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A fixture's drain vent connects to the drain line downstream of the trap. What is the vent's MAIN function?

Practice questions based on the published NAAEI CAMT domains — Essential Trade Skills, Compliance, Facilities Operations, and Professional Development & Collaboration — and on standard trade practice. CAMT and NAAEI are marks of the National Apartment Association; this site is not affiliated with or endorsed by NAA or NAAEI. Code requirements, licensing boundaries and permit rules vary by jurisdiction and revise on a cycle, so none is tested here as a recalled figure — always verify the code having jurisdiction and use a licensed contractor where the work requires one. Confirm current program requirements with NAAEI before testing.

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