In DCEN, which tip concentrates the arc as much as possible?

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Prepare for the GTAW Advanced Welding Exam. Use flashcards and multiple choice questions, each with hints and detailed explanations. Excel in the exam!

Multiple Choice

In DCEN, which tip concentrates the arc as much as possible?

Explanation:
In DCEN, a pointed tungsten tip concentrates the arc because the electrode is negative, so the current density is highest at the apex. The sharp point creates a highly intensified electric field there, pulling the arc into a narrow, focused column of plasma and heat right at the tip as it transfers to the workpiece. A rounded, blunt, or flat tip spreads the current over a wider area, resulting in a broader, less focused arc with less precise control and penetration. So, a pointed tip provides the most concentrated arc under DCEN.

In DCEN, a pointed tungsten tip concentrates the arc because the electrode is negative, so the current density is highest at the apex. The sharp point creates a highly intensified electric field there, pulling the arc into a narrow, focused column of plasma and heat right at the tip as it transfers to the workpiece. A rounded, blunt, or flat tip spreads the current over a wider area, resulting in a broader, less focused arc with less precise control and penetration. So, a pointed tip provides the most concentrated arc under DCEN.

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