Which term describes a line that extends forever in two directions and is useful for locating the center of a hole or cylinder?

Which term describes a line that extends forever in two directions and is useful for locating the center of a hole or cylinder?

• A. Work Axis
• B. Work Point
• C. Inscribe
• D. Fillet

Answer: (B)

A line that extends forever in both directions serves as a central reference through the geometry, known as an axis. In design and CAD contexts, a work axis is the centerline used to locate the center of circular features like holes or cylinders and to align other geometry around that center. A single point is just a location and doesn’t provide a directional reference for locating centers, while inscribe and fillet describe operations on shapes rather than naming a centerline. So the term that matches the description—the line that runs through the center and extends indefinitely—is work axis.

A line that extends forever in both directions serves as a central reference through the geometry, known as an axis. In design and CAD contexts, a work axis is the centerline used to locate the center of circular features like holes or cylinders and to align other geometry around that center. A single point is just a location and doesn’t provide a directional reference for locating centers, while inscribe and fillet describe operations on shapes rather than naming a centerline. So the term that matches the description—the line that runs through the center and extends indefinitely—is work axis.