In GTAW, what factors influence penetration depth and how can you tailor technique to adjust depth?

• A. Arc length, current, travel speed, and filler metal addition; shorter arc length and higher current increase depth; slower travel increases penetration; adjust wire size and position accordingly.
• B. Penetration is only affected by filler metal type.
• C. Arc length does not influence depth.
• D. Travel speed has no effect on penetration.

Answer: (D)