Which of the following statements is true regarding datums?

The statement that datums assure repeatability for the location of the part for inspection is accurate and reflects the fundamental role of datums in GD&T. Datums serve as reference points, lines, or planes upon which measurements are based. They provide a common starting point for positioning the part in the inspection setup, ensuring that every measurement is taken from a consistent and repeatable reference. This is crucial in achieving uniformity and accuracy in inspection processes across multiple parts or sessions.

By establishing fixed reference points, datums help reduce variability that could arise from using different, potentially shifting reference frames. This repeatability enhances the reliability of inspection results and supports quality control processes. In practice, using properly defined datums facilitates communication regarding how parts are to be oriented and measured, leading to improved consistency and fewer errors in manufacturing and quality assurance.