In what sizes does the torch cap typically come?

The correct choice indicates that torch caps come in sizes referred to as long, medium, and button. This classification directly correlates with the different applications and requirements in welding processes when utilizing GTAW (Gas Tungsten Arc Welding) torches.

Long caps are beneficial for applications requiring deeper penetration or extended reach into weld joints, while medium caps provide a balance suitable for a variety of welding tasks. Button caps, which are shorter, are ideal for creating more focused arcs and are often used in situations where access is limited or precision is crucial.

Understanding these specific sizes is essential for welders to select the appropriate cap according to the job's demands, ensuring optimal performance and quality of the welds. Proper selection can affect the heat concentration, shielding gas coverage, and overall efficiency of the welding operation.