List the five joint types used in welding.
1. Butt Joint: This is the most common joint type used in welding, where two metal pieces are aligned and welded along their edges or ends.
2. Lap Joint: In this joint, one metal piece overlaps another, and the welding is done along the overlapping area.
3. T-Joint: This joint is formed by placing one metal piece perpendicularly on top of another, creating the shape of a "T."
4. Corner Joint: As the name suggests, this joint is created when two metal pieces meet at a corner and are welded together.
5. Edge Joint: In this joint type, the welding is done along the edge of two metal pieces that are positioned parallel to each other.