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100+ Free NV C-23 Drilling Wells Practice Questions

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2026 Statistics

Key Facts: NV C-23 Drilling Wells Exam

45 Q

Official Exam Questions

PSI Nevada Contractor CIB updated 3/25/2026

32 of 45 points

Passing Score

PSI Nevada Contractor CIB updated 3/25/2026

1.5 hours

Time Allowed

PSI Nevada Contractor CIB updated 3/25/2026

USD 95

PSI Exam Fee (one portion)

PSI Nevada Contractor CIB updated 3/25/2026

Open Book

Book Policy

PSI Nevada Contractor CIB updated 3/25/2026

Nevada C-23 Drilling Wells Contractor Examination is the official NSCB/PSI open book exam: 45 questions, 32 of 45 points, 1.5 hours, USD 95 (bulletin 270, updated 3/25/2026). Official delivery: English.

Sample NV C-23 Drilling Wells Practice Questions

Try these sample questions to test your NV C-23 Drilling Wells exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What work may a Nevada C-23 contractor perform under NAC 624.400?
A.Construct surface water treatment plants and chlorination buildings
B.Install and repair water wells, pressure tanks, storage tanks, and pumps by boring, drilling, excavating, casing, cementing, dewatering, and cleaning to provide uncontaminated water
C.Drill oil, gas, and geothermal production wells and set production packers
D.Install municipal sewer mains and storm-drain laterals
Explanation: NAC 624.400 grants the C-23 classification for drilling wells and installing pumps, pressure tanks, and storage tanks considered integral to water wells. The holder may install and repair those works by boring, drilling, excavating, casing, cementing, dewatering, and cleaning to provide a supply of uncontaminated water. Oil, gas, geothermal, sewer, and treatment-plant work sit in other classifications.
2How does the Nevada C-23 contractor license differ from the Division of Water Resources well-driller license?
A.C-23 replaces the need to follow NAC 534 construction standards
B.The DWR license authorizes commercial building construction statewide
C.C-23 is the NSCB specialty contractor classification; the DWR license is the State Engineer well-driller card required to physically drill, plug, or rehabilitate a water well
D.They are the same credential issued on one application
Explanation: NRS 534.140 requires an annual State Engineer well-driller license before physically drilling a water well and, separately, an NSCB contractor license for the owner of the rig. C-23 is the NSCB trade classification tested on this exam. NAC 534 still governs how the hole is built. Holding C-23 does not waive the State Engineer card or the construction chapter.
3Under NAC 534.020, what is annular space?
A.The open interval of screen below the static water level
B.The void inside a pressure tank above the waterline
C.The gap between a pitless adapter and the service line
D.The space between two cylindrical objects, one surrounding the other, such as between the borehole wall and the casing
Explanation: NAC 534.020 defines annular space as the space between two cylindrical objects, one of which surrounds the other, such as the space between the borehole walls and the casing. That annulus is where the sanitary seal and gravel pack are placed. It is not the screen opening, tank air cushion, or pitless fitting gap.
4Under NAC 534.220, which penetration is a well?
A.A hole made to measure, test, sample, or produce groundwater, including a water, monitoring, or exploratory well
B.Any excavation deeper than 5 feet regardless of purpose
C.A blast hole loaded with explosives for mining
D.A geotechnical soil boring drilled only for engineering properties
Explanation: NAC 534.220 defines a well as a penetration made to measure, test, sample, or produce groundwater, including water, monitoring, and exploratory wells. Blast holes and geotechnical soil borings have their own definitions and are not production wells. Depth alone does not make a hole a well.
5Under NAC 534.015, when is a well or borehole considered abandoned?
A.When the owner files a change application under NRS 533
B.When use is discontinued or it is left in disrepair so that use would be impracticable, may contaminate groundwater, or may pose a public health or safety hazard
C.Only after the State Engineer records a formal deed of abandonment
D.Only when the pump has been pulled for seasonal storage
Explanation: NAC 534.015 defines abandon as discontinuing use or leaving the well or borehole in such disrepair that using it would be impracticable, may contaminate groundwater, or may otherwise pose a public health or safety hazard. Pulling a pump for service is not abandonment. Formal plugging still follows NAC 534.420.
6If the licensed well driller leaves the drill site while the rig is operating, what must happen under NAC 534.330?
A.Work may continue if the C-23 contractor is reachable by phone
B.Only sealing and plugging require the licensed driller on site
C.The drilling operation must be shut down until that licensed driller or another licensed well driller returns
D.A helper with two years of experience may keep turning the bit
Explanation: NAC 534.330 requires the licensed well driller to directly supervise the site whenever the rig is operating and whenever construction, rehabilitation, or plugging is underway. If that driller leaves, the operation must shut down until that licensed driller or another licensee under the chapter returns. Phone availability is not presence.
7Before a well rig may be set up to drill, plug, or rehabilitate a well, NAC 534.320 requires what?
A.Only a verbal call to the county building department
B.Only a posted card on the property fence
C.No filing if the well is for domestic use
D.A notice of intent submitted to the Division and Division approval of that notice
Explanation: NAC 534.320 requires a notice of intent and Division approval before the rig is set up or drilling, plugging, or rehabilitation begins. The notice must reach the Division at least three working days before setup. Reconditioning an existing well is the listed exception; domestic use is not an exception.
8After the Division approves a notice of intent, when must the well driller notify the Division in writing before work starts?
A.At least 24 hours before the work will commence
B.At least 7 calendar days before mobilizing
C.Within 24 hours after the first bag of grout is placed
D.Only if artesian flow is encountered
Explanation: NAC 534.320 requires written notice to the Division at least 24 hours before work commences after the notice of intent is approved. Only then may the rig be set up and drilling, plugging, or rehabilitation start. The 24-hour start call is in addition to the three-working-day NOI filing.
9When does an approved notice of intent lapse under NAC 534.325?
A.Only if the owner sells the parcel
B.If drilling, plugging, or rehabilitation is not commenced within 60 days after approval or by the commence date listed on the notice, whichever is later
C.At sunset on the day it is approved
D.One year after the Well Driller's Report is filed
Explanation: NAC 534.325 lapses a notice of intent if the described work does not start within 60 days after Division approval or by the commence date on the notice, whichever is later. A new notice, including the lapsed number and the required fee, must be approved before work may proceed. A new 24-hour start notice is then required.
10Within what time must a Well Driller's Report be submitted after drilling, plugging, or rehabilitation is completed?
A.60 days
B.1 year
C.30 days
D.10 days
Explanation: NAC 534.340 and NRS 534.170 require the Well Driller's Report within 30 days after completion of drilling, plugging, or rehabilitation. The report must be typewritten or legibly handwritten in black ink on the Division form. Reconditioning an existing well does not require a report.

