Which factor is explicitly cited as determining MIG wire feed speed?

• A. Shielding gas flow
• B. Material thickness and voltage settings
• C. Wire diameter
• D. Electrode angle

Answer: (B)

In MIG welding, the wire feed speed is the setting that controls how much filler metal is delivered to the arc, and it must be chosen to achieve the right current for the job. The amount of current needed depends primarily on how thick the material is and the voltage setting you choose. Heavier material requires more current, so you feed the wire faster to maintain that current; the voltage setting also influences the arc and current level, so the feed is adjusted accordingly. That’s why material thickness and voltage settings are the factors cited as determining MIG wire feed speed. Shielding gas flow affects shielding, not metal delivery; wire diameter and electrode angle influence deposition rate and bead shape but aren’t the explicit determinants of the feed speed.