Which line type is used to show an edge that is not visible?

Which line type is used to show an edge that is not visible?

• A. phantom line
• B. hidden line
• C. break line
• D. dash line

Answer: (B)

In technical drawings, edges that cannot be seen in the current view are represented with hidden lines. This line type uses a pattern of short dashes to indicate that the edge exists behind the surface you can see, helping you understand the full shape without showing it directly. The solid, continuous lines you see for visible edges convey what is actually seen, while hidden lines reveal what lies behind or inside. The other line types serve different purposes: phantom lines show features in alternate positions or related parts, break lines are used to shorten long objects in the drawing, and dash lines can have various special meanings depending on the standard. But when you want to communicate an edge that isn’t visible, the appropriate choice is the hidden line.

In technical drawings, edges that cannot be seen in the current view are represented with hidden lines. This line type uses a pattern of short dashes to indicate that the edge exists behind the surface you can see, helping you understand the full shape without showing it directly. The solid, continuous lines you see for visible edges convey what is actually seen, while hidden lines reveal what lies behind or inside.

The other line types serve different purposes: phantom lines show features in alternate positions or related parts, break lines are used to shorten long objects in the drawing, and dash lines can have various special meanings depending on the standard. But when you want to communicate an edge that isn’t visible, the appropriate choice is the hidden line.