The majority of SMAW welding is performed using which two polarities?

The majority of SMAW welding is performed using which two polarities?

• A. DC+ and AC
• B. DC- and AC
• C. AC and CC
• D. DC+ and DC-

Answer: (A)

The majority of Shielded Metal Arc Welding (SMAW) is indeed performed using direct current positive (DC+) and alternating current (AC) polarities. DC+ is often preferred for most welding operations because it provides a more stable arc and is better suited for welding with certain electrodes, particularly when using low hydrogen electrodes. This results in enhanced weld quality and penetration. Alternating current (AC) is also popular in SMAW, especially when welding thicker materials or when working with non-ferrous metals like aluminum. The ability of AC to frequently change polarity helps in cleaning oxide layers and enhances arc stability. While DC- is sometimes used, particularly in specific applications or with certain types of electrodes, it’s less common in general SMAW practice. Thus, the combination of DC+ and AC represents the polarity options typically utilized in standard welding tasks, highlighting their effectiveness in ensuring overall better welding outcomes.

The majority of Shielded Metal Arc Welding (SMAW) is indeed performed using direct current positive (DC+) and alternating current (AC) polarities. DC+ is often preferred for most welding operations because it provides a more stable arc and is better suited for welding with certain electrodes, particularly when using low hydrogen electrodes. This results in enhanced weld quality and penetration.

Alternating current (AC) is also popular in SMAW, especially when welding thicker materials or when working with non-ferrous metals like aluminum. The ability of AC to frequently change polarity helps in cleaning oxide layers and enhances arc stability.

While DC- is sometimes used, particularly in specific applications or with certain types of electrodes, it’s less common in general SMAW practice. Thus, the combination of DC+ and AC represents the polarity options typically utilized in standard welding tasks, highlighting their effectiveness in ensuring overall better welding outcomes.