Practice Test Geeks(SAW) Submerged Arc Welding Certification Practice Test
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Electrical Systems & Wiring 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 Electrical Systems & Wiring flashcards as text

  1. In a tandem SAW setup, using DC lead / AC trail configuration primarily helps to:

    Answer: Reduce magnetic arc blow while maintaining high deposition rates

    The DC lead provides deep penetration while the AC trail reduces magnetic arc blow interference between the two closely spaced arcs.

  2. What is the effect of increasing wire electrode diameter on the electrical parameters required for equivalent current density in SAW?

    Answer: Higher amperage is required to maintain the same current density

    Larger diameter wire has more cross-sectional area, requiring higher amperage to achieve the same current density as a smaller wire.

  3. Which instrument is used to measure actual welding amperage during SAW production welding?

    Answer: Clamp-type ammeter placed around the welding cable

    A clamp-type (Hall-effect) ammeter placed around the welding cable measures current without interrupting the circuit.

  4. When a SAW power source is set to constant voltage mode and wire speed increases, what happens to the welding current?

    Answer: Current increases because more wire is being melted at the fixed arc voltage

    In CV mode, faster wire feed shortens the arc, which the power source compensates by supplying more current to melt the additional wire.

  5. Electrical grounding of the SAW welding fixture or positioner is important primarily to:

    Answer: Prevent stray current from passing through bearings or gear teeth, causing arc damage

    Stray welding current through ungrounded positioner bearings or gears can cause severe electrical pitting and premature mechanical failure.

  6. What does a 'duty cycle rating' of 100% at 600A on a SAW power source mean?

    Answer: The source can continuously deliver 600A without overheating under rated conditions

    A 100% duty cycle at 600A means the power source can deliver that current continuously without requiring a cool-down period.

  7. In SAW, which condition most commonly causes the electrode wire to 'burn back' and fuse to the contact tip?

    Answer: Momentary loss of wire feed while current continues to flow

    If wire feeding stops or hesitates while current flows, the stationary wire overheats and melts back into the contact tip, fusing them together.