Which process uses a filler metal that melts at a lower temperature to join metal pieces?

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

Answer: (B)

Brazing uses a filler metal that melts at a lower temperature than the base metals, then flows into the joint by capillary action and bonds as it cools without melting the pieces being joined. This creates a strong metal joint while keeping the original parts intact. Soldering also uses a low-melting filler metal, but brazing is distinguished by the level of heat and the way the filler metal wets and bonds the joints, providing stronger connections for many metal assemblies. Welding would melt the base metals themselves, and adhesives rely on glue rather than a filler metal.