Practice Test Geeks(SAW) Submerged Arc Welding Certification Practice Test
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Metallurgy & Weld Quality Inspection Flashcards

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

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

  1. What solidification mode produces the most favorable microstructure for corrosion resistance in stainless steel SAW welds?

    Answer: Primary ferrite with austenite transformation

    Primary ferrite solidification (FA mode) results in a weld containing 3–8% delta ferrite, which resists hot cracking and improves corrosion resistance.

  2. Lamellar tearing in heavy plate SAW fabrication is most likely caused by:

    Answer: Low-toughness inclusions oriented parallel to the plate surface

    Lamellar tearing occurs when through-thickness shrinkage stresses tear the base metal along elongated manganese sulfide or oxide inclusions lying parallel to the rolled surface.

  3. In radiographic testing of SAW welds, porosity appears on the film as:

    Answer: Dark rounded spots

    Porosity appears as dark, rounded spots on radiographic film because gas voids allow more X-ray transmission than surrounding solid metal.

  4. The purpose of postweld heat treatment (PWHT) stress relief is primarily to:

    Answer: Reduce residual stresses and temper the HAZ

    PWHT at sub-critical temperatures reduces residual welding stresses and tempers hard microstructures in the HAZ, improving toughness and reducing cracking risk.

  5. Which SAW flux type is most prone to moisture pickup and requires the strictest storage and rebaking procedures?

    Answer: Bonded (agglomerated) flux

    Bonded fluxes are manufactured with binders and have higher porosity, making them more susceptible to moisture absorption than fused fluxes.

  6. A weld acceptance criterion requires an undercut depth not to exceed 1/32 in. This limit is specified because:

    Answer: Undercut creates a notch that reduces fatigue life

    Undercut along the weld toe creates a mechanical notch that concentrates stress and significantly reduces the fatigue life of the welded joint.

  7. During macro-etch examination of a SAW cross section, what does a lack of root fusion appear as?

    Answer: An unfused linear gap at the joint interface

    Lack of root fusion shows as a linear, unfused gap or seam at the root where the weld metal did not bond with the base metal.