What is the primary use of a cutting electrode in arc cutting?

The primary use of a cutting electrode in arc cutting is to sever or remove metal by melting. In the process of arc cutting, the electrode generates a high-temperature arc that creates enough heat to melt the metal being cut. This molten metal is then removed from the cut area, effectively separating the material. This technique is widely used in various applications, such as metal fabrication and repair, due to its efficiency and precision in cutting various types of metals.

The other options do not accurately represent the primary function of a cutting electrode. Controlling the cooling of the weld, aiding in the feeding of filler material, and creating a protective gas shield around the weld are tasks that relate more to welding processes rather than to cutting. The focus of a cutting electrode is specifically on the action of melting and removing material, which makes its role distinct from those functions.