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Weld Inspection & Quality Control 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. Which of the following is an example of a 'planar' discontinuity that is generally more detrimental to weld integrity than a volumetric one?

    Answer: Crack

    Cracks are planar (two-dimensional) discontinuities with sharp tips that act as stress concentrators, making them far more detrimental than rounded volumetric defects.

  2. When performing MT using the wet fluorescent method, what type of lighting is required for indication evaluation?

    Answer: Ultraviolet (black) light with ambient white light below 2 foot-candles

    Wet fluorescent MT requires UV-A (black) light and low ambient white light (typically ≤2 fc) so that fluorescent indications are clearly visible.

  3. What does 'incomplete fusion' (IF) mean in a welded joint?

    Answer: A lack of bonding between weld metal and base metal or between weld passes

    Incomplete fusion is a lack of coalescence between the weld metal and base metal, or between adjacent weld passes, at the weld interface.

  4. A welder's qualification test is performed using 3G and 4G positions. Which production weld positions does this combination qualify the welder to use?

    Answer: All positions (1G, 2G, 3G, 4G)

    Per AWS D1.1, passing both 3G (vertical) and 4G (overhead) groove weld tests qualifies the welder for all positions (1G through 4G).

  5. What is a 'heat-affected zone' (HAZ) in welding?

    Answer: The base metal region adjacent to the weld that experienced metallurgical changes due to welding heat without melting

    The HAZ is the base metal region adjacent to the fusion zone that was heated enough to change its microstructure but not to the melting point.

  6. When measuring arc energy (heat input) for a weld pass, which three variables are required?

    Answer: Voltage, amperage, and travel speed

    Heat input is calculated as (Voltage × Amperage × 60) ÷ Travel Speed (in/min), requiring voltage, amperage, and travel speed.

  7. Which standard governs the qualification of nondestructive testing (NDT) personnel in the United States, as commonly referenced by AWS codes?

    Answer: ASNT SNT-TC-1A

    ASNT SNT-TC-1A (American Society for Nondestructive Testing Recommended Practice) is the widely referenced standard for qualifying and certifying NDT personnel.