What does matching serial numbers between the standard block and the gauge ensure?

• A. Durability
• B. Traceability
• C. Color match
• D. Calibration stability

Answer: (B)

Matching serial numbers between the standard block and the gauge ensures traceability. In metrology, traceability means you can relate a measurement back through an unbroken calibration history to recognized standards. The serial number on the standard block ties its calibration certificate to a specific point in time, and when the gauge shares that same serial, you know the gauge was calibrated against that exact standard block. This linkage lets you verify where the measurement came from and trust that it’s connected to the formal calibration records.

Durability, color match, and calibration stability aren’t dependent on linking serial numbers to the block. Durability is about physical wear resistance, color match isn’t relevant to measurement accuracy, and calibration stability concerns how measurements drift over time, not the provenance of the calibration itself.