What type of line is used to represent dimensions in engineering drawings?

In engineering drawings, dimension lines are specifically designed to indicate the measurements of objects. These lines are typically drawn as thin solid lines, which run parallel or at an angle to the dimension they are describing, with arrows at both ends. The arrows point to the feature being measured and indicate the extent of the dimension.

Dimension lines serve a crucial purpose by providing clear, precise information about the size and location of features within a drawing, which is essential for fabrication, construction, and assembly. They often accompany numerical values that specify the exact measurement, ensuring that anyone reading the drawing can understand the intended dimensions accurately.

Hidden lines are used to represent edges or outlines that are not visible in a particular view, center lines are employed to indicate symmetry or centers of circles and arcs, and construction lines are guidelines to assist in the layout of the drawing and are not intended to represent features of the actual object. Each of these line types has its distinct role and does not serve the purpose of dimensioning as effectively as dimension lines do.