Welding Level 2, Module 6 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified
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Module
Welding Level 2, Module 6
Institution
Welding Level 2, Module 6
Welding Level 2, Module 6 Questions
and Answers | Latest Version | 2024/2025
| Correct & Verified
What is the main purpose of preheating metal before welding?
Preheating reduces the risk of cracking by minimizing the temperature difference between
the weld and the base metal.
Why is pr...
Welding Level 2, Module 6 Questions
and Answers | Latest Version | 2024/2025
| Correct & Verified
What is the main purpose of preheating metal before welding?
✔✔ Preheating reduces the risk of cracking by minimizing the temperature difference between
the weld and the base metal.
Why is proper electrode storage important in welding?
✔✔ Proper storage prevents electrodes from absorbing moisture, which can lead to porosity in
the weld.
What is the function of a backing strip in welding?
✔✔ A backing strip supports the molten weld metal and prevents it from falling through the
joint.
How can you ensure a clean weld surface before starting?
✔✔ Remove dirt, rust, oil, and other contaminants from the weld area to ensure proper fusion.
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, What happens if you use excessive heat during welding?
✔✔ Excessive heat can weaken the weld, cause warping, and increase the risk of defects like
undercutting.
Why is controlling the travel speed important during welding?
✔✔ Post-weld heat treatment relieves residual stresses and improves the weld's mechanical
properties.
Why is shielding gas important in welding?
✔✔ Shielding gas protects the weld pool from atmospheric contamination like oxygen and
nitrogen.
What causes porosity in a weld?
✔✔ Porosity is caused by trapped gas pockets, often due to contaminants or improper shielding
gas coverage.
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