100+ Free NC Plumbing Contractor Practice Questions
Pass your North Carolina Plumbing Contractor License Exam exam on the first try — instant access, no signup required.
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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.
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.
Questions
100 scored questions
Time Limit
3-4 hours
Passing Score
70%
Exam Fee
$25 + $100 license (NC Board of Examiners of Plumbing, Heating & Fire Sprinkler Contractors (PSI))
NC Plumbing Contractor Exam Content Outline
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
How to Pass the NC Plumbing Contractor Exam
What You Need to Know
- Passing score: 70%
- Exam length: 100 questions
- Time limit: 3-4 hours
- Exam fee: $25 + $100 license
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
NC Plumbing Contractor Study Tips from Top Performers
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.