About AZ-ACR Exam Prep
An independent practice platform for the Arizona R-39R/C-39 (CR-39) Air Conditioning and Refrigeration (Residential/Commercial) Examination (AZ-ACR) exam - real questions across every exam domain, each with a plain-language explanation.
What's on the AZ-ACR exam
The Arizona R-39R/C-39 (CR-39) Air Conditioning and Refrigeration (Residential/Commercial) Examination (AZ-ACR) exam is organized into 12 knowledge domains. It has 80 questions and is completed in 3 hours 30 minutes. Here is what it covers:
- Refrigeration
- Air Conditioning
- Warm Air Heating
- Controls and Motors
- Boilers
- Ventilation
- Evaporative Coolers
- Fuel Piping Systems
- Water Piping Systems
- Steam, Hot, Chilled, and Condensing Water
- Testing, Balancing, and Inspections
- Sizing and Estimating
Every practice question on this site is organized across these 12 domains, so your study tracks the real exam structure instead of guesswork. As you answer, the per-domain analytics surface the areas still costing you points, so your review goes where it moves your score.
What we believe good exam prep looks like
Realistic practice beats passive reading. Every question is written to mirror the style and difficulty of the real exam, with a clear explanation of why the right answer is right and the others aren't.
Your weak spots should find you. Domain analytics, mistake review, and re-drilling are built in, so study time goes where it moves your score.
Pricing should be simple. One payment for a fixed access window matched to your exam date. No subscription, no auto-renewal, and 10 free questions to try before you spend anything.
Get in touch
Questions, feedback, or something not working? Email support@boardmentor.study - candidate messages are read and answered.