What is the purpose of using long and short break lines on drawings?

The purpose of using long and short break lines on drawings is primarily to conserve space on the print. Break lines are used to indicate that a portion of the drawing has been removed to simplify the representation of an object, typically when detailing a long piece where only a section is relevant for a specific view. This technique allows for a more compact and efficient presentation of information by eliminating the need to draw the entire length of an object that is not necessary for understanding its shape or features.

Using break lines thus enhances clarity and readability in technical drawings, ensuring that the relevant details are highlighted without overcrowding the visual space. In this context, the other options do not align with the specific function of break lines in the way that conserving space does. For instance, dimensions are indicated through dimension lines and annotations rather than break lines. Similarly, borders refer to the outline of the drawing area, which is a separate aspect of drafting. Depicting hidden features is accomplished through dashed lines, which serve a different purpose than break lines.