GMAW Welding Level 2 Practice Test

The main idea is that heat input and the direction of molten metal, governed by travel speed and the angles of the torch and workpiece, shape the bead and control spatter. If you move the torch slowly, more heat is delivered per unit length, which widens the molten pool and increases penetration. That often makes the bead wider and less predictable, with a higher chance of spatter if the puddle becomes unstable. Conversely, moving too quickly lowers heat input, giving a narrower bead with shallower penetration and typically smoother deposition, but it can lead to underfilled joints if pushed too far.

The torch angle determines how the molten metal is directed into the joint. An improper angle can push metal away from the joint or cause excessive deposition in one area, producing an irregular bead and more spatter as the arc becomes unstable. A well-chosen angle helps produce a uniform bead and consistent penetration.

The work angle—the orientation of the workpiece relative to the weld axis—affects how the pool flows along the joint. If this angle is off, the bead can tilt or weave improperly, again increasing spatter and creating an uneven bead.

So travel speed, torch angle, and work angle all influence heat distribution and flow of the molten metal, which in turn governs bead shape, penetration, and spatter.