Which type of riveting is characterized by visible dimples?

The type of riveting characterized by visible dimples is solid riveting. In solid rivets, when the rivet is deformed during the riveting process, it creates a distinct impression or dimple on the surface of the material. This dimple indicates that the rivet has been properly set and contributes to the rivet's strength and integrity in joining materials.

Solid rivets are traditionally used in aircraft structures, where the strength and reliability of the joint are paramount. The dimples are often visible on the outer surface, serving not only a functional purpose but also allowing for visual inspection of the riveting work.

While other types of riveting exist, such as blind riveting and countersunk riveting, they typically do not exhibit the same visible dimples when installed. Blind rivets, for instance, are designed for applications where only one side of the workpiece is accessible, and they have a different installation method not resulting in dimples on the surface. Countersunk rivets, which are installed flush with the surface, also minimize visible features that could affect aerodynamics or aesthetics. Structural riveting generally refers to the process without focusing on specific visual characteristics like dimpling.