Which type of line is characterized by alternating long and short dashes?

The type of line characterized by alternating long and short dashes is the centerline. Centerlines are typically used in technical drawings and blueprints to indicate the center of an object or component. They help convey where symmetry exists and guide the construction or fabrication of parts. This is particularly important in aviation, where precise alignments are crucial for structural integrity and functionality.

Hidden lines, on the other hand, are represented by short dashed lines and indicate edges or outlines that are not visible from the current viewpoint. Extension lines are solid lines used to indicate the extent of a dimension, while break lines are drawn to show that a portion of an object has been removed for clarity, often depicted with a jagged line instead. Understanding these distinctions is vital for accurately interpreting technical drawings in the aviation field.