Not recall — decisions. Each question puts you on the job — on the roof, in the chiller room, at the counter — and asks what you do first. Every correct action traces to a CFR rule, with its citation under the answer.
Rules current as of October 23, 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.
