Question

Why is carbon used in carbon arc welding?

(a) Generation of more heat at electrode tip

(b) Generation of less heat at electrode tip

(c) Provides coating

(d) Fixed polarity is maintained

I got this question during an interview.

My query is from Arc Welding Methods in portion Welding and Related Processes of Casting-Forming-Welding II

Answer 1

The correct answer is:

(a) Generation of more heat at electrode tip

In carbon arc welding, carbon is used as the electrode material because it has a high melting point and provides a stable arc. The carbon electrode generates a significant amount of heat at the electrode tip, which is essential for melting the base material and creating a strong weld. The high temperature generated by the arc between the carbon electrode and the workpiece helps to melt the work material efficiently during the welding process.