The Refrigeration and Air Conditioning Technology, 9th Edition; Pre-Printed Tabs set from 1 Exam Prep is designed to accompany the Cengage-published textbook recognized by the EPA and HVAC licensing authorities across multiple states. This reference is a primary study tool for candidates preparing for conditioned air, mechanical, and refrigeration contractor exams, including PSI-administered tests in Florida, Georgia, and Alabama. The pre-printed tabs provide quick navigation through essential sections such as thermodynamics, system components, troubleshooting, electrical theory, refrigerants, and safety practices. Organized for open-book exam efficiency, these tabs correspond directly to the 9th Edition structure used in technical certification programs. 1 Exam Prep aligns this resource with NASCLA and state licensing requirements to support candidates in mastering refrigeration cycles, system diagnostics, and HVAC service procedures under current mechanical codes.