In GTAW, the arc flows from what type of electrode?

In GTAW, the arc flows from what type of electrode?

• A. Non-consumable electrode
• B. Consumable electrode
• C. Workpiece
• D. Filler metal

Answer: (A)

The arc in GTAW is produced by a non-consumable electrode. A tungsten electrode carries the welding current and forms the arc to the workpiece, but it does not melt away during welding. That means the electrode remains intact throughout the process and is not consumed as part of the weld. If filler metal is needed, it is fed separately into the molten pool, not as part of the arc current. This is what distinguishes GTAW from processes that use consumable electrodes, where the electrode itself melts and becomes part of the weld.

The arc in GTAW is produced by a non-consumable electrode. A tungsten electrode carries the welding current and forms the arc to the workpiece, but it does not melt away during welding. That means the electrode remains intact throughout the process and is not consumed as part of the weld. If filler metal is needed, it is fed separately into the molten pool, not as part of the arc current. This is what distinguishes GTAW from processes that use consumable electrodes, where the electrode itself melts and becomes part of the weld.