Which line type represents an edge that is not directly visible?

Which line type represents an edge that is not directly visible?

• A. Center Line
• B. Hidden Line
• C. Dimension Line
• D. Leader Line

Answer: (B)

This question tests how line types communicate visibility of edges in technical drawings. In such drawings, edges that aren’t seen from the current view are shown with hidden lines, a dashed line pattern that indicates something behind or obscured by another surface. This helps convey the full shape without turning the view. The other line types have different roles: center lines mark axes of symmetry or feature centers, dimension lines show measured distances (often with arrows), and leader lines connect notes or callouts to a specific feature. Since the edge in question isn’t directly visible, the hidden line is the correct representation.

This question tests how line types communicate visibility of edges in technical drawings. In such drawings, edges that aren’t seen from the current view are shown with hidden lines, a dashed line pattern that indicates something behind or obscured by another surface. This helps convey the full shape without turning the view.

The other line types have different roles: center lines mark axes of symmetry or feature centers, dimension lines show measured distances (often with arrows), and leader lines connect notes or callouts to a specific feature. Since the edge in question isn’t directly visible, the hidden line is the correct representation.