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Gas Metal Arc Welding (MIG) Questions and Answers Graded A+
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Gas Metal Arc Welding (MIG) Questions and Answers Graded A+ Why is the arc in MIG welding often referred to as a "continuous spark"? Because the electrode wire is fed continuously, maintaining a steady arc without breaks during welding. How does changing the shielding gas mix affect the ...

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  • October 24, 2024
  • 9
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • gas metal arc welding mig questions and answers

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Gas Metal Arc Welding (MIG) Questions
and Answers Graded A+
Why is the arc in MIG welding often referred to as a "continuous spark"?


✔✔Because the electrode wire is fed continuously, maintaining a steady arc without breaks

during welding.




How does changing the shielding gas mix affect the MIG weld quality?


✔✔Different gas mixes, like CO2 or Argon, can alter weld penetration, bead appearance, and

spatter levels.




Why is it important to maintain the correct electrode stickout in MIG welding?


✔✔The right stickout helps control heat input and ensures consistent arc stability and weld

penetration.




What could happen if the wire feed speed is set too high during MIG welding?


✔✔Excessive wire feed speed can lead to burnback or excessive spatter, compromising weld

quality.




1

, What advantage does pulsed MIG welding offer over traditional MIG?


✔✔Pulsed MIG reduces heat input, allowing for better control and less distortion, especially on

thinner materials.




How does using a larger diameter contact tip impact the welding process?


✔✔A larger tip can result in less precise current transfer, potentially leading to arc instability and

wider beads.




Why might a welder experience "worm tracks" in their MIG welds, and how can this be avoided?


✔✔Worm tracks are caused by trapped gases escaping the weld, often due to poor shielding gas

coverage or dirty base metal.




What is the purpose of the drive rolls in a MIG welder, and how can improper adjustment affect

welding?


✔✔Drive rolls feed the wire smoothly, and improper adjustment can cause wire slippage or

deformation, affecting arc performance.




Why is it critical to maintain a consistent gun angle during MIG welding?




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