Which statement about weld bead sizes is supported by the material?

Which statement about weld bead sizes is supported by the material?

• A. Downdraft method results in larger uphill beads
• B. Uphill beads cannot be larger
• C. Uphill beads can be larger than downhill beads
• D. Beads are always the same size

Answer: (C)

Bead size is shaped by how much heat you put into the joint and how the molten metal flows and solidifies. In uphill welding, you typically deliver more heat per unit length (often by moving more slowly and maintaining a stable arc), which gives the molten pool more time to flow outward and spread before it hardens. That extra flow and heat input can produce a larger bead. In downhill welding, the arc has less time to heat and spread the metal, so the bead tends to be smaller. So it’s consistent with the material to say uphill beads can be larger than downhill beads. The other statements don’t align with how heat input and pool dynamics determine bead size.

Bead size is shaped by how much heat you put into the joint and how the molten metal flows and solidifies. In uphill welding, you typically deliver more heat per unit length (often by moving more slowly and maintaining a stable arc), which gives the molten pool more time to flow outward and spread before it hardens. That extra flow and heat input can produce a larger bead. In downhill welding, the arc has less time to heat and spread the metal, so the bead tends to be smaller. So it’s consistent with the material to say uphill beads can be larger than downhill beads. The other statements don’t align with how heat input and pool dynamics determine bead size.