Name three common brazed joint configurations.

• A. Butt, lap, and fillet joints.
• B. Tee, cross, and corner joints.
• C. Butt, lap, and gusset joints.
• D. Lap, tee, and fillet joints.

Answer: (C)

Common brazed joint configurations are butt, lap, and fillet joints. A butt joint forms when the ends of two pieces meet end-to-end and the filler metal flows into the gap to bond them. A lap joint overlaps the pieces, increasing the brazing surface and often improving strength through more contact area. A fillet joint happens at an intersection of pieces at right angles or other angles, with a fillet of filler metal filling the corner and creating a strong, continuous bond along the two surfaces.

These three appear most frequently in practice because they cover a wide range of parts (sheet metal, tubing, structural members), take advantage of capillary action for even filler flow, and are straightforward to prepare. Other configurations like tee, cross, corner, or gusset arrangements are used in specialized situations or as reinforcement, but they’re not typically counted as the standard three common brazed joint types.