MIG CH 1&2 QUESTIONS AND
ANSWERS 100% PASS
What is the impact of rust or contaminants on the welding surface?
Rust and contaminants can weaken the weld joint and lead to poor weld quality.
How do you determine the correct polarity for a MIG welding setup?
The correct polarity is typically ...
MIG CH 1&2 QUESTIONS AND
ANSWERS 100% PASS
What is the impact of rust or contaminants on the welding surface?
✔✔Rust and contaminants can weaken the weld joint and lead to poor weld quality.
How do you determine the correct polarity for a MIG welding setup?
✔✔The correct polarity is typically indicated in the welder's manual based on the type of
electrode used.
What is a common sign of overheating the base material during welding?
✔✔A common sign of overheating is excessive warping or burning through the material.
What is the purpose of the contact tip in a MIG welding gun?
✔✔The contact tip delivers electrical current to the welding wire and helps maintain the arc.
How can you avoid arc blow when welding?
✔✔Arc blow can be avoided by maintaining proper grounding and adjusting the workpiece
positioning.
1
, What are the main advantages of MIG welding compared to other welding processes?
✔✔MIG welding offers high speed, ease of use, and versatility in welding various materials.
How often should MIG welding equipment be inspected for maintenance?
✔✔MIG welding equipment should be inspected regularly, typically before each use, for wear
and proper function.
What factors should be considered when selecting filler metal for MIG welding?
✔✔Consider the base metal type, thickness, and desired mechanical properties when selecting
filler metal.
What does the term "spatter" refer to in MIG welding?
✔✔Spatter refers to small droplets of molten metal that are expelled during the welding process,
often requiring cleanup.
How can the welder control the appearance of the weld bead?
✔✔Adjusting parameters like voltage, wire feed speed, and travel speed helps control the
appearance of the weld bead.
2
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