Which of the following is NOT a cause of undercutting in welding?

Undercutting in welding refers to the erosion of the base material along the weld bead, creating a groove or channel that can weaken the joint. Understanding the factors that cause undercutting is essential for producing strong, reliable welds.

When the amperage is set too low, it typically affects the welding process by not providing sufficient heat to produce a proper weld bead. This insufficient heat can lead to incomplete fusion or poor penetration but isn't usually a direct cause of undercutting. Instead, low amperage more commonly results in weak welds, rather than the specific issue of undercutting itself.

In contrast, improper travel speed, incorrect electrode angle, and excessive heat input are all factors that can lead to undercutting. Improper travel speed can either be too fast or too slow, causing the weld bead to be poorly formed and leading to undercut around the edges. Similarly, an incorrect electrode angle can prevent the molten metal from properly fusing to the base metal, which can also contribute to the undercut. Excessive heat input may lead to overheating the base metal, causing it to melt away from the weld, resulting in undercutting.

Understanding these relationships helps welders make the necessary adjustments to technique and parameters to prevent undercut