Practice Test Geeks(CPT) Certified Packaging Technologist Practice Test
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Quality Control & Testing 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 Quality Control & Testing flashcards as text

  1. Which instrument measures the coefficient of friction (COF) between packaging film surfaces?

    Answer: Tensile tester with COF sled

    A tensile tester fitted with a COF sled drags one film surface across another to measure static and kinetic friction.

  2. What does MVTR stand for in packaging testing?

    Answer: Moisture Vapor Transmission Rate

    MVTR (Moisture Vapor Transmission Rate) measures how much water vapor passes through a packaging material over time.

  3. A six-sigma process has a defect rate of approximately:

    Answer: 3.4 PPM

    A true six-sigma process produces only 3.4 defects per million opportunities, accounting for a 1.5-sigma shift.

  4. Which test evaluates a bottle's resistance to internal pressure bursting?

    Answer: Hydrostatic burst test

    The hydrostatic burst test pressurizes containers with water until failure, measuring the burst pressure.

  5. In packaging quality, a 'critical defect' is best described as:

    Answer: A defect rendering the unit completely unusable or causing safety hazard

    Critical defects are those that may cause safety hazards or complete unit failure, requiring zero acceptance in sampling plans.

  6. What does the Elmendorf tear tester measure?

    Answer: Force required to propagate a tear in flexible materials

    The Elmendorf tear tester measures the energy required to continue a tear through a pre-cut film or paper specimen.

  7. Which quality tool is used to identify the vital few causes responsible for most defects?

    Answer: Pareto chart

    A Pareto chart ranks causes by frequency to identify the vital few (typically 20%) responsible for the majority (80%) of defects.