Explain why the tungsten electrode in GTAW is referred to as non-consumable.

The tungsten electrode is non-consumable because it doesn't melt and become part of the weld; it only serves to create the arc.

What is the purpose of the collet and collet body in a TIG torch?

The collet and collet body hold the tungsten electrode securely in the TIG torch.

DCEN, because it puts more heat on the workpiece.

AC is used to break up the aluminum oxides that form on the surface, which helps to create a cleaner weld.

I can identify the components of GTAW equipment and select appropriate supplies for a given welding task.

1
TIG welding, also known as GTAW or gas tungsten arc welding, uses a tungsten electrode that doesn't melt during the welding process.
2
In DC TIG welding, the electrode is typically negative and the workpiece is positive, a setup referred to as DCEN.
3
When TIG welding, a shielding gas, such as argon, protects the molten metal from reacting with elements like oxygen and water vapor.