Q.The purpose of coating on arc welding electrodes is to

  • AStabilize the arc
  • BProvide a protecting atmosphere 
  • CProvide slag to protect the molten metal
  • DAll of the above
Correct Answer : (D)

All of the above

Hints :

The purpose of coating on arc welding electrodes is to 1. Stabilize the arc 2. Provide a protecting atmosphere 3. Provide slag to protect the molten metal.

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