Final answer:
A tack weld is a temporary weld made to hold parts of a weld in proper alignment until the final welds are made.
Step-by-step explanation:
A weld made to hold parts of a weld in proper alignment until the final welds are made is known as a tack weld.
Tack welds are temporary welds that are used to hold the pieces together until the final welding process is completed. They provide stability and prevent movement or misalignment during the final welding.
For example, when joining two metal plates together, a tack weld can be used to temporarily hold the plates in place before making the final welds along the entire length of the joint. This ensures accurate alignment and reduces the risk of distortion or warping.