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Inspection and Testing Methods Flashcards

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

Read the first 6 Inspection and Testing Methods flashcards as text

  1. What is 'destructive testing' and when is it typically used?

    Answer: Testing that renders the tested specimen unusable, typically used to determine material properties or failure modes

    Destructive testing intentionally damages or destroys the test specimen to determine properties such as tensile strength, impact resistance, or failure modes that cannot be assessed non-destructively.

  2. When establishing a calibration interval for measurement equipment, which factor is most important to consider?

    Answer: Usage frequency, measurement criticality, and historical calibration stability

    Calibration intervals should be based on how often and critically the equipment is used, past calibration history, and the consequences of out-of-calibration measurements on product quality.

  3. In acceptance sampling, the Lot Tolerance Percent Defective (LTPD) represents:

    Answer: The quality level at which lots should be rejected with a high probability (consumer's risk protection)

    LTPD (also called Rejectable Quality Level) is the poorest quality level the consumer is willing to accept with only a small probability (typically 10%), defining the consumer's risk point on the OC curve.

  4. What is the key difference between precision and accuracy in measurement?

    Answer: Precision refers to repeatability of measurements; accuracy refers to closeness to the true value

    Precision describes how closely repeated measurements agree with each other (repeatability), while accuracy describes how close a measurement is to the true or accepted reference value.

  5. Which sampling plan standard is most commonly referenced for attribute inspection in US manufacturing?

    Answer: ANSI/ASQ Z1.4

    ANSI/ASQ Z1.4 (formerly MIL-STD-105) is the most widely used attribute sampling standard in US industry, providing sampling plans indexed by AQL for inspection by attributes.

  6. What does Average Outgoing Quality (AOQ) represent in acceptance sampling with rectifying inspection?

    Answer: The average quality of accepted lots after defectives are replaced during rejected lot screening

    AOQ is the average fraction defective in outgoing product after applying rectifying inspection, where rejected lots are 100% inspected and all defectives replaced with conforming items.