Practice Test Geeks(CST) Certified Scale Technicians Practice Test
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Weights & Measures Certification Flashcards

7 cards from real CST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Weights & Measures Certification flashcards as text

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

    Answer: To detect errors caused by off-center placement of loads

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

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

    Answer: State weights and measures officials

    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.

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

    Answer: Class F (Field Standard)

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

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

    Answer: A calibration report or service record documenting the work performed

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

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

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

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

  6. A livestock scale with a 20,000 lb capacity and 10 lb divisions is tested and found to have an error of 30 lb at mid-range. Under NIST Handbook 44, is this within the MAE?

    Answer: No, the MAE for this scale is 20 lb (2 divisions)

    For a Class III scale with 10 lb divisions, the MAE is one scale division (10 lb) at minimum, so a 30 lb error at mid-range (where MAE may be 1–2 divisions depending on the load range) exceeds tolerance.

  7. What is meant by 'zero-load reference value' on an electronic scale?

    Answer: The scale's indication when no load is applied, used as a baseline for measurements

    The zero-load reference value is the scale's reading when unloaded, serving as the reference point from which net weight indications are derived.