Which process fuses two pieces of metal by applying heat?

Which process fuses two pieces of metal by applying heat?

• A. Soldering
• B. Brazing
• C. Welding
• D. Riveting

Answer: (C)

Fusing two metal pieces means joining them by melting the metal at the joint so the molten material flows together and forms a single solid piece as it cools. Welding does this by heating the joint until the base metals melt and fuse, often with filler material to help build up the weld and ensure strength. Once it solidifies, the joint behaves as one piece. Soldering and brazing use heat too, but they melt only a separate filler metal while the base metals remain solid, so they don’t truly fuse the metals. Riveting joins parts by mechanically fastening a rivet, with no melting involved.

Fusing two metal pieces means joining them by melting the metal at the joint so the molten material flows together and forms a single solid piece as it cools. Welding does this by heating the joint until the base metals melt and fuse, often with filler material to help build up the weld and ensure strength. Once it solidifies, the joint behaves as one piece. Soldering and brazing use heat too, but they melt only a separate filler metal while the base metals remain solid, so they don’t truly fuse the metals. Riveting joins parts by mechanically fastening a rivet, with no melting involved.