ASQ Certified Calibration Technician (CCT) Flashcards

What is 'calibration' in a measurement context?

Answer: The process of comparing a measuring instrument against a known reference standard to detect and document deviations

Calibration compares an instrument's output against a traceable reference standard to determine its accuracy and document any deviations.

'Metrological traceability' means:

Answer: An unbroken chain of calibrations linking a measurement back to national or international measurement standards

Metrological traceability establishes a documented, unbroken chain of calibrations from the instrument through reference standards up to national or international standards such as NIST.

'Measurement uncertainty' in calibration represents:

Answer: A quantified expression of doubt about the measurement result, accounting for all identified sources of error

Measurement uncertainty is a parameter that characterizes the range of values within which the true value is estimated to lie, considering all significant error sources.

What is 'accuracy' in measurement?

Answer: How closely a measurement result agrees with the true or accepted reference value

Accuracy describes how close a measurement is to the true or accepted reference value, distinguishing it from precision which is about repeatability.

What is 'precision' in the context of measurement systems?

Answer: The degree of agreement among repeated independent measurements under the same conditions

Precision refers to the repeatability or reproducibility of measurements — how consistently an instrument gives the same result under unchanged conditions.

A 'calibration interval' is defined as:

Answer: The specified period between successive calibrations of an instrument

The calibration interval is the scheduled time period between calibrations, set to ensure an instrument remains within acceptable limits throughout its use.