The visible features of a part are represented by which type of lines in technical drawings?

Visible lines are used in technical drawings to represent the edges and outlines of parts that are directly observable. This type of line is solid and continuous, making it clear and straightforward for anyone interpreting the drawing to understand the exact shape and contours of an object. Visible lines are fundamental in technical illustrations because they convey essential details that need to be highlighted to the viewer, such as boundaries, profiles, and other prominent features.

On the other hand, phantom lines are primarily used to indicate alternate positions or movements and are often depicted as a series of long and short dashes. Construction lines serve as guidelines for other elements in the drawing and are typically lighter and less noticeable, used mainly for layout purposes. Hidden lines represent edges and features not visible from a specific viewpoint, often depicted as dashed lines to indicate obscured parts of the object. Understanding the function of different line types is crucial for correctly interpreting and producing technical drawings.