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What is a common method to fasten acoustical lining to the inside of sheet metal duct?

  1. Magnetic clips

  2. Welding

  3. Zip ties

  4. Tabs and adhesives

The correct answer is: Tabs and adhesives

Tabs and adhesives are a common method used to fasten acoustical lining to the inside of sheet metal ducts because they provide a secure and durable bond between the lining and the ductwork. Tabs help hold the lining in place while the adhesive ensures a strong attachment. This method is preferred over other options like magnetic clips, welding, or zip ties as they may not provide the same level of secure and long-lasting attachment for acoustical linings in sheet metal ductwork.