CST Weights & Measures Certification 3

Question 1

What is the primary purpose of a 'shift test' when inspecting a commercial platform scale?

Accepted Answer

To detect errors caused by off-center placement of loads

Answer

The shift test places test weights in different zones of the platform to detect corner or section errors caused by uneven load distribution.

Question 2

Under NCWM guidelines, who has legal authority to enforce weights and measures laws at the state level?

Accepted Answer

State weights and measures officials

Answer

Weights and measures enforcement in the U.S. is primarily a state and local responsibility, carried out by state and county weights and measures officials.

Question 3

What class of weights is typically required for testing Class III commercial retail scales?

Accepted Answer

Class F (Field Standard)

Answer

NIST Handbook 105-1 specifies that Class F field standard weights are appropriate for testing Class III commercial devices in the field.

Question 4

A scale technician recertifies a vehicle scale after repairs. Which document must be completed and provided to the scale owner?

Accepted Answer

A calibration report or service record documenting the work performed

Answer

After service or calibration, the technician must provide documentation — typically a calibration report — describing the work done, standards used, and results obtained.

Question 5

What is the significance of 'traceability to national standards' in scale calibration?

Accepted Answer

Calibration results can be linked to NIST reference standards through an unbroken chain of comparisons

Answer

Metrological traceability means that calibration measurements are related to national (NIST) or international references through a documented, unbroken chain of comparisons with stated uncertainties.

(CST) Certified Scale Technicians Practice Test

(CST) Certified Scale Technicians Practice Test

CST Weights & Measures Certification 3