In which type of joint configuration are the edges of two pieces aligned along the same plane?

The correct answer for the type of joint configuration where the edges of two pieces are aligned along the same plane is the butt joint. In a butt joint, two workpieces are positioned so that their edges are flush with each other, forming a continuous surface that is joined together at the ends. This configuration allows for a strong weld and is widely used in structural applications, fabrication, and various welding processes, including GMAW.

Edge joints, on the other hand, involve two pieces that are placed side by side, where the edges are not aligned in the same plane, but instead are positioned for joining at their corresponding edges, often at an angle. This distinction makes butt joints ideal for applications where a flat surface is desired.

Understanding the differences between joint types is crucial for determining the appropriate welding technique and ensuring structural integrity in welding projects.