Division of Environmental Protection (NDEP)
D. Nevada Department of Transportation (NDOT)
🟢B
🔴 RATIONALE: The Nevada Division of Water Resources (NDWR) regulates groundwater use, issues permits for
drilling new wells, and enforces NAC 534 well construction standards. The State Contractors Board issues the C-
23 license, but NDWR issues the well drilling permit.
Question 2
According to NAC 624.400, what is the specific scope of work for a C-23 Drilling Wells license?
A. Drilling for oil and gas resources only
B. Drilling wells and installing pumps, pressure tanks, and storage tanks considered integral to water wells
C. Installing geothermal HVAC systems for residential and commercial buildings
D. Excavating foundations and performing general earthwork for construction projects
🟢B
🔴 RATIONALE: NAC 624.400 specifies that a C-23 license is for drilling wells and installing pumps, pressure
tanks, and storage tanks considered integral to water wells. The license authorizes qualified contractors to drill,
,construct, repair, and rehabilitate water wells, and to install pumps, pressure tanks, and storage tanks integral to
water well systems.
Question 3
What is the minimum passing score required on the written portion of the Nevada well driller licensing exam?
A. 65%
B. 70%
C. 75%
D. 80%
🟢B
🔴 RATIONALE: A score of at least 70% is required to pass the written portion of the Nevada well driller
licensing exam.
Question 4
Which Nevada statute governs the issuance and scope of the C-23 Drilling Wells license?
A. NRS 534 (Underground Water)
B. NRS 624 (Contractors)
C. NRS 533 (Water Rights)
D. NRS 445 (Environmental Health)
🟢B
🔴 RATIONALE: NRS 624 specifically governs the issuance, scope, and limitations of the C-23 Drilling Wells
license. NRS 534 covers well construction and water rights.
, Question 5
How often must a C-23 well driller's license be renewed in Nevada?
A. Annually
B. Every two years
C. Every three years
D. Every five years
🟢B
🔴 RATIONALE: Nevada requires biennial renewal of the C-23 license to ensure continued competency and
compliance. The annual license renewal fee is $50 per NAC 534, making the biennial fee $100.
Question 6
Before any ground disturbance, a "Notice of Intent" (NOI) must be filed with which Nevada agency?
A. Nevada Department of Conservation and Natural Resources
B. State Engineer, Division of Water Resources
C. Nevada Department of Health and Human Services
D. Nevada Department of Transportation
🟢B
🔴 RATIONALE: The State Engineer's Office, through the Division of Water Resources, oversees water resource
permits and requires an NOI prior to drilling.
Question 7
What is the minimum distance required between a new domestic well and a septic tank absorption field in
Nevada?
