SkillsUSA Welding Practice Test 2025 - Free Welding Practice Questions and Study Guide

The type of weld joint typically used for joining two pieces of metal at right angles is the fillet joint. This joint is specifically designed to accommodate two pieces of metal that intersect, commonly forming a corner or a T-shape when viewed in profile. The fillet weld is applied along the joint’s edges, effectively creating a reinforced connection that is capable of bearing stress in multiple directions.

Fillet welds are particularly advantageous in situations where metals come together at 90 degrees, making them a popular choice in structural applications, such as in the fabrication of frames, brackets, and other components where strength and stability at joints are crucial. The geometry of a fillet weld allows for good penetration and fusion between the adjacent metal surfaces while also being relatively easy to execute using various welding processes, including MIG, TIG, and stick welding.

Other joint types, such as butt joints and tee joints, serve different purposes. For example, butt joints are best suited for aligning and welding metal pieces edge-to-edge in a flat plane, while tee joints are formed when one piece is perpendicular to the other, which does not always allow for the same level of coverage and strength provided by a properly executed fillet weld. Edge joints are used to join two edges of workpieces