NCCER Millwright Practice Exam

What type of line may be present in an orthographic drawing?

1. Dashed line

2. Curved line

3. Solid line

4. Dotted line

The correct answer is: Dashed line

In an orthographic drawing, various types of lines are used to convey different information, and one of these types is the dashed line. Dashed lines typically represent features that are not visible in the current view, such as hidden edges or contours. This allows the viewer to understand the complete shape and details of a complex object by indicating elements located behind or inside the visible surfaces. While curved lines and solid lines are also features found in orthographic drawings, they serve different purposes. Solid lines generally depict visible edges and outlines of the objects, while curved lines can be used to illustrate connections or curves that are part of the design. Dotted lines, similar to dashed lines, may be used to indicate other types of information, such as centerlines. However, for representing hidden details specifically, dashed lines are the correct choice in the context of orthographic representations.