Welding Final Exam Questions and
Answers | Latest Version | 2024/2025 |
Correct & Verified
Why do welders sometimes stagger their weld beads?
✔✔To reduce heat concentration and minimize distortion in the workpiece.
What is the significance of "wetting" in a weld?
✔✔It ensures the molten metal flows smoothly into the joint for a strong bond.
Why are corners and edges prone to welding defects?
✔✔Because they cool quickly and may not achieve full fusion without proper technique.
What does "cold lap" mean in welding?
✔✔A defect where the weld metal fails to bond properly with the base metal.
Why do welders preheat thick sections of metal?
✔✔To allow even heat distribution and prevent cracking during cooling.
1
,What is a welding ripple?
✔✔The wave-like texture left on the surface of a weld bead.
How can a welder prevent crater cracks?
✔✔By tapering off the arc gradually and filling the crater at the weld's end.
Why is it critical to use the correct polarity in welding?
✔✔The wrong polarity can lead to poor penetration and an unstable arc.
What is the purpose of grinding a weld?
✔✔To remove imperfections, improve appearance, and prepare the surface for additional passes.
Why does interpass temperature matter in multi-pass welding?
✔✔To ensure consistent weld quality and prevent excessive stress between layers.
What does the term "arc blow" refer to?
2
, ✔✔A deflection of the welding arc caused by magnetic forces, often leading to poor weld
quality.
Why do some welders use back gouging?
✔✔To remove material from the root side of a joint for better penetration in the final pass.
What happens if the shielding gas flow rate is too high?
✔✔It can create turbulence, introducing air into the weld and causing porosity.
Why is overlapping considered a welding defect?
✔✔Because excess weld metal extends beyond the joint, weakening the overall structure.
What does it mean to "walk the cup" in TIG welding?
✔✔A technique where the welder uses the cup of the torch to guide the weld for precision.
Why is proper torch angle critical in welding?
✔✔To ensure even heat distribution and proper weld bead formation.
3
Answers | Latest Version | 2024/2025 |
Correct & Verified
Why do welders sometimes stagger their weld beads?
✔✔To reduce heat concentration and minimize distortion in the workpiece.
What is the significance of "wetting" in a weld?
✔✔It ensures the molten metal flows smoothly into the joint for a strong bond.
Why are corners and edges prone to welding defects?
✔✔Because they cool quickly and may not achieve full fusion without proper technique.
What does "cold lap" mean in welding?
✔✔A defect where the weld metal fails to bond properly with the base metal.
Why do welders preheat thick sections of metal?
✔✔To allow even heat distribution and prevent cracking during cooling.
1
,What is a welding ripple?
✔✔The wave-like texture left on the surface of a weld bead.
How can a welder prevent crater cracks?
✔✔By tapering off the arc gradually and filling the crater at the weld's end.
Why is it critical to use the correct polarity in welding?
✔✔The wrong polarity can lead to poor penetration and an unstable arc.
What is the purpose of grinding a weld?
✔✔To remove imperfections, improve appearance, and prepare the surface for additional passes.
Why does interpass temperature matter in multi-pass welding?
✔✔To ensure consistent weld quality and prevent excessive stress between layers.
What does the term "arc blow" refer to?
2
, ✔✔A deflection of the welding arc caused by magnetic forces, often leading to poor weld
quality.
Why do some welders use back gouging?
✔✔To remove material from the root side of a joint for better penetration in the final pass.
What happens if the shielding gas flow rate is too high?
✔✔It can create turbulence, introducing air into the weld and causing porosity.
Why is overlapping considered a welding defect?
✔✔Because excess weld metal extends beyond the joint, weakening the overall structure.
What does it mean to "walk the cup" in TIG welding?
✔✔A technique where the welder uses the cup of the torch to guide the weld for precision.
Why is proper torch angle critical in welding?
✔✔To ensure even heat distribution and proper weld bead formation.
3
