When performing plasma arc cutting on a 6 mm stainless steel sheet, a welder notices that the cut edge is severely bevelled and inconsistent, resembling a 'V' shape rather than a square edge. What is the most likely cause of this issue?

Question: When performing plasma arc cutting on a 6 mm stainless steel sheet, a welder notices that the cut edge is severely bevelled and inconsistent, resembling a 'V' shape rather than a square edge. What is the most likely cause of this issue?

Answer options:

• The travel speed is too slow, causing excessive melting and dross. ✅ The standoff distance is too great, causing arc wander.
• The amperage setting is too low for the material thickness.
• The cutting torch is angled excessively, causing an irregular kerf.

Correct answer: The standoff distance is too great, causing arc wander.

Explanation: An excessive standoff distance between the torch and the workpiece can cause the plasma arc to expand and become less concentrated, leading to a beveled or 'V' shaped cut edge. Too slow a travel speed would typically result in excessive dross and a wider kerf, but not necessarily a severe bevel.