What is the purpose of periodic calibration of inspection equipment?

• A. To maintain accuracy and reliability of measurements over time.
• B. To reduce the weight of tools.
• C. To improve aesthetics of the equipment.
• D. To increase the speed of inspections.

Answer: (A)

Periodic calibration is performed to keep inspection tools accurate and reliable over time. Instruments can drift due to wear, temperature changes, or aging, causing readings to deviate from true values. Calibration compares the tool’s measurements to known standards, makes any necessary adjustments, and documents the results, preserving traceability and reducing measurement uncertainty. This ensures parts are evaluated against correct tolerances and that inspection results stay consistent and defensible. The other options don’t address measurement accuracy or reliability, as weight, aesthetics, or speed are not what calibration changes.