CMS CMS Metrology & Measurement Systems

Question 1

What is the definition of 'accuracy' in a manufacturing measurement system?

Accepted Answer

How close a measured value is to the true or accepted reference value

Answer

The ability to get the same reading every time

Answer

The smallest increment a gauge can display

Answer

The range of values a gauge can measure

Question 2

Which Measurement System Analysis (MSA) study evaluates the combined variation from both repeatability and reproducibility?

Accepted Answer

Gauge R&R study

Answer

Attribute agreement analysis

Answer

Gage linearity study

Answer

Bias study

Question 3

What does 'traceability' mean in the context of manufacturing metrology?

Accepted Answer

Linking measurement results to national or international standards through an unbroken chain of calibrations

Answer

Tracking finished products through the supply chain

Answer

Recording which operator performed each measurement

Answer

Monitoring gauge wear over time

Question 4

A micrometer reads 0.001 inch. What does this value represent?

Accepted Answer

Its resolution (least count)

Answer

Its accuracy

Answer

Its repeatability

Answer

Its calibration interval

Question 5

Which instrument is most appropriate for measuring the roundness (circularity) of a precision machined shaft?

Accepted Answer

Roundness tester (roundness form analyzer)

Answer

Vernier caliper

Answer

Coordinate measuring machine (CMM)

Answer

Surface roughness profilometer

Question 6

In metrology, what is 'measurement uncertainty'?

Accepted Answer

A quantified range within which the true value is estimated to lie with a stated confidence level

Answer

The probability that a gauge will fail during inspection

Answer

The difference between two consecutive measurements

Answer

The time required to complete a measurement