Texas HVAC Exam Prep: 1,500 Practice Questions for the TDLR Air Conditioning and Refrigeration Exams
PassProfessor’s Texas HVAC Exam Prep is built for candidates for the TDLR Air Conditioning and Refrigeration Contractor license — Environmental Air and Commercial Refrigeration, Class A and Class B — and for the Certified Technician exam. The bank holds 1,500 original practice questions: a 1,250-question HVAC core covering the trade itself, plus 250 Texas questions on Texas licensing law and the mechanical and fuel gas codes Texas tests.
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
- Texas exams are administered by PSI. Environmental Air Class A: 120 scored questions plus 5 pretest questions, 230 minutes, open book. Environmental Air Class B: 100 scored plus 5 pretest, 170 minutes.
- Commercial Refrigeration Class A: 120 scored plus 5 pretest, 230 minutes. Class B: 100 scored plus 5 pretest, 170 minutes. Certified Technician: 60 scored plus 4 pretest, 112 minutes.
- Passing on each Texas exam is 70%.
- Exam references are the 2024 International Mechanical Code, the 2024 International Fuel Gas Code, and the 2024 Uniform Mechanical Code — the editions in effect for Texas testing from September 1, 2026 — together with Texas Occupations Code Chapter 1302 and the TDLR rules at 16 Texas Administrative Code Chapter 75.
- Class A licenses cover systems of any size. Class B is capped at 25 tons of cooling or 1.5 million Btu of heating in a single system. A Certified Technician performs air conditioning and refrigeration work under the supervision of a licensed contractor.
How the practice program works
The full practice exam draws 120 questions across all 18 topics in proportion to the bank — the same length and 230-minute limit as the Environmental Air Class A exam — 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 Texas law on its own or work the trade topics one at a time:
- Refrigeration Principles & Components — 114 questions
- Refrigerants, Recovery & Handling — 55 questions
- Cooling Systems: Service, Diagnostics & Repair — 104 questions
- Heating Systems — 212 questions
- Air Distribution, Duct Design & Airflow — 114 questions
- Controls & Electrical for HVAC — 110 questions
- Piping, Brazing & Gas Piping — 65 questions
- Ventilation, Venting, Combustion Air & IAQ — 87 questions
- Load Calculation & System Design — 49 questions
- Safety, Testing & Code Practice — 85 questions
- Commercial Refrigeration Systems — 41 questions
- Equipment Installation & Commissioning — 75 questions
- Hydronics & Boilers — 35 questions
- Business & Law Practice — 50 questions
- Plan Reading & Construction Documents — 25 questions
- Packaged & Manufactured Systems — 50 questions
- Texas Licensing Law & Rules — 125 questions
- Texas Mechanical & Fuel Gas Code — 104 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 Texas exams. PRACTICE BENCHMARK ONLY — your score here is a study signal, not a result on the real exam.
Questions
Which Texas licenses does this cover?
The contractor exams — Environmental Air (Class A and B) and Commercial Refrigeration (Class A and B) — and the Certified Technician exam. They test the same trade core, and the Texas portion of this bank covers the licensing law and the 2024 Texas-adopted codes they share.
Is the practice exam timed like the real one?
Yes. The full practice exam allows 230 minutes for 120 questions, matching the Environmental Air Class A exam. The real exams are 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 the published exam content areas 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 Texas exams. PRACTICE BENCHMARK ONLY — your score here is a study signal, not a result on the real exam.
Enroll: Product: /product/texas-hvac-exam-prep/ — $79 for the full program.