Projection welding is primarily used to join a stamped, forged or machined part to another part.

• A. True
• B. False
• C. Only for plastics
• D. Not used for sheet metal assemblies

Answer: (A)

Projection welding focuses electric current and heat through small raised features, or projections, on the parts being joined. This makes it ideal for welding metal parts that have been stamped, forged, or machined and then paired with another part, especially in sheet metal assemblies. The projections concentrate heat at the weld site, allowing strong, repeatable welds with minimal distortion, which is why this method is widely used in automotive bodies, enclosures, and other manufactured metal joints. It isn’t for plastics, and it isn’t limited to any other material type, so the statement that it’s primarily used to join a stamped, forged, or machined part to another part is correct.