AWS Welding Inspection and Testing Certification Practice Test

Which type of fillet weld has equal leg and size dimensions?

1. Equal leg

2. Concave

3. Convex

4. Unequal leg

The correct answer is: Equal leg

An equal leg fillet weld is characterized by having both legs of the weld the same size and dimensions. This means that the thickness and size of the weld along both sides where it joins the base metal are uniform. The use of equal leg fillet welds is often preferred for symmetrical structures and components because they provide consistent strength and performance in tension or shear forces. In contrast, a convex weld would have a bulging appearance on the outer surface, indicating a different profile, and a concave weld would be recessed, impacting the stress distribution and potential strength. An unequal leg fillet weld features legs of different sizes, which could be beneficial in specific applications but does not maintain uniformity. Therefore, the defining characteristic of an equal leg fillet weld lies in its symmetrical measurements, making it suitable for a variety of structural applications where balanced load distribution is crucial.