Which current type is typically used to minimize arc blow in SMAW in many cases?

• A. Direct current (DC)
• B. Pulsed current
• C. Use alternating current (AC)
• D. Constant current (CC)

Answer: (C)

Arc blow is a wandering arc caused by the magnetic field created by the welding current in the workpiece. When you weld with alternating current, the polarity reverses every half-cycle, so the magnetic field around the weld reverses as well. This causes the forces on the arc to change direction rapidly and effectively average out, reducing the net pulling or pushing that would push the arc off the joint. In many SMAW situations, this makes the arc more stable and helps keep it centered, which is why AC is commonly used to minimize arc blow.