Which of the following best describes a CNC machine?

A CNC machine is best described as a computer-controlled machine tool for precise operations. This definition highlights the core functionality that distinguishes CNC (Computer Numerical Control) machines from other types of machine tools. CNC machines utilize computer programming to control their movements and operations, allowing for highly accurate and repeatable manufacturing processes. This precision is essential in various machining tasks, such as milling, turning, and drilling, where tight tolerances are required.

In contrast, a manually operated machine tool does not have the capabilities that CNC machines provide, as it relies solely on human operators for control and input. A machine tool that requires extensive human intervention would suggest a less automated process, which is not characteristic of CNC technology, which is designed to minimize manual labor. Lastly, stating that a CNC machine is primarily used for woodworking is misleading since CNC machines can be used to work with a variety of materials, including metals, plastics, and composites, not just wood. This versatility in material handling further underscores the significance and functionality of CNC technology in modern manufacturing.