Test Your HVACR Knowledge: Gas, Oil, and Combustion Basics Every Contractor Should Know

From combustion fundamentals to gas and oil system best practices, take this quick quiz to see how sharp your HVACR knowledge really is.
Feb. 5, 2026

A special thank you to Renee Tomlinson and Howard Weiss of the ESCO Group for providing this quiz. ESCO's materials are utilized within hundreds of schools, wholesalers and other training entities across the globe. escogroup.org

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