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CWS Weld Inspection & Testing Flashcards

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

Read the first 6 CWS Weld Inspection & Testing flashcards as text

  1. A supervisor reviewing a weld traveler finds the interpass temperature was recorded at 500°F for a P-1 carbon steel weld with a 400°F maximum interpass limit. What is the correct action?

    Answer: Reject the weld and require NDE to assess heat damage

    Exceeding the maximum interpass temperature is a code violation that can cause grain growth and reduce toughness, requiring rejection and NDE evaluation.

  2. Which type of weld discontinuity is most critical in fatigue-loaded structures because it acts as a stress concentrator?

    Answer: Cracks

    Cracks are the most severe discontinuity in fatigue-loaded structures because their sharp notch tips create intense stress concentrations that propagate under cyclic loading.

  3. What does the term 'fusion boundary' refer to in weld metallurgy?

    Answer: The interface between the weld metal and the HAZ

    The fusion boundary is the interface where the molten weld pool met the base metal, separating the weld metal zone from the heat-affected zone (HAZ).

  4. A weld procedure specification (WPS) requires PWHT at 1,150°F ± 25°F. The supervisor's chart recorder shows a peak of 1,183°F. What should the supervisor do?

    Answer: Document it as non-conformance and evaluate per code

    Any deviation from the WPS PWHT temperature range is a non-conformance that must be documented and evaluated per the applicable code before disposition.

  5. Magnetic particle testing (MT) is best suited for which type of material?

    Answer: Ferromagnetic materials

    Magnetic particle testing requires ferromagnetic materials (iron, nickel, cobalt and their alloys) because the test relies on magnetic flux leakage at discontinuities.

  6. When a CWS reviews welder performance qualification records, what is the maximum time interval allowed between qualification and production welding before requalification is required per AWS D1.1?

    Answer: 6 months

    Per AWS D1.1, a welder's qualification expires if they have not welded with a given process for a period exceeding 6 months.