What type of visual indication is typically associated with a forging lap?

A forging lap is a type of defect that occurs in forged materials where one layer of metal laps over another, creating a joint that isn't properly fused. This defect often appears as a continuous line on the surface of the material.

The reason that a continuous line is the correct visual indication for a forging lap lies in the nature of how the defect forms during the forging process. When two surfaces of metal come together but do not bond correctly, they create a uniform visual representation that can be identified during a visual inspection.

Other types of indications, such as nearly round or cluster indications, typically represent different defects or conditions in materials, while a continuous line specifically denotes the improper joining of surfaces characteristic of a forging lap.