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Measurement & Calibration Flashcards

7 cards from real CPT 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 & Calibration flashcards as text

  1. A micrometer reads 0.752 inches but the actual dimension is 0.750 inches. This 0.002-inch error is best described as:

    Answer: Systematic error

    A consistent offset from the true value is a systematic error, often caused by instrument miscalibration or a zero offset.

  2. Which of the following best describes 'measurement traceability'?

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

    Traceability means every measurement can be connected through an unbroken calibration chain to a recognized standard such as NIST.

  3. When calibrating a pressure gauge, the technician compares it against a deadweight tester. The deadweight tester is serving as the:

    Answer: Reference standard

    The deadweight tester provides a known, accurate pressure value against which the gauge being calibrated is compared, making it the reference standard.

  4. A dial indicator has a resolution of 0.001 inch. What does resolution mean in this context?

    Answer: The smallest increment the instrument can display or detect

    Resolution is the smallest change in the measured quantity that the instrument can distinguish and display.

  5. A Go/No-Go gage is used to check a shaft diameter. The shaft passes the Go end but fails the No-Go end. What does this result indicate?

    Answer: The shaft is within specification

    A part that passes (enters) the Go gage and does not pass (enter) the No-Go gage is within the specified tolerance range.

  6. Which environmental factor most commonly causes thermal expansion errors in precision measurement?

    Answer: Temperature

    Temperature changes cause materials to expand or contract, directly affecting dimensional measurements; the industry standard reference temperature is 68°F (20°C).

  7. A technician records five measurements of the same part: 2.501, 2.500, 2.502, 2.499, 2.500. The average is 2.5004. This instrument demonstrates:

    Answer: Low accuracy and high precision

    The readings are tightly clustered (high precision) but the average is slightly above the true value, indicating a small systematic offset (lower accuracy).