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Weld Inspection and Defects Flashcards

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

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  1. Which destructive test is used to evaluate the ductility and soundness of a weld by bending the specimen around a mandrel?

    Answer: Guided bend test

    The guided bend test bends a weld specimen around a mandrel of specified diameter to reveal surface cracks, lack of fusion, and porosity.

  2. Lamellar tearing in a weld joint is most commonly caused by:

    Answer: High sulfur content in base metal and through-thickness loading

    Lamellar tearing occurs in base metal with low through-thickness ductility (often due to sulfide inclusions) when restrained welds apply stress in the Z-direction.

  3. What does the term 'lack of sidewall fusion' specifically describe?

    Answer: Incomplete fusion between the weld metal and the groove face of the base metal

    Lack of sidewall fusion means the weld metal did not bond properly to the vertical groove faces of the base material on either side of the joint.

  4. During radiographic testing, a linear indication parallel to the weld axis most likely represents:

    Answer: Longitudinal crack or lack of fusion

    Linear indications aligned with the weld axis on a radiograph typically indicate longitudinal cracks or planar lack-of-fusion defects.

  5. Which weld discontinuity is most likely detected by magnetic particle testing but NOT by liquid penetrant testing?

    Answer: Subsurface crack just below the surface

    Magnetic particle testing can detect near-surface subsurface discontinuities, while liquid penetrant testing is limited strictly to surface-open defects.

  6. A welder notices fisheye fractures on the face of a broken tensile specimen. This indicates the presence of:

    Answer: Hydrogen-induced porosity or inclusions

    Fisheyes are circular shiny spots on a fracture surface caused by hydrogen trapped in the weld metal around pores or inclusions.

  7. What standard acceptance criterion terminology indicates a discontinuity that does NOT meet code requirements and must be repaired or removed?

    Answer: Rejectable defect

    A 'defect' is a discontinuity that exceeds the acceptance criteria of the applicable code, making it rejectable and requiring repair or removal.