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Destructive & Non-Destructive Testing Flashcards

7 cards from real AWS 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. What NDT method is most effective for detecting subsurface laminar discontinuities in steel plate?

    Answer: Ultrasonic testing

    Ultrasonic testing can detect internal planar and laminar flaws through the full thickness of steel plate, which surface methods cannot reach.

  2. A Charpy V-notch impact test evaluates which mechanical property of a weld or base metal?

    Answer: Toughness (notch impact energy)

    The Charpy V-notch test measures absorbed energy during fracture, quantifying toughness and transition temperature behavior.

  3. In magnetic particle testing, a circular magnetization technique is best suited for detecting which flaw orientation?

    Answer: Longitudinal cracks parallel to the current flow

    Circular magnetization creates flux lines encircling the conductor, making it most sensitive to longitudinal (axial) discontinuities.

  4. Which destructive test is specifically designed to assess the ductility of a weld by wrapping the specimen around a fixed-radius die?

    Answer: Guided bend test

    The guided bend test bends the weld specimen around a plunger of specified radius to reveal cracks and evaluate ductility and fusion.

  5. An IQI (image quality indicator) in radiographic testing is used to verify:

    Answer: The sensitivity and quality of the radiographic image

    The IQI (penetrameter) demonstrates that the radiographic technique has sufficient sensitivity to detect discontinuities of a specified size.

  6. When performing dye penetrant testing on an austenitic stainless steel weld, which pre-cleaning method is NOT recommended?

    Answer: Acid pickling without neutralization

    Acid residues left in discontinuities after pickling without neutralization can mask penetrant indications and produce false-negative results.

  7. A hardness test result on a weld HAZ that significantly exceeds the base metal hardness may indicate:

    Answer: Susceptibility to hydrogen-induced cracking

    High HAZ hardness (typically above 350 HV) indicates a martensitic microstructure that is susceptible to hydrogen-assisted cold cracking.