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2026 Statistics

Key Facts: WV Plumbing Contractor Exam

100 Q

Official Exam Questions

Prov WVCLB CIB 2026.05.07

70%

Passing Score

Prov WVCLB CIB 2026.05.07

3 hr

Time Allowed

Prov WVCLB CIB 2026.05.07

USD 59.95

Prov Exam Fee

Prov WVCLB CIB 2026.05.07

Open Book

Book Policy

Prov WVCLB CIB 2026.05.07

West Virginia Plumbing Contractor Examination is the official Board/Prov open-book exam: 100 questions, 70%, 3 hours, USD 59.95 (bulletin dated 2026.05.07). Official delivery is English.

Sample WV Plumbing Contractor Practice Questions

Try these sample questions to test your WV Plumbing Contractor exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1The West Virginia Plumbing Contractor Examination is the Contractor Licensing Board / Prov trade exam. Which official reference set does the 2026.05.07 bulletin list for that open-book exam?
A.Uniform Plumbing Code 2021, NFPA 54 2021, and OSHA 1926 only
B.International Plumbing Code 2018, International Fuel Gas Code 2018, and Plumbing Basics for Contractors 3rd Edition (2014)
C.International Residential Code 2021 and the West Virginia Division of Labor journeyman plumber booklet
D.National Standard Plumbing Code 2018 and IFGC 2021
Explanation: Prov WVCLB CIB 2026.05.07 lists three official references for the Plumbing Contractor (Master Plumber contractor classification) examination: International Plumbing Code 2018, International Fuel Gas Code 2018, and Plumbing Basics for Contractors 3rd Edition (2014). The exam is open book. This Board classification exam is not the Division of Labor journeyman plumber test and is not written to the UPC.
2Per IPC 2018 Section 301.7, if a manufacturer's installation instructions conflict with a requirement of the code, which provision applies?
A.The manufacturer's instructions always control
B.The less restrictive provision applies
C.The more restrictive provision applies
D.The contractor may choose either provision
Explanation: IPC 2018 Section 301.7 states that where conflicts occur between this code and the manufacturer's installation instructions, the more restrictive provisions shall apply. That keeps the installation at least as safe as the code minimum and at least as restrictive as the listing. On an open-book exam, find this general-regulation rule in Chapter 3 rather than guessing from field habit.
3IPC 2018 Chapter 2 defines developed length of piping as which measurement?
A.The shortest horizontal plan distance between the two endpoints
B.The length of a pipeline measured along the centerline of the pipe and fittings
C.The outside-of-insulation length, ignoring fitting takeouts
D.The vertical rise only, because horizontal runs are neglected
Explanation: Developed length is the length of a pipeline measured along the centerline of the pipe and fittings. Vertical offsets, horizontal runs, and the sweep of fittings all count. Trap-arm limits, vent sizing tables, and water-supply equivalent-length methods all use that centerline path.
4A drainage and vent system is water-tested in sections per IPC 2018 Section 312.2. What is the minimum test head and minimum hold time for each section?
A.5-foot head of water held for 10 minutes
B.10-foot head of water held for not less than 15 minutes
C.15-foot head of water held for 5 minutes
D.A 5 psi air test held for 30 minutes
Explanation: IPC 2018 Section 312.2 requires each tested section to be filled with water, but sections shall not be tested with less than a 10-foot head of water, and that pressure shall be held for not less than 15 minutes. The system must then be tight at all points. A 5 psi air test is a separate method under 312.3 and is not permitted on plastic piping.
5Per IPC 2018 Section 312.3, which statement about drainage and vent air testing is correct?
A.Plastic piping shall not be tested using air
B.Plastic piping may be air-tested at 5 psi for 15 minutes
C.An air test of 50 psi is required on all DWV systems
D.Air testing is never permitted on any drainage piping
Explanation: IPC 2018 Section 312.3 opens with a hard prohibition: plastic piping shall not be tested using air. Where air testing is used on non-plastic drainage and vent piping, the system is pressurized to a uniform 5 psi (or a 10-inch mercury column) and held for not less than 15 minutes. The 50 psi air option in 312.5 applies to water-supply piping that is not plastic, not to DWV.
6A plumber is selecting a test gauge for a 5 psi drainage air test. Per IPC 2018 Section 312.1.1, what is the maximum permitted gauge increment?
A.0.10 psi
B.1 psi
C.2 psi
D.5 psi
Explanation: IPC 2018 Section 312.1.1 requires tests at 10 psi or less to use a testing gauge having increments of 0.10 psi or less. A 5 psi DWV air test falls in that band. Coarser 1 psi or 2 psi gauges are allowed only on higher-pressure tests and cannot resolve a small drop on a 5 psi test.
7Per IPC 2018 Section 303.3, plastic pipe, fittings, and components used in a plumbing system shall be third-party certified as conforming to which standard?
A.NSF 14
B.NSF 61 only, with no plastic-pipe listing
C.ASTM A74
D.CISPI 301
Explanation: IPC 2018 Section 303.3 requires plastic pipe, fittings, and components to be third-party certified as conforming to NSF 14. NSF 61 addresses drinking-water health effects of water-supply products, not the plastic-pipe product listing required by 303.3. ASTM A74 and CISPI 301 are cast-iron soil-pipe standards.
8Per IPC 2018 Section 301.6, plumbing systems are prohibited in an elevator shaft or elevator equipment room except that floor drains, sumps, and sump pumps at the base of the shaft are permitted when they are which of the following?
A.Directly connected to the sanitary stack with a sanitary tee
B.Indirectly connected to the plumbing system and comply with the oil-separator rules of Section 1003.4
C.Connected to a grease interceptor serving the building kitchen
D.Omitted if the elevator pit is waterproofed
Explanation: IPC 2018 Section 301.6 prohibits plumbing in elevator shafts and elevator equipment rooms. The exception allows floor drains, sumps, and sump pumps at the base of the shaft only when they are indirectly connected and comply with Section 1003.4 oil-separator requirements. Direct sanitary connections and kitchen grease interceptors do not satisfy that elevator-pit exception.
9Per IPC 2018 Table 704.1, what is the minimum slope of a 2-inch horizontal drainage pipe that is not upstream of a grease interceptor?
A.1/16 inch per foot
B.1/8 inch per foot
C.1/4 inch per foot
D.1/2 inch per foot
Explanation: IPC 2018 Table 704.1 requires 1/4 inch per foot for piping 2-1/2 inches or less, 1/8 inch per foot for 3- to 6-inch pipe, and 1/16 inch per foot for 8-inch and larger pipe. A 2-inch drain is in the smallest band, so 1/4 inch per foot is the minimum. Piping upstream of a grease interceptor must be at least 1/4 inch per foot regardless of size.
10A 4-inch soil stack turns out to the building drain. Per IPC 2018 Section 704.3, a horizontal branch may first connect to that building drain no closer than which distance downstream of the stack?
A.4 inches
B.24 inches
C.40 inches
D.10 feet
Explanation: IPC 2018 Section 704.3 requires horizontal branches to connect to the bases of stacks at a point located not less than 10 times the diameter of the drainage stack downstream from the stack. For a 4-inch stack that distance is 40 inches. The same 10-diameter rule applies to connections downstream of a horizontal stack offset. Connecting closer dumps the stack's falling waste across the incoming branch.

