How many separate specialties are there within the overall sheet metal trade?

• A. 7
• B. 8
• C. 9
• D. 10

Answer: (C)

The main idea is that the sheet metal trade is divided into distinct areas of work, with nine separate specialties recognized in the standard classifications. This split reflects the variety of tasks, materials, and environments the trade covers—from fabricating and installing HVAC ductwork to architectural metal, roofing and siding, ornamental work, and shop fabrication. Apprentices typically train across these nine areas, and journeymen may focus on a subset, but the overall framework is nine. That’s why nine is the correct count.