CCT CCT Quality Management & Documentation 2

Question 1

What is 'measurement uncertainty' as used in calibration documentation?

Accepted Answer

A quantified doubt about the validity of a measurement result

Answer

Measurement uncertainty is a parameter that characterizes the dispersion of values that could reasonably be attributed to the measurand, quantifying the doubt about the measurement result.

Question 2

Which US federal agency provides the national measurement standards that calibration traceability chains reference?

Accepted Answer

NIST

Answer

The National Institute of Standards and Technology (NIST) is the US federal agency responsible for maintaining national measurement standards to which calibration traceability is established.

Question 3

What is the purpose of a 'calibration interval'?

Accepted Answer

The scheduled period between successive calibrations to ensure ongoing accuracy

Answer

A calibration interval defines the maximum time between calibrations, determined by factors such as instrument stability, usage conditions, and required measurement accuracy.

Question 4

In a quality management system, what is the role of an 'audit trail' in calibration records?

Accepted Answer

To provide a chronological record of changes to documents and data

Answer

An audit trail in calibration records provides a chronological, tamper-evident history of all changes to calibration data and documents, supporting accountability and traceability.

Question 5

What does a 'Test Uncertainty Ratio' (TUR) of 4:1 mean in calibration quality standards?

Accepted Answer

The reference standard is four times more accurate than the device under test

Answer

A TUR of 4:1 means the measurement uncertainty of the reference standard is at least four times smaller than the tolerance of the device under test, providing adequate calibration confidence.

(CCT) Certified Calibration Technician Practice Test

(CCT) Certified Calibration Technician Practice Test

CCT CCT Quality Management & Documentation 2