NIMS Measurement, Materials, and Safety (MMS) Practice Exam

A coordinate measurement machine (CMM) operates by utilizing a probe to assess the physical geometrical characteristics of an object. It is designed to accurately measure the dimensions, shapes, and positions of various features on a workpiece in three-dimensional space. By systematically moving the probe over the object's surface, the CMM gathers precise data points, which can then be analyzed to evaluate the object's conformity to its design specifications. This capability makes the CMM an essential tool in quality control and assurance in manufacturing industries, where precision is critical.

The other options fail to accurately describe the function of a CMM. Measuring temperature changes pertains to thermal analysis, which is unrelated to the geometric measurement focus of a CMM. Analyzing chemical composition pertains to techniques such as spectroscopy or chromatography, which are not functions of a CMM. Testing electrical conductivity is typically done using a multimeter or similar devices, not a CMM, which centers on spatial measurements rather than electrical properties.