Practice Test Geeks(CST) Certified Scale Technicians Practice Test
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PM & Calibration Schedules 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 PM & Calibration Schedules flashcards as text

  1. A pharmaceutical bench scale's PM requires verification at 10%, 50%, and 100% of capacity. Why are multiple test points used instead of just full capacity?

    Answer: To detect non-linearity errors that may only appear at specific load ranges

    Testing at multiple points reveals non-linearity, where the scale may be accurate at one load but drift at others within its range.

  2. What is 'repeatability' in the context of a scale PM, and how is it tested?

    Answer: The consistency of readings for the same applied load over multiple trials; tested by loading and unloading the same weight several times

    Repeatability is the closeness of successive weight readings under identical conditions and is tested by applying and removing the same load multiple times.

  3. During a PM, a technician finds that a postal scale's display resolution is 0.1 oz but the calibration tolerance per NIST HB 44 for its class allows ±0.5 oz. The scale reads +0.3 oz at mid-capacity. What action is correct?

    Answer: Accept the scale as it is within the MPE tolerance

    A +0.3 oz error that falls within the ±0.5 oz MPE for the device class is acceptable and requires no adjustment.

  4. A PM work order requires checking the 'sealing' of an approved scale. What does verifying seals accomplish?

    Answer: Ensures no unauthorized adjustments have been made to the calibration parameters since the last inspection

    Regulatory seals protect adjustable calibration parameters from unauthorized tampering between official inspections.

  5. A predictive maintenance program for industrial scales uses which type of data to schedule PM before a failure occurs?

    Answer: Trend data from ongoing performance monitoring, such as drift rate and repeatability history

    Predictive maintenance uses performance trend data to identify deterioration patterns and schedule intervention before the device fails or exceeds tolerance.

  6. When calibrating a floor scale using the shift-weight method, what is the purpose of moving a partial test weight set across multiple positions on the platform?

    Answer: To detect corner or section errors without a full-capacity test weight set

    The shift-weight method detects section or corner errors by moving a fraction of capacity across the platform when a full-capacity set is unavailable.

  7. A calibration label on a piece-counting scale shows 'Next Cal Due: 06/2026.' A PM technician visiting in July 2026 finds no updated label. What is the appropriate response?

    Answer: Remove the scale from service until a calibration is completed and a new label is applied

    An expired calibration means the scale's accuracy cannot be assured; it must be removed from service, calibrated, and re-labeled before use.