Which line type is NOT typically used to represent real objects in technical drawings?

In technical drawings, various line types serve specific purposes, and understanding these helps in interpreting the drawings correctly. The correct answer here is that a dashed line is not typically used to represent real objects. This line type is usually employed to indicate hidden details or features of an object that cannot be seen from the current viewpoint. For example, if a part of a component is obscured by another part, the hidden detail is shown with a dashed line.

On the other hand, solid lines are used to represent the visible edges and contours of real objects, making them fundamental for clearly portraying the main features of a design. Centerlines are crucial for indicating symmetry and the center of circular shapes, while leader lines are employed to connect notes and annotations to specific features on a drawing. Each of these line types plays an essential role in conveying different information; hence, the dashed line's function is distinctly separate, specifically serving to provide clarity about features that aren’t immediately visible.