When welding aluminum in the vertical or overhead position, what technique changes are recommended?

• A. Use a shorter arc length, slower travel speed, and appropriate heat control; maintain continuous shielding and a stable puddle; use a slight back-and-forth motion to control the weld pool.
• B. Use longer arc length and faster travel speed.
• C. Use reverse polarity exclusively.
• D. Always use DC only.

Answer: (A)