Which polarity is used for SMAW?

Which polarity is used for SMAW?

• A. Direct current electrode positive
• B. Direct current electrode negative
• C. Alternating current
• D. Direct current electrode neutral

Answer: (A)

The main idea is how polarity affects heat delivery and arc behavior in SMAW. The usual and most versatile choice is to have the electrode positive with direct current. This setup gives a stable arc and deeper penetration into the base metal, which helps achieve a strong, well-fused weld on common steels. The electrode is consumed more quickly under this polarity, which is expected for stick electrodes. Using the electrode negative with direct current tends to produce a weld with shallower penetration and a different bead shape, which is why it isn’t the default choice for most SMAW tasks. Alternating current can be used, but it doesn’t provide the same consistent arc stability and penetration control as steady DC. The option implying a neutral polarity isn’t a standard SMAW setting.

The main idea is how polarity affects heat delivery and arc behavior in SMAW. The usual and most versatile choice is to have the electrode positive with direct current. This setup gives a stable arc and deeper penetration into the base metal, which helps achieve a strong, well-fused weld on common steels. The electrode is consumed more quickly under this polarity, which is expected for stick electrodes.

Using the electrode negative with direct current tends to produce a weld with shallower penetration and a different bead shape, which is why it isn’t the default choice for most SMAW tasks. Alternating current can be used, but it doesn’t provide the same consistent arc stability and penetration control as steady DC. The option implying a neutral polarity isn’t a standard SMAW setting.