Correct Answer : (C) Electrode is negative with respect to the work if DC is used
Hints :
During carbon arc welding Electrode is negative with respect to the work if DC is used.
Important Points:
- Carbon arc welding is used for welding copper and its alloys.
- In this method, the carbon electrode is used which is kept negative with respect to work if DC supply is used.
- It is because, if the carbon electrode is made positive, the carbon particles have a tendency to go into the welded joint and make it brittle.
- Therefore, the electrode in carbon arc welding is always kept negative and the work positive.