Which organization is associated with sheet metal contractors?

• A. ITI
• B. SMACNA
• C. SMWIA
• D. NECA

Answer: (B)

The main idea is that SMACNA is the national organization formed to represent sheet metal contracting firms. It provides the technical standards, guidelines, and best practices that sheet metal contractors use for fabrication and installation, especially in HVAC duct work. This role as a contractors’ association—developing and publishing industry standards—fits the question perfectly.

The other groups serve different functions: SMWIA is a labor union for sheet metal workers, NECA is for electrical contractors, and ITI refers to a training or technical organization not specifically the contracting association for sheet metal.