In GTAW, which polarity concentrates heat in the electrode and is typically chosen for higher deposition and certain alloys or thin sections?

• A. DCEN (electrode negative) concentrates heat in the workpiece.
• B. DCEP (electrode positive) concentrates heat in the electrode; use for higher deposition and certain alloys or thin sections as specified by the procedure.
• C. AC concentrates heat evenly; use for aluminum.
• D. DC current with no polarity differences; not used in welding.

Answer: (B)