Visual Testing (VT) Practice Exam

How does a convex weld surface appear?

1. curves inward

2. curves outward

3. contains a hollow

4. does both a and c

The correct answer is: curves outward

A convex weld surface appears as a surface that curves outward. This characteristic is important in welding, as the convex shape can enhance the strength and durability of the weld joint. When welding, achieving a convex surface often indicates that the filler material has been applied effectively and has formed a solid, well-shaped bead. This outward curve also helps in preventing the accumulation of defects that could weaken the joint, as well as ensuring good fusion with the base metals. Thus, the appearance of a convex surface is a desirable outcome in many welding applications, signifying quality and robustness in the weld.