railway RRB JE (CBT I + CBT II) Mock Test 2024 Production Engineering (Manufacturing) Joining Welding
What does the process of Principle of Arc welding involve?
1
Creating flow of electric current in the air gap between the electrode and the workpiece to melt the metal
2
Supplying oxygen and acetylene between the electrodes to melt the metal
3
Creating a chemical reaction between the electrode and the workpiece to melt the metal
4
Creating friction between the electrode and the workpiece to melt the metal