Practice Test Geeks(CFS) Certified Fastener Specialist Practice Test
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Fastener Testing & Quality Control Flashcards

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

Read the first 7 Fastener Testing & Quality Control flashcards as text

  1. What does the term 'lot traceability' mean in fastener quality control?

    Answer: Tracking a fastener from raw material heat through finished product

    Lot traceability links each finished fastener lot back to the raw material heat, manufacturing records, and test data for accountability.

  2. A torque-tension test on a fastener assembly shows high clamp load variation. Which variable is most likely responsible?

    Answer: Coefficient of friction between mating surfaces

    Friction at the bearing face and in the threads accounts for approximately 90% of applied torque, so friction variation causes significant clamp load scatter.

  3. Which destructive test is specifically designed to detect seams, laps, or folds in the head of a bolt?

    Answer: Macro etch examination

    Macro etch (or cross-section examination) reveals internal discontinuities such as seams and cold-working defects in bolt heads.

  4. What is the significance of the 'acceptance quality limit' (AQL) in fastener inspection?

    Answer: Percentage of defectives considered acceptable for a lot to pass

    AQL defines the maximum percent defective (or defects per hundred units) that is still considered acceptable for routine sampling inspection.

  5. A hydrogen embrittlement susceptibility test requires fasteners to be loaded at what percentage of their proof load?

    Answer: 75%

    Per ASTM F1940 and similar standards, sustained load tests for hydrogen embrittlement detection are typically conducted at 75% of proof load.

  6. Which document must accompany a shipment of fasteners to certify compliance with a specific ASTM standard?

    Answer: Certificate of conformance (C of C)

    A certificate of conformance formally attests that the fasteners meet the requirements of the referenced specification and includes test data or mill records.

  7. What condition is being checked when a thread gauge 'GO' ring gauge passes but 'NO-GO' ring gauge also passes on an external thread?

    Answer: Thread is oversized beyond the maximum material limit

    If the NO-GO gauge passes, the thread pitch diameter is below the minimum material condition, meaning the thread is undersized.