____ is a groove melted into the base metal adjacent to the weld toe or weld root and left unfilled by weld metal.
A) Arc strike
B) Crater crack
C) Cold lap
D) Undercut

Question

Quizplus · Accepted Answer

Undercut is a groove melted into the base metal adjacent to the weld toe or weld root and left unfilled by weld metal. Arc strike is a surface defect caused by discontinuity in an arc welding process. Crater crack is a crack that forms at the end of a weld bead due to the cooling and contraction of the weld metal. Cold lap occurs when the weld metal does not properly fuse with the base metal, resulting in a gap or weak joint.

____ Is a Groove Melted into the Base Metal Adjacent