NV C-23 Drilling Wells Contractor Exam — Complete Practice Test Bank
EXAM OVERVIEW
| Category | Details |
|---|---|
| Exam Title | Nevada C-23 Drilling Wells Contractor Examination |
| Issuing Authority | Nevada State Contractors Board (NSCB) |
| Governing Statutes | NRS 534 (Underground Water & Wells), NRS 624 (Contractors), NAC
624.400 (C-23 Classification) |
| Total Questions | 300 Multiple-Choice Questions |
| Question Types | Multiple Choice (A, B, C, D) |
| Answer Format | Correct answer immediately following each question with detailed rationale
|
| Passing Score | 70% (approximately 32 correct out of 45–50 questions) |
| License Renewal | Every 3 years |
| Experience Required | Minimum 4 years of full-time qualifying well drilling experience |
| Minimum Age | 18 years old |
| Academic Year | 2026 |
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TABLE OF CONTENTS
| Section | Topic | Questions |
|---|---|---|
,| 1 | Regulatory Framework & Licensing | Q1–Q35 |
| 2 | Groundwater & Hydrogeology Fundamentals | Q36–Q65 |
| 3 | Well Drilling Methods & Equipment | Q66–Q100 |
| 4 | Well Construction, Casing & Screens | Q101–Q130 |
| 5 | Grouting, Sealing & Contamination Prevention | Q131–Q155 |
| 6 | Pump Systems & Water Storage Equipment | Q156–Q185 |
| 7 | Well Development, Testing & Rehabilitation | Q186–Q210 |
| 8 | Safety, OSHA & Jobsite Practices | Q211–Q240 |
| 9 | Nevada Water Regulations & Environmental Compliance | Q241–Q270 |
| 10 | Construction Mathematics, Plans & Specifications | Q271–Q300 |
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SECTION 1: REGULATORY FRAMEWORK & LICENSING
---
Q1. 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)
Answer: 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 NSCB
issues the contractor license itself, while NDEP oversees environmental protection aspects.
---
Q2. Which Nevada Revised Statutes (NRS) citation primarily governs the licensing of C-23 well
drillers?
A) NRS 534.020
B) NRS 534.110
C) NRS 624.120
D) NRS 624.150
Answer: B
Rationale: NRS 534.110 outlines the requirements, scope, and renewal procedures for the C-23
drilling license. NRS Chapter 534 contains the statutes that regulate well drilling, including driller
licensing requirements.
---
Q3. 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
Answer: 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".
---
Q4. Under Nevada law, which statute primarily governs the scope and limitations of a C-23
Drilling Wells license?
A) NRS 534.020 — Drilling for geothermal systems only
B) NRS 534.110 — Requirements, scope, and renewal procedures for the C-23 drilling license
C) NRS 624.120 — Specific activities permitted for C-23 licensees, including well construction,
repair, and related services
D) NRS 624.150 — Permits any type of excavation work including foundation drilling
Answer: C
Rationale: NRS 624.120 specifically outlines the activities permitted for C-23 licensees. The C-23
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.
---
Q5. How often must a C-23 well driller's license be renewed in Nevada?
A) Annually (every 1 year)
EXAM OVERVIEW
| Category | Details |
|---|---|
| Exam Title | Nevada C-23 Drilling Wells Contractor Examination |
| Issuing Authority | Nevada State Contractors Board (NSCB) |
| Governing Statutes | NRS 534 (Underground Water & Wells), NRS 624 (Contractors), NAC
624.400 (C-23 Classification) |
| Total Questions | 300 Multiple-Choice Questions |
| Question Types | Multiple Choice (A, B, C, D) |
| Answer Format | Correct answer immediately following each question with detailed rationale
|
| Passing Score | 70% (approximately 32 correct out of 45–50 questions) |
| License Renewal | Every 3 years |
| Experience Required | Minimum 4 years of full-time qualifying well drilling experience |
| Minimum Age | 18 years old |
| Academic Year | 2026 |
---
TABLE OF CONTENTS
| Section | Topic | Questions |
|---|---|---|
,| 1 | Regulatory Framework & Licensing | Q1–Q35 |
| 2 | Groundwater & Hydrogeology Fundamentals | Q36–Q65 |
| 3 | Well Drilling Methods & Equipment | Q66–Q100 |
| 4 | Well Construction, Casing & Screens | Q101–Q130 |
| 5 | Grouting, Sealing & Contamination Prevention | Q131–Q155 |
| 6 | Pump Systems & Water Storage Equipment | Q156–Q185 |
| 7 | Well Development, Testing & Rehabilitation | Q186–Q210 |
| 8 | Safety, OSHA & Jobsite Practices | Q211–Q240 |
| 9 | Nevada Water Regulations & Environmental Compliance | Q241–Q270 |
| 10 | Construction Mathematics, Plans & Specifications | Q271–Q300 |
---
SECTION 1: REGULATORY FRAMEWORK & LICENSING
---
Q1. 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)
Answer: 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 NSCB
issues the contractor license itself, while NDEP oversees environmental protection aspects.
---
Q2. Which Nevada Revised Statutes (NRS) citation primarily governs the licensing of C-23 well
drillers?
A) NRS 534.020
B) NRS 534.110
C) NRS 624.120
D) NRS 624.150
Answer: B
Rationale: NRS 534.110 outlines the requirements, scope, and renewal procedures for the C-23
drilling license. NRS Chapter 534 contains the statutes that regulate well drilling, including driller
licensing requirements.
---
Q3. 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
Answer: 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".
---
Q4. Under Nevada law, which statute primarily governs the scope and limitations of a C-23
Drilling Wells license?
A) NRS 534.020 — Drilling for geothermal systems only
B) NRS 534.110 — Requirements, scope, and renewal procedures for the C-23 drilling license
C) NRS 624.120 — Specific activities permitted for C-23 licensees, including well construction,
repair, and related services
D) NRS 624.150 — Permits any type of excavation work including foundation drilling
Answer: C
Rationale: NRS 624.120 specifically outlines the activities permitted for C-23 licensees. The C-23
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.
---
Q5. How often must a C-23 well driller's license be renewed in Nevada?
A) Annually (every 1 year)
