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Welding Processes & Techniques 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. What is the correct action when a SMAW electrode starts to 'stub' or stick to the base metal?

    Answer: Release the electrode from the holder quickly to break the circuit

    When an electrode stubs, quickly releasing it from the holder breaks the circuit and prevents overheating the electrode and damaging the workpiece.

  2. Which transfer mode in GMAW produces the least spatter and is best suited for out-of-position welding?

    Answer: Pulsed spray transfer

    Pulsed spray transfer alternates between high peak current (spray) and low background current, providing low spatter and out-of-position capability.

  3. In oxyfuel welding, a neutral flame has an oxygen-to-acetylene ratio of approximately:

    Answer: 1:1 (equal volumes)

    A neutral flame uses roughly equal volumes of oxygen and acetylene, producing complete combustion without excess of either gas.

  4. What is the function of the 'purge gas' used on the back side of a stainless steel pipe weld?

    Answer: To protect the inner weld surface from oxidation during welding

    Back purging with argon or nitrogen prevents the inner weld surface (root side) from oxidizing, which would compromise corrosion resistance.

  5. Which welding process is most suitable for joining thin-gauge (under 1/16") sheet metal with minimal distortion?

    Answer: GTAW with low amperage and no filler

    GTAW with low amperage and no filler (autogenous welding) provides the precise heat control needed for thin sheet metal with minimal distortion.

  6. What is 'interpass temperature' and why is it controlled during multi-pass welding?

    Answer: The maximum temperature of the weld area between passes, controlled to affect mechanical properties and prevent cracking

    Interpass temperature is the maximum allowable temperature of the weld joint between passes, controlled to maintain toughness, prevent hydrogen cracking, and control heat input.

  7. During GTAW, contamination of the tungsten electrode by dipping it into the weld pool will most likely cause:

    Answer: Porosity and tungsten inclusions in the weld

    Dipping the tungsten contaminates it with weld metal, causing arc instability, tungsten inclusions in the weld, and possible porosity.