CST Regulatory Compliance & Safety Standards 2

Question 1

Under NIST Handbook 44, what is the maximum permissible error (MPE) for a Class III commercial scale at its test load?

Accepted Answer

1 scale division

Answer

NIST HB 44 specifies that Class III devices have an MPE of 1 scale division (d) for loads up to 500d, and 2d for loads from 500d to 2000d.

Question 2

Which federal agency has primary authority over commercial weighing and measuring devices used in interstate commerce?

Accepted Answer

NIST

Answer

NIST (National Institute of Standards and Technology) sets national standards for weights and measures through its Office of Weights and Measures.

Question 3

A scale technician is asked to place a device 'out of service.' Which action is the correct procedure?

Accepted Answer

Attach an official rejection tag and notify the weights and measures authority

Answer

Rejected devices must be tagged with an official rejection notice and the appropriate weights and measures jurisdiction must be notified per standard enforcement procedures.

Question 4

What does the term 'traceability' mean in the context of scale calibration?

Accepted Answer

An unbroken chain of comparisons linking measurements to national or international standards

Answer

Traceability means calibration can be verified through an unbroken, documented chain of comparisons back to NIST or an equivalent national measurement institute.

Question 5

Which OSHA standard most directly governs electrical safety practices a scale technician must follow when servicing powered weighing equipment?

Accepted Answer

29 CFR 1910.147 (Lockout/Tagout)

Answer

29 CFR 1910.147, the Control of Hazardous Energy (Lockout/Tagout) standard, requires de-energizing equipment before servicing to prevent unexpected startup.

(CST) Certified Scale Technicians Practice Test

(CST) Certified Scale Technicians Practice Test

CST Regulatory Compliance & Safety Standards 2