In a blueprint, what does a dashed line typically indicate?

In a blueprint, what does a dashed line typically indicate?

• A. A centerline.
• B. A dimension revision.
• C. A boundary line.
• D. Hidden or not-visible features such as concealed wiring or structures.

Answer: (D)

Dashed lines on blueprints indicate features that are hidden from view in the current perspective, such as concealed wiring, pipes, or structural elements behind surfaces. This convention helps you understand what exists beyond what you can see directly in the drawing. Centerlines use a pattern of alternating long and short dashes to mark the center of symmetric features, so they’re not the same as general hidden lines. Boundary lines are typically solid, showing the limits of a property or area. Revisions are usually noted with revision clouds or notes near the affected area, not simply with dashed lines. So the dashed line best matches hidden or not-visible features.

Dashed lines on blueprints indicate features that are hidden from view in the current perspective, such as concealed wiring, pipes, or structural elements behind surfaces. This convention helps you understand what exists beyond what you can see directly in the drawing.

Centerlines use a pattern of alternating long and short dashes to mark the center of symmetric features, so they’re not the same as general hidden lines. Boundary lines are typically solid, showing the limits of a property or area. Revisions are usually noted with revision clouds or notes near the affected area, not simply with dashed lines.

So the dashed line best matches hidden or not-visible features.