Describe the back-step and weave techniques in TIG welding and when to apply each.

• A. Weave is used to reduce heat buildup in long welds.
• B. Back-step reduces heat buildup in long welds; weave covers a larger area for filler deposition, and is used for wider joints; use back-step for large horizontal welds, weave for wider welds.
• C. Back-step only for vertical welds.
• D. There is no difference between back-step and weave.

Answer: (B)