Calibration and test steps after a maintenance action typically involve which of the following?

• A. Calibrating to environmental conditions only.
• B. Verifying tolerances or performance using standard test methods and reference values.
• C. Replacing parts without testing.
• D. Documenting only the maintenance action in log.

Answer: (B)

Calibration and test steps after a maintenance action are about confirming the equipment still meets its defined tolerances and performance by using standard test methods and reference values. This means you align the measurement system to a known reference and then verify functionality with established tests that compare actual performance to documented specifications. Relying only on environmental calibration can hide drift or faults that show up under operating conditions, and replacing parts without testing skips validation that the repair actually restored proper function. Documentation is important, but it does not by itself prove readiness without evidence from tests and references.