The section every 608 candidate takes: why refrigerants are regulated at all, the venting prohibition, who counts as a technician, who may buy refrigerant, and the definitions the rest of the exam is built on. Every answer shows the rule and its citation.
Rules current as of October 21, 2026.
One question at a time, instant feedback, running score. No sign-up, nothing saved — your answers never leave this phone or browser.
Studying for the real exam, or a certified tech checking the new rules? Either way, if an old study guide disagrees with an answer here, the citation under the answer is the one to trust.
