What line is drawn to indicate the location of the imaginary section plane in a drawing?

The term "Cutting Plane Line" is used to describe a specific line drawn on technical drawings to indicate where an imaginary section plane has been placed to create a sectional view. This line is typically represented as a long dash followed by short dashes and is crucial for guiding the viewer on how to visualize the internal features of an object being illustrated.

This type of line essentially directs the viewer to understand what would be seen if the object were cut along that specified plane. It's instrumental in providing clarity regarding the internal structure without the need for excessive detail in the main view.

The other line types mentioned serve different purposes. A Section Line, for example, is used within the sectioned area to indicate the materials and features of those internal surfaces. A Phantom Line represents objects that are adjacent or related but not directly involved in the current drawing view. Meanwhile, a Break Line indicates that a portion of the object has been omitted to fit the drawing layout more effectively. Each of these serves distinct functions, but the Cutting Plane Line specifically denotes where the imaginary cut occurs, making it the correct answer in this context.