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Welding Code Standards & Inspection 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. What does the term 'prequalified WPS' mean under AWS D1.1?

    Answer: A procedure that meets all D1.1 requirements and does not require qualification testing

    A prequalified WPS conforms to all specific requirements of AWS D1.1 and is exempt from procedure qualification testing.

  2. In magnetic particle testing (MT) of welds, what type of discontinuity CANNOT be reliably detected?

    Answer: Deep subsurface defects beyond about 1/4 inch

    MT detects surface and slightly subsurface discontinuities; it is not effective for defects located more than approximately 1/4 inch below the surface.

  3. Under ASME B31.3 Process Piping, what percentage of welds require radiographic examination for 'Normal' fluid service?

    Answer: 5%

    ASME B31.3 requires a minimum random examination rate of 5% of butt welds for Normal fluid service, unless elevated.

  4. What is the maximum interpass temperature limitation, and why is it important?

    Answer: It prevents the base metal from exceeding a set temperature, controlling grain growth and preserving mechanical properties

    Controlling maximum interpass temperature prevents excessive grain growth in the HAZ and maintains the required mechanical properties of the completed weld.

  5. A dye penetrant test (PT) reveals a linear indication at the toe of a fillet weld. The MOST likely discontinuity is:

    Answer: Toe crack

    Linear PT indications at the weld toe are characteristic of toe cracks, which initiate due to stress concentration and hydrogen embrittlement.

  6. According to AWS D1.1, what is required before a welder can weld on production joints using a new welding process they have not previously used?

    Answer: Successful completion of a welder performance qualification test for that process

    AWS D1.1 requires welders to pass a performance qualification test specific to each welding process before welding on structural production joints.

  7. What is 'stray arc' (arc strike) and why is it a code concern in structural welding?

    Answer: An inadvertent arc struck outside the weld zone, creating a hardened spot that can crack

    Arc strikes outside the weld zone create hardened, brittle spots in the base metal that are susceptible to cracking under service loads.