Which statement best links STT to a transfer type?

• A. Short circuit transfer
• B. Spray transfer
• C. Globular transfer
• D. Pulsed transfer

Answer: (A)

STT stands for Surface Tension Transfer, which is a refined form of metal transfer used in MIG welding. It keeps the arc in a short-circuit regime, but the droplet detachment is controlled by surface tension at the molten tip. This means each little droplet is formed and released during brief short-circuit events in a predictable, stable way, producing small, clean drops with less spatter. That direct relationship to short-circuit transfer is why it’s best linked with short circuit transfer rather than spray, globular, or pulsed transfer. Spray transfer involves many small droplets at high current in a steady spray, globular transfer uses large irregular droplets, and pulsed transfer is a broader mode that cycles current to manage heat— STT is essentially a controlled short-circuit method driven by surface tension.