Block 6: MIG Welding Exam Questions
and Answers 100% Pass
Occurs when arc doesn't melt base metal sufficiently and puddle flows onto unmelted
base metal. Happens when puddle is too large. - ✔✔Cold lap (overlap)
For an overhead position lap joint you travel smoothly and evenly to ensure -
✔✔Penetration
Comes from removing gun and shielding gas before puddle solidifies - ✔✔Crater
porosity and cracks
Welding method where arc extinguishes and arc again at 20-200 times per second,
shallow penetration, makes small puddles - ✔✔Short circuiting transfer
Welding method used where gravity could be a factor. Small metal droplets through arc
- ✔✔Spray arc transfer
How many degrees should you tilt your work when welding in flat position? - ✔✔10-20
degrees
What metals are used for weld backing? - ✔✔Copper blocks, strips and bars, carbon
block, fired clay. Cooper is most common
Wire guides are made of what? What does it reduce? - ✔✔Nylon or Teflon; reduces
friction and wire sharing
COPYRIGHT © 2025 BY KATELYN WHITMAN, ALL RIGHTS RESERVED 1
and Answers 100% Pass
Occurs when arc doesn't melt base metal sufficiently and puddle flows onto unmelted
base metal. Happens when puddle is too large. - ✔✔Cold lap (overlap)
For an overhead position lap joint you travel smoothly and evenly to ensure -
✔✔Penetration
Comes from removing gun and shielding gas before puddle solidifies - ✔✔Crater
porosity and cracks
Welding method where arc extinguishes and arc again at 20-200 times per second,
shallow penetration, makes small puddles - ✔✔Short circuiting transfer
Welding method used where gravity could be a factor. Small metal droplets through arc
- ✔✔Spray arc transfer
How many degrees should you tilt your work when welding in flat position? - ✔✔10-20
degrees
What metals are used for weld backing? - ✔✔Copper blocks, strips and bars, carbon
block, fired clay. Cooper is most common
Wire guides are made of what? What does it reduce? - ✔✔Nylon or Teflon; reduces
friction and wire sharing
COPYRIGHT © 2025 BY KATELYN WHITMAN, ALL RIGHTS RESERVED 1
