Which shielding gas nozzle type is typically used with the short-circuit transfer method?

Which shielding gas nozzle type is typically used with the short-circuit transfer method?

• A. Straight
• B. Bulged
• C. Tapered
• D. Curved

Answer: (C)

Shielding gas delivery must be tightly focused around the arc and weld pool when using short-circuit transfer, which involves rapid contact and separation events. A tapered nozzle narrows toward the tip, delivering shielding gas in a concentrated envelope right where the arc and puddle are constantly changing. That focused flow helps maintain consistent coverage and prevents porosity during the frequent arc interruptions. In contrast, straight or bulged nozzles tend to release gas more broadly and less precisely, and curved shapes can misdirect the flow, reducing protection exactly when the arc is flicking on and off. So the tapered nozzle best supports the needs of short-circuit transfer.

Shielding gas delivery must be tightly focused around the arc and weld pool when using short-circuit transfer, which involves rapid contact and separation events. A tapered nozzle narrows toward the tip, delivering shielding gas in a concentrated envelope right where the arc and puddle are constantly changing. That focused flow helps maintain consistent coverage and prevents porosity during the frequent arc interruptions. In contrast, straight or bulged nozzles tend to release gas more broadly and less precisely, and curved shapes can misdirect the flow, reducing protection exactly when the arc is flicking on and off. So the tapered nozzle best supports the needs of short-circuit transfer.