NV C-1A Boilers Practice Questions - Nevada C-1A Boilers Contractor Examination Exam

An unlisted single-wall connector into a shared Category I masonry chimney with a draft hood. A Type B vent sloped 1/4 inch per foot into an unlined brick chimney. A listed positive-pressure, corrosion-resistant vent (special gas vent, often stainless or approved plastic) with a condensate drain. No vent, because condensing boilers have no flue gas.