What line is represented by "- - - - - - - - -"?

The representation of "- - - - - - - - -" corresponds to a hidden line. In technical drawing and engineering design, hidden lines are used to indicate features that are not visible from the current viewpoint. This specific line style, which consists of short, evenly spaced dashes, effectively conveys that particular edges and outlines exist behind or within other objects in the design, allowing the viewer to understand the full complexity of the component or assembly without cluttering the drawing with unnecessary detail.

The characteristics of a hidden line make it an essential tool in producing clear and informative engineering drawings. By using this line style, designers can ensure that vital information about internal structures is communicated even when those structures are obscured by other elements. This enhances the comprehensibility of the drawing and aids in accurate interpretation and manufacturing of the specified parts.