What type of line indicates alternate positions of parts or repeated detail?

• A. Medium dashed lines
• B. Heavy solid lines
• C. Thin solid lines
• D. Phantom lines

Answer: (A)

The type of line that indicates alternate positions of parts or repeated detail is represented by phantom lines. These lines are typically composed of a series of long and short dashes, and are specifically used in technical drawings to show features that are not present in the current view or to indicate the different positions or movements of components. Their unique pattern distinguishes them from other line types, which serve different purposes in the interpretation of schematic and structural drawings.

In technical illustrations, heavy solid lines usually represent visible edges or outlines of objects, while thin solid lines are often utilized for dimensioning and detailing within the drawing. Medium dashed lines may denote hidden lines or features that are not visible in the current view. Understanding these distinctions is crucial for accurately interpreting engineering drawings and effectively communicating design specifications.