Which tungsten preparation would be selected for welding with EWTh-2?

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Prepare for the Gas Tungsten Arc Welding (GTAW) exam. Test your knowledge with multiple-choice and flashcard questions with hints and explanations to boost your confidence. Get ready to succeed!

Multiple Choice

Which tungsten preparation would be selected for welding with EWTh-2?

Explanation:
A pointed, conical tip is preferred for EWTh-2 in DC GTAW because a sharp point concentrates the current and arc at a small area. This focuses heat where you want it, gives a stable, easily controllable arc, and minimizes electrode wear under high DC current. The other shapes are more suited to different conditions: a balled tip is common for AC welding (to help arc stability with alternating polarity), while flat or rounded ends spread the current over a larger area and reduce arc control for high-current DC welding with thoriated tungsten.

A pointed, conical tip is preferred for EWTh-2 in DC GTAW because a sharp point concentrates the current and arc at a small area. This focuses heat where you want it, gives a stable, easily controllable arc, and minimizes electrode wear under high DC current. The other shapes are more suited to different conditions: a balled tip is common for AC welding (to help arc stability with alternating polarity), while flat or rounded ends spread the current over a larger area and reduce arc control for high-current DC welding with thoriated tungsten.

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