Welding Level 2, Module 9 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified
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Module
Welding Level 2, Module 9
Institution
Welding Level 2, Module 9
Welding Level 2, Module 9 Questions
and Answers | Latest Version | 2024/2025
| Correct & Verified
What causes weld porosity, and how can it be avoided?
Porosity is caused by trapped gas in the weld pool, which can be avoided by ensuring proper
shielding gas flow and cleaning the base mate...
Welding Level 2, Module 9 Questions
and Answers | Latest Version | 2024/2025
| Correct & Verified
What causes weld porosity, and how can it be avoided?
✔✔ Porosity is caused by trapped gas in the weld pool, which can be avoided by ensuring proper
shielding gas flow and cleaning the base material.
How does the welding speed affect the weld bead profile?
✔✔ The welding speed affects the bead size and shape; too fast can lead to undercut or
incomplete fusion, while too slow can cause excessive reinforcement or burn-through.
Why is it important to control heat input during welding?
✔✔ Controlling heat input prevents overheating, which can cause warping, distortion, or the
degradation of metal properties.
What is a weld root and why is it important?
✔✔ The weld root is the deepest part of the weld joint, and it must be properly filled to ensure
full penetration and a strong bond between the base materials.
1
, How does the angle of the torch affect the weld pool?
✔✔ The angle of the torch controls the shape and size of the weld pool; a proper angle ensures
smooth, consistent bead formation.
What is the difference between a root pass and a cover pass in multi-pass welding?
✔✔ The root pass establishes the base of the weld, ensuring proper penetration, while the cover
pass adds strength and smooths the weld surface.
What is the impact of welding in an overhead position?
✔✔ Welding in an overhead position increases the risk of weld defects such as excessive spatter
and poor bead formation due to gravity's effect on the molten metal.
Why is it necessary to cool down the welded metal gradually?
✔✔ Gradual cooling prevents rapid contraction, which could lead to cracking or distortion in the
welded joint.
What are some common welding defects that can compromise the strength of a weld?
✔✔ Common defects include porosity, cracks, undercut, and lack of fusion, all of which can
weaken the welded joint if not properly addressed.
2
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