Which of the following is NOT listed as a common body-and-arm configuration for industrial robots?

• A. Polar coordinate assembly
• B. Cylindrical assembly
• C. Spherical coordinate assembly
• D. Jointed-arm assembly

Answer: (C)

Understanding which body-and-arm configurations are commonly used in industrial robots. In practice, the standard configurations you’ll encounter are Cartesian (rectilinear), cylindrical, polar, and the articulated (jointed-arm) robot. The spherical coordinate arrangement, while possible in theory, is not routinely listed in typical catalogs or curricula as a common industrial configuration because it offers a more limited or awkward work envelope for many tasks and tends to be more complex to control. That’s why it’s the one that isn’t usually included among the common options.

So the other choices fit the usual patterns: polar-coordinate, cylindrical, and articulated (jointed-arm) robots are commonly described and used in industry.