The device that provides the means to compare a test surface to a standard surface finish is called:

• A. Measuring magnifier
• B. Surface calibrator
• C. Surface comparator
• D. Surface magnifier

Answer: (B)

The main idea is establishing a known reference finish to judge another surface against. A surface calibrator provides that fixed, known standard of surface texture, which you use to set the measurement reference or to verify that a test surface matches the defined finish. By calibrating with this standard, you ensure the test surface’s finish can be assessed consistently and traceably.

The other options don’t provide that standard reference: a magnifier simply enlarges the view to inspect details, and a surface comparator is used for side-by-side visual checks but relies on a reference, whereas the calibrator is the device that defines and delivers that standard reference itself.