Which non-torch heating method can be used in brazing?

• A. Vacuum furnaces for controlled atmosphere brazing
• B. Induction brazing
• C. Laser cutting
• D. Oxy-fuel torch

Answer: (B)

Induction brazing uses electromagnetic induction to heat the metal parts directly at the joint, so the braze filler can melt precisely where needed while the surrounding areas stay cooler. This non-contact, highly controllable heating method provides rapid, localized heat input, which is ideal for forming a clean, capillary-filled joint without an open flame. It works well in air or in a controlled atmosphere, and it’s especially advantageous for small parts, complex geometries, or assemblies with dissimilar metals. The other options either involve heating the whole assembly in a furnace (a non-torch approach but not as selective) or rely on a flame (which is torch-based) or are not brazing methods at all (laser cutting).