100+ Free DC HVAC Practice Questions
Pass your District of Columbia Refrigeration and Air Conditioning Contractor License exam on the first try — instant access, no signup required.
Loading questions...
About the DC HVAC Exam
The DC HVAC contractor license requires a master mechanic license or employing a licensed master, plus a $5,000 surety bond. The journeyman exam covers theory, system types, terminology, and general requirements. Licenses are renewed every two years through the DLCP.
Questions
100 scored questions
Time Limit
2 hours
Passing Score
70%
Exam Fee
$185 (DC Board of Industrial Trades)
DC HVAC Exam Content Outline
DC Laws & Regulations
Board of Industrial Trades rules, licensing requirements, bond requirements, and renewal procedures
Trade Knowledge
Refrigeration cycle, system types, load calculations, duct design, and equipment selection
Mechanical Codes
DC Construction Codes, IMC, energy conservation, fire dampers, and ventilation requirements
Safety & EPA
EPA Section 608, OSHA standards, refrigerant handling, worker safety, and indoor air quality
How to Pass the DC HVAC Exam
What You Need to Know
- Passing score: 70%
- Exam length: 100 questions
- Time limit: 2 hours
- Exam fee: $185
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
Frequently Asked Questions
Is there a separate contractor exam in DC?
No. The contractor license requires a master mechanic license but no separate examination. The cost is $185 with a $5,000 bond.
How often must DC HVAC licenses be renewed?
Every two years. The bond must expire on September 30th of each even year.
What does the journeyman exam cover?
60 questions in 2 hours covering theory, system types, terminology, and general requirements.