NCCER Sheet Metal Worker Practice Questions - NCCER Sheet Metal Worker Certification Exam

What is the purpose of a Pittsburgh lock seam in ductwork?

To connect duct to a diffuser To mechanically join two edges of sheet metal to form a longitudinal seam on rectangular duct To attach insulation To measure duct dimensions

Correct Answer:

To mechanically join two edges of sheet metal to form a longitudinal seam on rectangular duct

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