Final answer:
The weld pool in welding refers to the molten metal formed during the welding process. The size and shape of the weld pool can indicate the penetration being obtained. Visual inspection or non-destructive testing methods can be used to determine the depth and quality of the penetration.
Step-by-step explanation:
The weld pool in welding refers to the molten metal that is formed during the welding process. The penetration of the weld pool refers to how deep the weld metal extends into the base metal.
The size and shape of the weld pool can indicate the penetration being obtained. For example, a wider and flatter weld pool generally indicates shallow penetration, while a narrower and deeper weld pool suggests deeper penetration.
Furthermore, the weld pool can be inspected visually or with non-destructive testing methods to determine the quality and depth of the penetration achieved.