Calibration of measurement tools ensures accuracy by

• A. Verifying Against Known Standards And Adjusting As Needed.
• B. Calibrating Only Once.
• C. Sharpening The Tools.
• D. Replacing The Tools.

Answer: (A)

Calibration of measurement tools means comparing the instrument’s readings to known, traceable reference values and making adjustments so its outputs match those standards. This fixes biases and drift that can occur from wear, temperature changes, or aging, keeping measurements accurate over time. After checking against certified standards, you adjust the instrument (zeros, spans, or other parameters) as needed and recheck to confirm accuracy. That’s why this option—verifying against known standards and adjusting as needed—best describes the purpose of calibration. It isn’t about sharpening or replacing tools, and it isn’t a one-time action, since accuracy can drift between calibrations.