Which statement about the listed body-and-arm configurations is accurate?

• A. The configurations never include Cartesian coordinate assembly.
• B. The listed configurations include Polar, Cylindrical, Cartesian, and Jointed-arm assemblies.
• C. The configurations include a spherical coordinate assembly as a standard.
• D. The configurations are limited to Cartesian only.

Answer: (B)

Understanding that robot arms can be described in several coordinate systems and assembly types.

This option is correct because it reflects the variety of ways engineers describe how a robot’s body and arm can be configured. Polar coordinates describe positions in a plane with a radius and angle, cylindrical coordinates add height to that and are useful for vertical extensions, Cartesian coordinates use x, y, and z for straightforward spatial description, and a jointed-arm assembly refers to a serial arrangement of rotary joints typical of many industrial manipulators. Together, these cover both coordinate representations and common mechanical configurations that appear in practice.

The other statements are not as accurate. Cartesian coordinates do appear in many configurations, so saying Cartesian is never used is false. Restricting to Cartesian only ignores the other useful representations. Including a spherical coordinate assembly as a standard is not generally listed among the common body-and-arm configurations, making that option less accurate.