Practice Test Geeks(SAW) Submerged Arc Welding Certification Practice Test
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Transmission & Drivetrain Systems 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 Transmission & Drivetrain Systems flashcards as text

  1. When applying SAW to rebuild worn drive shaft journals, which parameter most directly controls heat input to minimize distortion?

    Answer: Travel speed

    Travel speed is the primary control for heat input per unit length, and faster travel reduces total heat delivered to the journal.

  2. A transmission housing weld made with SAW shows porosity concentrated at weld start locations. The most likely cause is:

    Answer: Contaminated flux at run-on tabs

    Flux at run-on tabs can absorb moisture or contaminants, releasing gas into the first molten pool and causing start porosity.

  3. SAW overlays on ring gear blanks require low dilution to preserve hardfacing alloy composition. Which technique best achieves this?

    Answer: Use electrode negative (DCEN) polarity

    DCEN polarity concentrates more heat at the wire tip, producing shallower penetration and lower dilution of the base metal.

  4. A differential carrier housing requires a circumferential SAW weld. The correct torch positioning for a horizontal rotating fixture is:

    Answer: Slightly before 12 o'clock against rotation

    Positioning the torch slightly behind top-dead-center against rotation lets gravity help pool control and prevents the molten metal from running ahead of the arc.

  5. Which flux characteristic is most critical when SAW welding high-carbon drivetrain shafts to avoid hydrogen cracking?

    Answer: High basicity index

    A high basicity index flux produces lower weld metal hydrogen levels, reducing the risk of hydrogen-induced cracking in high-carbon steels.

  6. When SAW is used to weld heavy-wall axle tube sections, which preheat factor is most important for crack prevention?

    Answer: Base metal carbon equivalent

    Carbon equivalent (CE) of the axle steel determines hardenability and therefore the minimum preheat temperature needed to avoid cold cracking.

  7. After SAW rebuild of a transmission input shaft, which post-weld practice is most important before machining?

    Answer: Stress relief heat treatment

    Stress relief heat treatment reduces residual stresses from the weld deposit, preventing distortion or cracking during subsequent machining operations.