114 MiG Final Exam Questions and Answers 100% Pass
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Module
114 MiG
Institution
114 MiG
114 MiG Final Exam Questions and
Answers 100% Pass
What is the primary difference between MIG and TIG welding?
MIG welding uses a continuously fed wire as an electrode, while TIG welding uses a non-
consumable tungsten electrode.
How does the choice of shielding gas impact the appearan...
114 MiG Final Exam Questions and
Answers 100% Pass
What is the primary difference between MIG and TIG welding?
✔✔MIG welding uses a continuously fed wire as an electrode, while TIG welding uses a non-
consumable tungsten electrode.
How does the choice of shielding gas impact the appearance of the weld?
✔✔Different shielding gases can affect the color, bead shape, and overall quality of the weld.
What does the term "travel speed" refer to in MIG welding?
✔✔Travel speed refers to the speed at which the welder moves the welding torch along the joint.
How can improper joint preparation affect MIG welding results?
✔✔Poor joint preparation can lead to incomplete fusion and weak welds.
What is the purpose of back purging in MIG welding?
✔✔Back purging helps to protect the backside of the weld from contamination when welding
materials like stainless steel.
1
,How do different types of metal affect MIG welding parameters?
✔✔Different metals require adjustments in voltage, amperage, and gas mixture for optimal
welding.
What is the effect of a too-long arc length during MIG welding?
✔✔A too-long arc length can result in poor penetration and a wider weld bead.
What safety equipment is essential for MIG welding?
✔✔Essential safety equipment includes a welding helmet, gloves, and flame-resistant clothing.
How does ambient temperature influence MIG welding?
✔✔Higher ambient temperatures can affect the cooling rate of the weld, potentially altering its
properties.
What is the typical range for gas flow rates in MIG welding?
✔✔Typical gas flow rates range from 15 to 25 cubic feet per hour (CFH).
2
, Why is it important to use clean filler wire in MIG welding?
✔✔Using clean filler wire prevents contamination and improves weld quality.
What is the main purpose of the welding gun nozzle?
✔✔The welding gun nozzle directs shielding gas over the weld pool to protect it from
contamination.
What might excessive heat input during welding cause?
✔✔Excessive heat input can lead to warping and distortion of the base metal.
How can the angle of the welding torch affect the weld?
✔✔The torch angle can influence penetration, bead shape, and the overall weld appearance.
What is the ideal position for MIG welding flat plates?
✔✔The ideal position for welding flat plates is usually at a 90-degree angle to the surface for
optimal penetration.
What does the term "burn-through" mean in MIG welding?
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