During arc welding as the thickness of the metal to be welded increases:

Question

Question

This question was previously asked in

PGCIL Diploma Trainee EE Official Paper held on 14 November 2018

Answer 1

Electric arc welding is the process of joining two metallic pieces by melting metal which is obtained due to the heat developed by an arc struck between an electrode and the metal to be welded or between the two electrodes.
If the thickness of metal increase, the current requirement will increase as the heat requirement to melt the metal increases.
To penetrate thick metal surface arc requires more power, for this purpose it requires more current and constant voltage.