100+ Free TN HVAC Contractor Practice Questions
Pass your Tennessee HVAC/Refrigeration Contractor License Exam (CMC-C) exam on the first try — instant access, no signup required.
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Key Facts: TN HVAC Contractor Exam
$25,000
License Threshold
TN Board
73%
Trade Exam Pass Rate
TN Board
100
Trade Exam Questions
4-hour limit
3 yrs
Experience Required
Or ME degree
$106
Trade Exam Fee
TN Board
2021 IMC
Code Transition
Effective Mar 2026
About the TN HVAC Contractor Exam
Tennessee CMC-C HVAC/Refrigeration contractor licensing exam covering the $25,000 project threshold, 3-year experience requirement, 2021 IMC transition, trade knowledge for Tennessee's mixed climate, and NASCLA-based business law.
Questions
100 scored questions
Time Limit
4 hours
Passing Score
73%
Exam Fee
$106 (trade) + $53 (business/law) (Tennessee Board for Licensing Contractors)
TN HVAC Contractor Exam Content Outline
State Laws & Licensing
TN Board requirements, CMC/CMC-C classifications, $25K threshold, bonding, and insurance
Trade Knowledge
Load calculations, ductwork design, refrigerant handling, heat pumps, and system diagnostics
Mechanical Codes
2021 IMC transition, venting, combustion air, clearances, and Tennessee energy code
Safety Regulations
EPA 608, TOSHA, fall protection, CO safety, and lockout/tagout procedures
Business Management
NASCLA business/law, contracts, advertising, change orders, and TVA programs
How to Pass the TN HVAC Contractor Exam
What You Need to Know
- Passing score: 73%
- Exam length: 100 questions
- Time limit: 4 hours
- Exam fee: $106 (trade) + $53 (business/law)
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
TN HVAC Contractor Study Tips from Top Performers
Frequently Asked Questions
What is the Tennessee HVAC contractor license threshold?
Tennessee requires a contractor license for HVAC projects valued at $25,000 or more. The CMC-C license covers HVAC/Refrigeration work, while the CMC covers all mechanical work including plumbing.
What exams does Tennessee require?
Both a trade exam (100 questions, 4 hours, 73% passing, $106) and a business/law exam (open book with NASCLA guide, $53) are required. The 2021 IMC is transitioning in starting March 2026.
What experience is needed for the TN CMC-C license?
Three years of verifiable experience in the mechanical field or a mechanical engineering degree. A CPA-reviewed financial statement, insurance, and letter of reference are also required.