GA-CAC Study Guide 2026: How to Pass on Your First Attempt

What the GA-CAC Exam Actually Tests

The Georgia Conditioned Air Contractor Class II (Unrestricted) License Exam is the credentialing test that stands between an experienced HVAC professional and an unrestricted contractor license in Georgia. It's governed by the Georgia Construction Industry Licensing Board through its Division of Conditioned Air Contractors, with PSI handling exam administration. That combination matters: the Board sets the eligibility bar and reference materials, while PSI runs the computer-based testing centers and scores your attempt.

This is not a general HVAC knowledge quiz. It's a licensure exam built around real code compliance, load calculations, and field judgment - the kind of decisions a lead mechanic or supervisor makes daily on commercial and residential systems. If you're just getting oriented to what this credential is and who it's for, our overview at What Is GA-CAC? is a good starting point before you dive into study mechanics.

Exam Format, Scoring, and References

The GA-CAC exam is computer-based and multiple-choice, split into two parts, each running 3 hours and 30 minutes. Across both parts you'll answer 100 scored questions, plus 20 unscored beta questions that are indistinguishable from the scored ones - meaning you should treat every question on screen as if it counts, because you can't tell which ones don't.

To pass, you need a minimum final scaled score of 70. Scaled scoring means your raw number of correct answers gets converted to a reporting scale, so you can't simply count "70 out of 100 questions right" as your target. For a full breakdown of how scaled scoring works and what it means for your preparation, see GA-CAC Passing Score 2026: Exactly What You Need to Pass.

Because the exam is reference-permitted, you're allowed to bring approved code books and use them during testing. That changes how you should study - memorization matters less than knowing exactly where to find information fast under a strict time limit. Two 3.5-hour sessions sounds generous until you're flipping through a mechanical code book question after question.

Breaking Down the Four Exam Domains

The exam content is organized into four domains, and they are not weighted equally. Understanding the split is the single most important planning decision you'll make, because it tells you where to spend your limited study hours.

For a question-by-question style walkthrough of what each domain emphasizes, the dedicated GA-CAC Exam Domains 2026: Complete Guide to All 4 Content Areas goes deeper than we can here. And if you're trying to gauge how tough this exam feels relative to your current experience level, How Hard Is the GA-CAC Exam? Complete Difficulty Guide 2026 walks through the difficulty factors in more detail.

Eligibility and Application Mechanics

You can't just register and sit for the GA-CAC exam - Board approval is required first, and that approval process is where most candidates either move quickly or get stuck. Georgia's current Class II law requires five years of full-time qualifying experience, broken into specific segments:

• Two years of commercial supervisory experience
• One year as a service technician or service supervisor
• Two years of installation as a lead mechanic, with at least one commercial year working on systems exceeding 175,000 BTU of heating and 60,000 BTU of cooling

Beyond the raw experience hours, applicants must submit experience affidavits and references, pass a criminal background check, and hold both EPA Section 608 Type II and Type III certification. You'll also need to complete Board-approved heat-loss/gain and duct-design training documented through Manuals J, D, N, and Q - the same design methodology tested heavily in Domain 2. Identity and lawful-presence documentation round out the application file.

The Class II licensure-by-examination application fee is $110. That fee applies to the licensure application itself, separate from any study materials or review courses you invest in along the way. If you want the complete cost picture - application fee, renewal costs, and other expenses candidates commonly overlook - see GA-CAC Certification Cost 2026: Complete Pricing Breakdown. For the full eligibility checklist laid out step by step, GA-CAC Requirements 2026: Eligibility, Prerequisites & How to Qualify covers each requirement in sequence.

A Domain-Weighted Study Timeline

A generic weekly study calendar doesn't work well here because the domains aren't weighted evenly. Since System Design carries 55% of the scored content, your schedule should mirror that imbalance rather than splitting time evenly across four domains.

Timed, full-length practice matters more for this exam than flashcard repetition alone, because the reference-permitted format means your bottleneck is often speed of navigation, not raw recall. Running practice questions under realistic time pressure on our GA-CAC practice test platform before test day helps you calibrate how much time you can afford per question in each domain.

Reference Book Strategy and Exam-Day Rules

For exams scheduled May 1 through December 31, 2026, the approved references are the 2024 Georgia Gas and Mechanical Codes with Georgia amendments, along with the 2023 NEC. These are the only materials PSI will allow you to bring into the testing center - no substitutes, no outdated editions.

The rules around how you can prepare those books are specific and worth knowing well before test day:

• Permanent tabs are allowed - use them liberally to mark sections you expect to reference under System Design and Installation questions.
• Highlighting and underlining are allowed within your reference books.
• Photocopies are prohibited - you must bring the actual approved editions.
• Handwritten notes are prohibited - you cannot annotate margins with your own commentary or formulas.

Get your reference books tabbed and marked at least a few weeks before your scheduled date, then run practice sessions using those exact same books. Familiarity with your own tab layout under time pressure is a skill in itself. If you haven't locked in your test date yet, review GA-CAC Exam Dates 2026: Testing Windows, Deadlines & Scheduling to understand the scheduling windows and deadlines tied to Board approval.

If You Don't Pass the First Time

Georgia's rule here is direct: after two failed attempts, a Board-approved review course is required before you're permitted to sit for a third exam. That's a real consequence for going in underprepared - it costs time, and potentially money, beyond just the retake itself.

This is one more reason to treat your first attempt seriously rather than as a "test the waters" run. Build your study plan around the actual domain weighting, use full-length timed practice, and don't walk in without having handled realistic System Design problems repeatedly. For a broader look at what makes this exam more or less approachable depending on your background, How Hard Is the GA-CAC Exam? Complete Difficulty Guide 2026 is worth reading alongside your study plan. If you're also weighing whether pursuing the unrestricted license is worth the time investment relative to your career goals, Is the GA-CAC Certification Worth It? Complete ROI Analysis 2026 covers that decision in depth.

Once you've earned your license, remember that maintenance doesn't stop at passing the exam. Licenses renew by November 30 of odd-numbered years, and you'll need four CE hours per year, totaling eight hours per renewal cycle. Planning your continuing education early keeps your unrestricted Class II license active without last-minute scrambling.

Frequently Asked Questions