Red Seal Welder Practice Exam 2025 - Free Red Seal Welder Practice Questions and Study Guide

Arc blow refers specifically to the deflection of the welding arc caused by magnetic fields. This phenomenon occurs when the electric arc is influenced by external magnetic forces, which can arise from the magnetic fields created by nearby equipment, power sources, or even the workpiece itself.

When this deflection occurs, it can lead to issues such as an inconsistent arc, difficulty maintaining a steady weld, or even defects in the weld bead, as the arc may not stay centered over the joint. Understanding arc blow is significant for welders, as it can affect the quality of the weld and necessitate adjustments to the welding technique or setup to mitigate its effects.

The other options involve different aspects of welding processes but do not specifically relate to the impact of magnetic fields on the arc. Distortion of weld metal refers more to the heat and mechanical stresses during welding, interruption of the welding current indicates a power supply issue, and failure of the electrode to establish an arc would result from other factors unrelated to magnetic influences.