Practice Test Geeks(CWT) Certified Weighing Technician Practice Test
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Measurement Standards & Accuracy Flashcards

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

Read the first 7 Measurement Standards & Accuracy flashcards as text

  1. What is 'buoyancy correction' in precision weighing?

    Answer: Adjusting for the upward force of air on the weight and sample

    Buoyancy correction accounts for the upward force of air displaced by the weight and the object being weighed, significant in high-precision applications.

  2. A technician notices that a scale's zero indicator drifts slowly upward over 30 minutes with no load. This is most likely caused by:

    Answer: Thermal warm-up of the electronic components

    Electronic components, especially load cells and amplifiers, require a warm-up period; zero drift during this time is a common and expected phenomenon.

  3. Under NIST Handbook 44, a 'division' (d) and a 'verification scale interval' (e) may differ. What does a larger 'e' value relative to 'd' indicate?

    Answer: The scale has enhanced display resolution beyond its verified accuracy

    When e > d, the display shows finer increments than the verified accuracy class requires, meaning displayed resolution exceeds verified accuracy.

  4. Which test specifically verifies that a scale's reading does not change when the load is shifted from one side of the platform to another?

    Answer: Shift or eccentric load test

    The shift or eccentric load test places the same weight at different positions on the platform to check for position-dependent reading errors.

  5. What is the primary purpose of NCWM's Publication 14?

    Answer: Establishing requirements for net-content labeling in commercial transactions

    NCWM Publication 14 provides guidelines and test procedures for checking net contents of packaged goods in commerce.

  6. A CWT candidate needs to calibrate a 500 lb capacity floor scale. Which ASTM weight class is most appropriate for the test weights?

    Answer: Class 6

    ASTM Class 6 weights are commonly specified for field use with commercial scales, balancing accuracy needs with practicality for field conditions.

  7. When a scale's reading fails to return to zero after a load is removed, this is called:

    Answer: Hysteresis error

    Hysteresis error occurs when the scale's reading path differs between increasing and decreasing loads, often manifesting as a non-zero reading after load removal.