About the WV Plumbing Contractor Exam

The West Virginia Plumbing Contractor Examination is the official Board trade examination administered by Prov. The official exam has 100 questions. Passing is 70% in 3 hours. The examination is open book. Prov lists USD 59.95 per attempt (West Virginia Contractor Licensing Board Candidate Information Bulletin dated 2026.05.07). The bulletin uses the Master Plumber contractor definition: installation, maintenance, extension, and alteration of piping, fixtures, appliances, venting, and water-supply systems, including gas piping, chilled-water piping, hot-water heating piping, and standpipe piping. Candidates must also pass the Contractor Licensing Act examination. This contractor classification is not the Division of Labor journeyman plumber certification. This bank is an English-language MCQ study adaptation. It does not replace required trade experience, Board approval, or the official examination.

Assessment

Open-book computer-based or paper-and-pencil multiple-choice. Official references: International Plumbing Code 2018, International Fuel Gas Code 2018, and Plumbing Basics for Contractors 3rd Edition (2014). Remote Examroom testing is available.

Time Limit

3 hours

Passing Score

70%

Exam Fee

USD 59.95 (Prov, Inc. (for the West Virginia Contractor Licensing Board))

WV Plumbing Contractor Exam Content Outline

10%

General Knowledge

General Knowledge (10 official items)

6%

Fixtures and Fittings

Fixtures and Fittings (6 official items)

5%

Storm Drainage

Storm Drainage (5 official items)

10%

Fuel Gas Systems

Fuel Gas Systems (10 official items)

7%

Safety

Safety (7 official items)

13%

Isometrics

Isometrics (13 official items)

14%

Water Supply and Distribution

Water Supply and Distribution (14 official items)

7%

Water Heaters

Water Heaters (7 official items)

14%

Drain, Waste and Vent Systems

Drain, Waste and Vent Systems (14 official items)

9%

Plumbing Math

Plumbing Math (9 official items)

5%

Plumbing Tools

Plumbing Tools (5 official items)

How to Pass the WV Plumbing Contractor Exam

What You Need to Know

  • Passing score: 70%
  • Assessment: Open-book computer-based or paper-and-pencil multiple-choice. Official references: International Plumbing Code 2018, International Fuel Gas Code 2018, and Plumbing Basics for Contractors 3rd Edition (2014). Remote Examroom testing is available.
  • Time limit: 3 hours
  • Exam fee: USD 59.95

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

WV Plumbing Contractor Study Tips from Top Performers

1Distribute study time to the official Prov Plumbing content outline (bulletin dated 2026.05.07)
2Tab the 2018 IPC listed in the bulletin; 53% of official items come from that code
3Practice drain, fixture-unit, and pipe-sizing calculations; Plumbing Math is 9 official items
4This bank is an English-language MCQ study aid, not an official Prov form

Frequently Asked Questions

How many questions are on the West Virginia Plumbing Contractor Examination?

The official Prov examination has 100 questions. Passing is 70% within 3 hours (West Virginia Contractor Licensing Board Candidate Information Bulletin dated 2026.05.07).

How much does the West Virginia Plumbing Contractor exam cost?

Prov lists USD 59.95 per attempt, including retakes. The Board charges a separate USD 90 annual contractor license fee under 28CSR2 §28-2-5.5 (effective May 4, 2026).

Is this the same as the West Virginia journeyman plumber exam?

No. This is the Contractor Licensing Board plumbing-contractor classification examination. Individual plumber certifications are a separate Division of Labor program.

Do I also need the Contractor Licensing Act exam?

Yes. The Board requires every contractor license applicant to pass the Contractor Licensing Act examination in addition to any applicable trade classification examination.