If the voltage setting is changed while amperage remains consistent, what welding parameter is primarily affected?

• A. Arc length and bead shape
• B. Shielding gas flow
• C. Weld travel speed
• D. Joint fit-up

Answer: (A)

Voltage sets how long the arc is. When amperage stays the same, changing voltage mainly changes arc length, which directly alters the bead’s shape. A higher voltage lengthens the arc, spreading heat over a longer gap and producing a wider, flatter bead. Lower voltage shortens the arc, giving a narrower, more tapered bead. Shielding gas flow, travel speed, and joint fit-up aren’t controlled by voltage in the same direct way, so they don’t define this change.