What type of equipment is necessary for GTAW setup?

The selection that includes a welding machine, TIG torch, gas supply, and workpiece holder is the only appropriate combination for a proper Gas Tungsten Arc Welding (GTAW) setup. Each element in this combination plays a critical role in the GTAW process.

The welding machine provides the required power to create the arc between the tungsten electrode and the workpiece. The TIG torch is essential for the GTAW process, as it holds the tungsten electrode and allows for the controlled delivery of shielding gas to protect the weld pool from atmospheric contamination. The gas supply is crucial because it provides the inert gas, typically argon or helium, which shields the weld from oxidation and enhances the quality of the weld. Lastly, a workpiece holder or fixture ensures that the material being welded is stable and properly positioned during the welding operation, facilitating better control and precision.

In contrast, the other combinations listed include equipment that is not relevant or necessary for a GTAW setup. For instance, MIG torches and stick torches are designed for different welding processes, while a plasma cutter would not be used in GTAW, which focuses on melting two materials together rather than cutting them. Thus, the correct combination, encompassing all required elements for the GTAW process, establishes a