In GTAW, the torch functions as an electrode holder, a conduit for shielding gas and coolant, and a conductor for what?

• A. Welding current
• B. Filler metal
• C. Shielding gas only
• D. Electric arc magnetism

Answer: (A)

In GTAW, the torch must complete the electrical circuit that creates the arc. The non‑consumable tungsten electrode is held in the torch and serves as the point through which welding current flows from the power supply to form the arc with the workpiece. This current heats the metal to weld it. While shielding gas and coolant lines run through the torch to protect and cool, they do not carry the welding current as the primary purpose. Filler metal, if used, is fed separately, not carried as current through the torch. Electric arc magnetism isn’t the function described here. So the torch is a conductor for the welding current.