In the GMAW short-circuiting transfer mode, metal is transferred:

In the GMAW short-circuiting transfer mode, metal is transferred:

• A. When the electrode comes in contact with the weld pool
• B. As large globules released from the filler wire
• C. As fine droplets moving axially across the open arc
• D. When a high current arc pulse ejects metal from the filler wire

Answer: (A)

In short-circuit transfer, metal is deposited by actual contact between the electrode and the weld pool, creating a brief short circuit. When the wire touches the pool, a small amount of molten metal forms a tiny droplet at the tip. As the arch length remains short and the circuit reestablishes, that droplet transfers into the weld pool and the process repeats rapidly. This mode uses low voltage and low current, which favors controlled, low-heat deposition and good short-circuit stability on thin materials. The other descriptions describe different transfer modes: large globules are characteristic of globular transfer, fine droplets moving across an open arc describe spray transfer, and metal ejected by a high current arc pulse corresponds to pulsed or spray-type transfer.

In short-circuit transfer, metal is deposited by actual contact between the electrode and the weld pool, creating a brief short circuit. When the wire touches the pool, a small amount of molten metal forms a tiny droplet at the tip. As the arch length remains short and the circuit reestablishes, that droplet transfers into the weld pool and the process repeats rapidly. This mode uses low voltage and low current, which favors controlled, low-heat deposition and good short-circuit stability on thin materials.

The other descriptions describe different transfer modes: large globules are characteristic of globular transfer, fine droplets moving across an open arc describe spray transfer, and metal ejected by a high current arc pulse corresponds to pulsed or spray-type transfer.