In a blueprint drawing, which line type most typically represents visible edges and outlines?

• A. Hidden Lines
• B. Dimension Lines
• C. Visible Edges and Outlines
• D. Center Lines

Answer: (C)

Visible edges and outlines are represented by solid, continuous lines. These lines define the actual outer boundary and shape of the object as seen in that view, making the silhouette clear and unambiguous for manufacturing or inspection. Other line types have different roles: hidden lines use dashes to show features not visible in the current view; dimension lines indicate measurements with arrowheads; and center lines use alternating long and short dashes to mark axes or symmetry. Using solid lines for visible edges keeps the primary silhouette obvious and easy to read.