A disk grinder is used to direct sparks into the weld.

• A. Yes
• B. No
• C. Sometimes
• D. Not at all

Answer: (B)

Directing sparks from a disk grinder into the weld is not a safe or acceptable practice. A grinder throws hot metal particles that can contaminate or damage the weld, cause porosity or inclusions, and may ignite flammable materials nearby. It also increases the risk of burns to the welder and bystanders. The grinder is used for prep and cleanup around the joint, not as a tool to influence the weld bead with sparks. So, never direct sparks into the weld; keep grinding away from the weld zone and remove slag or spatter after welding with controlled technique.