Greater penetration is obtained using which technique?

Greater penetration is obtained using which technique?

• A. Pushing
• B. Pulling
• C. Rotating
• D. Dipping

Answer: (B)

In MIG welding, how you move the gun changes how heat is delivered to the joint. Pulling the torch toward you concentrates the arc into the joint, directing more heat into the base metal. That higher heat input at the root promotes deeper fusion, so you get greater penetration. The bead you get while pulling is typically narrower and taller, reflecting that increased depth. Pushing the gun forward tends to spread heat over a wider surface, producing a flatter, wider bead with less penetration. The other techniques aren’t aimed at increasing root penetration in the same way, so they don’t produce as deep a weld.

In MIG welding, how you move the gun changes how heat is delivered to the joint. Pulling the torch toward you concentrates the arc into the joint, directing more heat into the base metal. That higher heat input at the root promotes deeper fusion, so you get greater penetration. The bead you get while pulling is typically narrower and taller, reflecting that increased depth. Pushing the gun forward tends to spread heat over a wider surface, producing a flatter, wider bead with less penetration. The other techniques aren’t aimed at increasing root penetration in the same way, so they don’t produce as deep a weld.