Free Practice Questions for NC Plumbing Contractor
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Key Facts: NC Plumbing Contractor Exam
70%
Passing Score
NC Board of Examiners
~100
Questions
PSI exam
$125
Total Cost
$25 exam + $100 license
NC SPC
Code
Based on IPC
The NC plumbing contractor exam has approximately 100 questions requiring 70% to pass. NC uses the NC State Plumbing Code based on the IPC. The exam is administered by PSI with a $25 exam fee and $100 license fee. NC is one of few states with a contractor-level exam rather than journeyman.
Sample NC Plumbing Contractor Practice Questions
Try these sample questions to review concepts for the NC Plumbing Contractor exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 333+ question experience with AI tutoring.
1Under the IPC adopted by North Carolina, what is the minimum slope for a 4-inch horizontal drain?
2Under the IPC, what is the DFU value for a standard water closet?
3Under the IPC, what is the minimum size of a building drain serving water closets?
4Under the IPC, minimum vent pipe size is?
5Under the IPC, max static water pressure in a building is?
6Under the IPC, high-hazard cross-connections require what backflow device?
7Under the IPC, minimum trap seal depth is?
8Under the IPC, minimum lavatory trap size is?
9Under the IPC, minimum building water service is?
10Under the IPC, what material is NOT approved for underground drainage?
About the NC Plumbing Contractor Exam
North Carolina's plumbing exam is a contractor-level exam administered by PSI on behalf of the Board of Examiners. NC uses the NC State Plumbing Code, which is based on the IPC with state amendments. The exam covers drainage, venting, water supply, gas piping, and NC-specific requirements.
Exam sponsor: NC Board of Examiners of Plumbing, Heating & Fire Sprinkler Contractors (PSI). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Questions
100 questions
Time Limit
3-4 hours
Passing Score
70%
Reported exam pass rate: ~50%. This describes exam candidates, not OpenExamPrep users or results from using our resources. Exam sponsor website
Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Our practice resources: topics covered
We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.
Drainage, Waste & Vent Systems
NC SPC drainage pipe sizing, DFU calculations, slope requirements, cleanouts, and trap arm distances
Venting Systems
Vent sizing, wet venting, AAVs, vent termination, and circuit venting per NC SPC
Water Supply & Backflow Prevention
Water pipe sizing, WSFU calculations, backflow prevention, pressure regulation, and cross-connection control
Gas Piping & Venting
Gas pipe sizing, BTUH calculations, pressure testing, combustion air, and appliance venting
Code Administration & NC-Specific Rules
Permits, inspections, contractor responsibilities, NC state amendments, and business practices
Preparing for the NC Plumbing Contractor Exam
What You Need to Know
- Passing score: 70%
- Exam length: 100 questions
- Time limit: 3-4 hours
- Exam / certification fees: $25 + $100 license Official sources
Using Our Practice Resources
- Work through all 333 available questions
- Review every answer and explanation
- Track weak areas and revisit them
- Use our AI tutor for tough concepts
NC Plumbing Contractor: Suggested Study Strategy
Frequently Asked Questions
What plumbing code does North Carolina use?
North Carolina uses the NC State Plumbing Code (NC SPC), which is based on the International Plumbing Code (IPC) with state-specific amendments. IPC study materials are applicable with attention to NC amendments.
Is the NC exam a journeyman or contractor exam?
NC administers a contractor-level plumbing exam through the Board of Examiners of Plumbing, Heating & Fire Sprinkler Contractors. This is a higher-level exam that includes business and contracting knowledge in addition to technical plumbing code.
How much does the NC plumber exam cost?
The NC plumbing exam fee is $25 for the PSI exam, plus a $100 license fee to the Board of Examiners. Total initial cost is approximately $125.
What experience is needed for the NC plumbing contractor license?
NC requires documented plumbing experience under a licensed contractor. Contact the Board of Examiners for specific hour requirements and application procedures.