ASQ Certified Calibration Technician (CCT) Flashcards

The purpose of a calibration certificate is to:

Answer: Document the calibration results, including as-found and as-left conditions, and confirm traceability

A calibration certificate documents the measurement results, traceability chain, environmental conditions, and as-found/as-left status of the calibrated instrument.

When a measurement instrument is found 'out of tolerance' during calibration, the first required action is:

Answer: Assess the impact on previous measurements made with the instrument since its last in-tolerance calibration

When an instrument is found out of tolerance, an impact assessment must determine whether measurements made since the last valid calibration are suspect.

What does 'NIST traceability' mean for a calibration laboratory in the United States?

Answer: Calibration standards used by the lab can be traced through an unbroken chain of comparisons to NIST reference standards

NIST traceability means the lab's reference standards are calibrated by an unbroken chain of comparisons ultimately linking to the National Institute of Standards and Technology's primary reference standards.

A Gauge Repeatability and Reproducibility (GR&R) study evaluates:

Answer: The amount of variation in measurements caused by the measurement system itself — the gauge and the operators

A GR&R study separates total measurement variation into components: repeatability (gauge variation) and reproducibility (operator-to-operator variation).

'Resolution' of a measuring instrument refers to:

Answer: The smallest increment that can be detected or displayed by the instrument

Resolution is the smallest difference in quantity that an instrument can detect and display, setting the limit for measurement discrimination.

A 'reference standard' in a calibration hierarchy is:

Answer: A measurement standard maintained primarily to calibrate working standards, kept with high accuracy under controlled conditions

A reference standard is maintained primarily to calibrate other standards (working standards) and is kept under controlled conditions to preserve its accuracy.