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Welding Inspection, Testing & 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. According to AWS D1.1, what is the minimum preheat temperature typically required when welding ASTM A36 steel with a thickness greater than 1.5 inches using a low-hydrogen process?

    Answer: 150°F (66°C)

    AWS D1.1 requires a minimum preheat of 150°F (66°C) for Group I steels like A36 when thickness exceeds 1.5 inches with low-hydrogen electrodes.

  2. What is the primary purpose of a weld procedure qualification test (PQR)?

    Answer: To demonstrate that the welding process produces a joint with the required mechanical properties

    The PQR is a record of actual test results used to prove that a welding procedure specification (WPS) will produce welds meeting specified mechanical requirements.

  3. In magnetic particle testing (MT), what type of discontinuity orientation produces the strongest indication?

    Answer: Perpendicular to the magnetic field

    Discontinuities oriented perpendicular to the magnetic field lines cause the greatest flux leakage, producing the strongest and most detectable MT indication.

  4. What does the letter 'E' designate in an electrode classification such as E7018?

    Answer: Electrode (filler metal rod)

    In the AWS electrode classification system, 'E' stands for electrode, indicating a coated filler metal rod used in SMAW.

  5. Which welding inspection method is classified as a volumetric examination technique?

    Answer: Radiographic testing (RT)

    Radiographic testing is a volumetric method that can detect discontinuities throughout the entire thickness of a weld, not just at the surface.

  6. What is the function of the heat-affected zone (HAZ) measurement in weld inspection?

    Answer: To assess the extent of metallurgical changes caused by welding heat in the base metal

    The HAZ is the base metal region adjacent to the weld that has experienced microstructural changes due to welding heat without melting, and its extent affects mechanical properties.

  7. When a guided bend test specimen fractures in the tension zone during testing, what does this typically indicate?

    Answer: The weld contains a significant discontinuity such as lack of fusion or a crack

    Fracture during a guided bend test indicates the presence of a significant weld discontinuity such as cracking, lack of fusion, or excessive porosity that caused premature failure.