CQI CQI Metrology & Measurement Systems 1

Question 1

What is the primary purpose of calibration in metrology?

Accepted Answer

To ensure measurements are traceable to a known standard

Answer

Calibration establishes measurement traceability by comparing an instrument's readings to a known reference standard.

Question 2

Which instrument is commonly used to measure the internal diameter of a bore?

Accepted Answer

Bore gauge

Answer

A bore gauge is specifically designed to accurately measure internal diameters.

Question 3

What does 'measurement uncertainty' represent?

Accepted Answer

The doubt about the validity of a measurement result

Answer

Measurement uncertainty quantifies the doubt associated with a measurement result, expressing the range within which the true value likely falls.

Question 4

How often should measuring instruments be calibrated?

Accepted Answer

According to a defined calibration schedule based on use and risk

Answer

Calibration frequency is determined by usage, environmental conditions, and the risk associated with out-of-calibration measurements.

Question 5

What is the purpose of a surface plate in metrology?

Accepted Answer

To provide a flat reference datum for measurements

Answer

A surface plate provides a known flat datum used as a reference plane for dimensional measurements and layout work.

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