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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 Inspection & Quality Control flashcards as text

  1. According to AWS standards, what is the minimum preheat temperature purpose in welding inspection?

    Answer: To reduce hardness in the HAZ and minimize hydrogen cracking

    Preheat reduces the cooling rate in the HAZ, lowers hardness, and allows hydrogen to escape, thereby minimizing the risk of hydrogen-induced cracking.

  2. Which nondestructive examination method uses sound waves above 20 kHz to detect internal discontinuities?

    Answer: Ultrasonic testing

    Ultrasonic testing (UT) uses high-frequency sound waves transmitted through the material to detect and characterize internal flaws.

  3. During a welder qualification test, what is the purpose of the root bend specimen?

    Answer: To evaluate soundness of the weld root

    The root bend test bends the specimen with the weld root in tension to reveal lack of fusion, cracks, or other defects at the weld root.

  4. What term describes the groove melted into the base metal adjacent to the weld toe, which reduces the cross-section of the base metal?

    Answer: Undercut

    Undercut is a groove melted into the base metal at the weld toe that is not filled with weld metal, reducing the effective cross-sectional area.

  5. In magnetic particle testing (MT), which type of magnetization is best for detecting longitudinal cracks parallel to the weld axis?

    Answer: Circular magnetization

    Circular magnetization creates magnetic field lines perpendicular to the weld axis, making it optimal for detecting longitudinal (parallel) cracks.

  6. What is the purpose of post-weld heat treatment (PWHT) from an inspection standpoint?

    Answer: To reduce residual stresses and improve toughness

    PWHT relieves residual stresses induced during welding and can improve toughness, ductility, and corrosion resistance of the weld and HAZ.

  7. Which AWS document establishes the structural welding code for steel and contains acceptance criteria for weld quality?

    Answer: AWS D1.1

    AWS D1.1 Structural Welding Code—Steel contains provisions for design, procedures, qualifications, fabrication, inspection, and repair of welded steel structures.