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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.

Read the first 7 Weld Inspection & Quality Control flashcards as text

  1. What is the purpose of a preheat treatment applied before welding high-carbon or alloy steels?

    Answer: To reduce the cooling rate and minimize hydrogen cracking

    Preheat slows the cooling rate of the weld and heat-affected zone, reducing the risk of hydrogen-induced cracking and martensite formation.

  2. In radiographic testing, what does a lower image quality indicator (IQI) designation number indicate?

    Answer: Thinner wire or smaller hole, indicating higher sensitivity

    A lower IQI wire or hole number indicates a smaller size; being able to see a smaller IQI means the technique has higher sensitivity.

  3. Which type of crack typically occurs in the heat-affected zone (HAZ) of high-strength low-alloy (HSLA) steels and is often caused by hydrogen?

    Answer: Cold crack (hydrogen-induced cracking)

    Cold cracking (hydrogen-induced cracking) occurs in the HAZ of HSLA steels below approximately 300°F as hydrogen diffuses to stress concentrations.

  4. A CWI reviewing a weld procedure specification (WPS) notices the preheat temperature listed is lower than that required by the applicable code. What should the inspector do?

    Answer: Reject the WPS and require revision to meet code minimums

    The WPS must conform to applicable code requirements; an insufficient preheat temperature is a nonconformance that requires the WPS to be revised.

  5. Which welding defect is caused by the entrapment of shielding gas or evolved gases during solidification of the weld pool?

    Answer: Porosity

    Porosity results from gas bubbles trapped in the solidifying weld metal, typically due to contamination, moisture, or loss of shielding gas coverage.

  6. When performing visual inspection of a completed weld, which tool is specifically used to measure the convexity or concavity of a weld bead profile?

    Answer: Bridge cam gauge

    A bridge cam gauge (also called a Hi-Lo gauge or Tempilstik gauge) is used to measure weld profiles including convexity, concavity, and reinforcement height.

  7. In the context of AWS welding codes, what does the abbreviation 'PQR' stand for?

    Answer: Procedure Qualification Record

    PQR (Procedure Qualification Record) documents the actual welding parameters and test results used to qualify a welding procedure specification.