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Welding Process Application Flashcards

7 cards from real Certified Welder 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. Which condition would cause porosity in a GMAW weld?

    Answer: All of the above

    Porosity can result from excessive turbulence (too-high gas flow), contaminants releasing gas into the weld pool, or drafts disturbing shielding gas coverage.

  2. The term 'keyhole' welding technique is associated with which process operating at high power?

    Answer: Plasma Arc Welding (PAW) and Laser Beam Welding (LBW)

    Keyhole welding is used in high-energy-density processes like PAW and LBW, where the beam fully penetrates the material and the molten metal flows around a cylindrical void.

  3. An E7018 electrode in SMAW is classified as a:

    Answer: Low-hydrogen, iron powder electrode suitable for all positions

    E7018 is a low-hydrogen, iron powder electrode rated for all positions that produces a sound, ductile weld when kept dry.

  4. What is the main reason preheating is applied before welding high-carbon or alloy steels?

    Answer: To reduce the cooling rate and prevent hydrogen-induced cracking in the HAZ

    Preheating slows the cooling rate of the heat-affected zone (HAZ), reducing the risk of martensite formation and hydrogen-induced (cold) cracking.

  5. In GMAW, increasing wire feed speed (WFS) without changing voltage will primarily:

    Answer: Increase amperage (current) and decrease arc length

    In constant-voltage GMAW, faster WFS causes more wire to enter the arc, increasing current consumption and shortening the arc length.

  6. Which welding process is most appropriate for joining dissimilar metals such as copper to steel?

    Answer: Friction Welding

    Friction welding uses frictional heat and pressure rather than a molten pool, making it effective for joining dissimilar metals that are otherwise metallurgically incompatible.

  7. A welder notices the weld bead is too narrow and convex. The most likely corrective action is to:

    Answer: Decrease travel speed and/or increase voltage

    A narrow, convex bead indicates insufficient heat input; slowing travel speed and/or raising voltage spreads and flattens the bead.