Which statement is true about the inspection frequency for linear measures?

• A. Original only
• B. Annually
• C. Original and visual annually
• D. None of the above

Answer: (B)

Regular verification of linear measuring tools is essential because these tools can drift with use, wear, or environmental factors. A one-time check when the tool is new only confirms its accuracy at that moment; over time, markings can shift or the instrument can lose calibration. Because drift can occur gradually, scheduling an inspection once a year provides a reliable baseline to confirm the tool still measures correctly against a known reference.

Relying on an original-only check would miss any changes that happen after the initial calibration, and relying on a visual check alone can miss actual errors in the scale or alignment that affect accuracy. Therefore, annual verification offers a practical balance, ensuring the tool remains trustworthy for measurements throughout its routine use.