CMS Equipment Calibration & Maintenance 2

Question 1

Which calibration method uses a known reference standard traceable to NIST to verify instrument accuracy?

Accepted Answer

Traceability-based calibration

Answer

Traceability-based calibration links measurements to national or international standards through an unbroken chain of comparisons, ensuring accuracy is referenced to NIST.

Question 2

A pressure gauge consistently reads 5 PSI higher than the true value across its entire range. This is best described as:

Accepted Answer

Systematic bias (offset error)

Answer

A constant, consistent deviation from true value across the entire measurement range indicates a systematic bias or offset error.

Question 3

What does 'calibration interval' refer to in a maintenance program?

Accepted Answer

The scheduled period between successive calibration checks

Answer

The calibration interval is the defined time period between recalibrations, determined by equipment stability, usage frequency, and regulatory requirements.

Question 4

Which type of maintenance is performed based on the actual condition of equipment rather than a fixed schedule?

Accepted Answer

Predictive maintenance

Answer

Predictive maintenance uses condition monitoring data (vibration, temperature, oil analysis) to determine when maintenance is actually needed.

Question 5

When calibrating a torque wrench, the reference standard used must have an uncertainty that is at least how much better than the device under test?

Accepted Answer

4 times better (4:1 ratio)

Answer

The standard 4:1 Test Accuracy Ratio (TAR) requires that the reference standard's uncertainty be at least four times smaller than the device being calibrated.

(CMS) Certified Manufacturing Specialist Practice Test

(CMS) Certified Manufacturing Specialist Practice Test

CMS Equipment Calibration & Maintenance 2