Red Seal Welding Practice Exam

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What current and polarity should be used for stud welding?

  1. AC

  2. DCEP

  3. DCEN

  4. Variable polarity

The correct answer is: DCEN

Stud welding requires the use of DCEN (direct current, electrode negative) polarity because it produces a more stable arc and allows for better control of the molten metal. AC (alternating current) is not suitable for stud welding as the constantly changing current can lead to an unstable arc and weld quality. DCEP (direct current, electrode positive) is not recommended as it can cause excessive spatter and produce a weaker weld. Variable polarity is not a suitable option as it allows for an inconsistent weld and can lead to weld failure. DCEN is the optimal choice for stud welding as it provides a stable and controllable arc and produces a strong and reliable weld.

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