About the NV C-23 Drilling Wells Exam

The Nevada C-23 Drilling Wells Contractor Examination is the official Nevada State Contractors Board trade examination administered by PSI Services LLC. The official exam has 45 scored questions. Passing is 32 of 45 points in 1.5 hours. The examination is open book. Nevada Administrative Code 534: Underground Water and Wells (allowed in center). PSI lists USD 95 for one examination portion and USD 140 if taken with CMS; otherwise USD 95 per trade exam (Candidate Information Bulletin 270, updated 3/25/2026). NSCB requires a separate CMS examination for most new applicants, plus a USD 300 application fee and a USD 600 biennial license fee. This English-language MCQ bank is a study aid, not an official PSI form. It does not replace required trade experience, board approval, fingerprints, bonding, or the official examination.

Assessment

Open Book computer-based multiple-choice. Nevada Administrative Code 534: Underground Water and Wells (allowed in center)

Time Limit

1.5 hours

Passing Score

32 of 45 points

Exam Fee

USD 95 (PSI Services LLC (for the Nevada State Contractors Board))

NV C-23 Drilling Wells Exam Content Outline

22%

General Regulations

General Regulations (10 items)

11%

Drilling and Boreholes

Drilling and Boreholes (5 items)

13%

Casings and Screens

Casings and Screens (6 items)

13%

Grouting and Sealing

Grouting and Sealing (6 items)

11%

Contamination Prevention

Contamination Prevention (5 items)

7%

Testing

Testing (3 items)

9%

Safety and General Knowledge

Safety and General Knowledge (4 items)

13%

Pumps and Tanks

Pumps and Tanks (6 items)

How to Pass the NV C-23 Drilling Wells Exam

What You Need to Know

  • Passing score: 32 of 45 points
  • Assessment: Open Book computer-based multiple-choice. Nevada Administrative Code 534: Underground Water and Wells (allowed in center)
  • Time limit: 1.5 hours
  • Exam fee: USD 95

Keys to Passing

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

NV C-23 Drilling Wells Study Tips from Top Performers

1Distribute study time to the official bulletin 270 content outline (updated 3/25/2026)
2Use only the PSI-listed references; temporary tabs such as Post-it notes are prohibited
3Confirm NSCB experience documentation before scheduling with PSI
4This bank is an English-language MCQ study aid, not an official PSI form

Frequently Asked Questions

How many questions are on the Nevada C-23 Drilling Wells Contractor Examination?

The official PSI examination has 45 scored questions. Passing is 32 of 45 points within 1.5 hours (Candidate Information Bulletin 270, updated 3/25/2026).

How much does the NV C-23 exam cost?

PSI lists USD 95 for one examination portion. Two portions cost USD 140 only if the second portion is CMS. NSCB charges a separate USD 300 application fee and USD 600 biennial license fee.

Is the NV C-23 exam open book?

Yes. PSI lists this examination as open book. Nevada Administrative Code 534: Underground Water and Wells (allowed in center)

Do I still need the CMS examination?

CMS is the required Nevada business-and-law examination. Most new applicants must pass CMS and a trade examination for the requested classification. In most cases you will not retake an exam if you have actively served as a qualified employee in the same classification within the last four years.