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. Which ASTM standard governs proof load testing for inch-series bolts?

    Answer: ASTM F606

    ASTM F606 specifies mechanical test methods for externally and internally threaded fasteners, including proof load testing.

  2. A fastener fails a wedge tensile test but passes a standard axial tensile test. What does this indicate?

    Answer: The material has low ductility under combined loading

    Wedge tensile testing evaluates a fastener's ability to sustain combined tensile and bending loads; failure indicates insufficient ductility under such conditions.

  3. What is the purpose of a Rockwell hardness test on a fastener?

    Answer: To verify heat treatment and estimate tensile strength

    Rockwell hardness correlates with tensile strength and confirms that heat treatment achieved the required mechanical properties.

  4. Which sampling plan standard is most commonly referenced for fastener incoming inspection in the US?

    Answer: ANSI/ASQ Z1.4

    ANSI/ASQ Z1.4 provides attribute sampling procedures widely used for lot-by-lot inspection of fasteners.

  5. What does a hydrogen embrittlement relief bake accomplish after electroplating?

    Answer: Drives absorbed hydrogen out of the base metal

    The bake at temperatures typically around 375°F–450°F for several hours allows hydrogen to diffuse out before it can cause delayed fracture.

  6. During a coating thickness inspection, a magnetic induction gauge reads higher than expected on a steel bolt. What is the most likely cause?

    Answer: The gauge was not zeroed on uncoated substrate

    Magnetic induction gauges must be zeroed on bare substrate of the same material; failure to do so produces falsely high readings.

  7. Which test is used to verify that a self-locking nut maintains its locking torque after multiple installation cycles?

    Answer: Prevailing torque test per ASTM F2329

    Prevailing torque testing per standards such as ASTM F2329 or IFI-100/107 measures the torque required to run a nut on and off a bolt over successive cycles.