What type of disk may be used to knock high spots off a weld seam?

• A. Cutting disk
• B. Grinding disk
• C. Sanding disk
• D. Flap disk

Answer: (B)

Knocking down high spots on a weld seam requires a disk designed for material removal and shaping. A grinding disk fits that purpose best because it’s built to remove weld material quickly and flatten the bead, helping you achieve a level, flat surface with the surrounding metal when used with an angle grinder. Cutting disks cut through metal and would gouge or over-penetrate; sanding disks are meant for light finishing and wouldn’t remove the excess weld efficiently; flap disks can blend and finish but aren’t as fast for heavy removal as a grinding disk. So, the grinding disk is the right tool for leveling the weld.