South Carolina HVAC Exam Prep: 1,450 Practice Questions for the Commercial Mechanical Contractor Exams
PassProfessor’s South Carolina HVAC Exam Prep is built for candidates for South Carolina’s commercial Mechanical Contractor license, issued by the Contractor’s Licensing Board, and for the residential HVAC specialty credential. The bank holds 1,450 original practice questions: a 1,250-question HVAC core covering the trade itself, plus 200 South Carolina questions – 75 on South Carolina licensing law, 15 on business and law application, and 110 written to the commercial Air Conditioning exam’s published content outline.
Every question is an original item written for this program, and every question comes with an explanation for every answer: why the keyed answer is right and why each other option is wrong, grounded in the cited code, standard, manual, or rule.
The exam, in facts
- South Carolina runs two license systems for this trade: the commercial Mechanical Contractor license (Contractor’s Licensing Board), held by the business entity through its qualifying parties, and the Residential Specialty Contractor – HVAC credential (Residential Builders Commission).
- A commercial license is required when the total cost of construction exceeds $10,000; the residential HVAC specialty credential covers work over $500 on residential units up to 5 tons of cooling or 175,000 BTU per hour of heating per unit.
- The commercial Air Conditioning exam is administered by PSI: open book, 80 questions, 70% to pass, 4 hours, $64. The commercial Business Management and Law exam (50 questions, 70% to pass, 125 minutes, $78) is required of commercial candidates and keys to the NASCLA South Carolina Commercial Contractor Guide, 9th edition.
- Pass marks differ by exam and are never interchangeable: the commercial Heating and Refrigeration exams run 50 questions at 70% in 3 hours, Packaged Equipment runs 80 questions at 70% in 4 hours, and the residential HVAC exam runs 80 questions at 65% (52 of 80) in 240 minutes.
- A qualifying party passes the technical exam and the South Carolina laws exam at 70% or better; a primary qualifying party also files an affidavit of 2 years of full-time experience in the classification within the prior 5 years.
- Commercial licenses sit in groups 1 through 5 by job limit and net worth (Group 1: jobs to $35,000 on $7,000 net worth; Group 5: unlimited on $300,000 net worth), or a surety bond in the same amounts. Commercial licenses renew every 2 years and expire October 31 of odd-numbered years.
How the practice program works
The full practice exam draws 80 questions in 240 minutes – the same length and time as the commercial Air Conditioning exam – weighted to that exam’s published outline across the bank’s 18 topics, and every attempt draws a fresh assortment, so no two practice exams are the same.
Each of the bank’s 18 topics has its own drill, so you can drill South Carolina licensing law on its own or work the trade topics one at a time:
- Refrigeration Principles & Components — 116 questions
- Refrigerants, Recovery & Handling — 59 questions
- Cooling Systems: Service, Diagnostics & Repair — 96 questions
- Heating Systems — 219 questions
- Air Distribution, Duct Design & Airflow — 132 questions
- Controls & Electrical for HVAC — 110 questions
- Piping, Brazing & Gas Piping — 89 questions
- Ventilation, Venting, Combustion Air & IAQ — 115 questions
- Load Calculation & System Design — 53 questions
- Safety, Testing & Code Practice — 89 questions
- Commercial Refrigeration Systems — 45 questions
- Equipment Installation & Commissioning — 75 questions
- Hydronics & Boilers — 37 questions
- Business & Law Practice — 50 questions
- Plan Reading & Construction Documents — 25 questions
- Packaged & Manufactured Systems — 50 questions
- South Carolina Licensing Law & Rules — 75 questions
- South Carolina Business & Law — 15 questions
Try the free 12-question sample first — it uses a fixed set of questions so you can see exactly how explanations read before you buy.
Our practice exam is scored against a 70% practice benchmark, set to mirror PSI’s published 70% passing standard for the South Carolina commercial Air Conditioning exam. PRACTICE BENCHMARK ONLY — your score here is a study signal, not a result on the real exam.
Questions
Which South Carolina license does this cover?
The commercial Mechanical Contractor license first – the practice exam mirrors the commercial Air Conditioning exam, the qualifying-party route most HVAC contractors take – with South Carolina law coverage that also serves the residential specialty credential. The residential HVAC exam itself passes at 65% (52 of 80), not 70%; the guide keeps every exam’s pass mark separate.
Is the practice exam timed like the real one?
Yes. The full practice exam allows 240 minutes for 80 questions, matching the commercial Air Conditioning exam. The real exam is open book; how you use references while practicing is up to you.
Are these real exam questions?
No. Every question is original to PassProfessor, written from PSI’s published exam outline and the cited references. Nothing here is copied or paraphrased from a licensing exam or a competitor’s bank.
What does the 70% benchmark mean?
Our practice exam is scored against a 70% practice benchmark, set to mirror PSI’s published 70% passing standard for the South Carolina commercial Air Conditioning exam. PRACTICE BENCHMARK ONLY — your score here is a study signal, not a result on the real exam.
Enroll: Product: /product/south-carolina-hvac-exam-prep/ — $79 for the full program.