Welding Skills Chapter 9 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified
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Welding Skills Chapter 9
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Welding Skills Chapter 9
Welding Skills Chapter 9 Questions and
Answers | Latest Version | 2024/2025 |
Correct & Verified
What is the primary purpose of joint preparation in welding?
To ensure proper fit-up and achieve full penetration or fusion in the weld.
Why is cleanliness important when preparing a joint f...
Welding Skills Chapter 9 Questions and
Answers | Latest Version | 2024/2025 |
Correct & Verified
What is the primary purpose of joint preparation in welding?
✔✔ To ensure proper fit-up and achieve full penetration or fusion in the weld.
Why is cleanliness important when preparing a joint for welding?
✔✔ Contaminants like oil, rust, and paint can cause weld defects such as porosity or inclusions.
What is the function of a tack weld?
✔✔ To hold parts of the joint in place temporarily during welding.
What is the purpose of beveling the edges of thick materials?
✔✔ To create a groove for better penetration and fusion of the weld.
How does preheating help in welding thick materials?
✔✔ It reduces the risk of cracking by slowing down the cooling rate.
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, What is the heat-affected zone (HAZ) in welding?
✔✔ The area of base metal adjacent to the weld that is altered by the heat of welding.
Why is post-weld cleaning important?
✔✔ To remove slag, spatter, and other contaminants that could affect the appearance and quality
of the weld.
What is a weld discontinuity?
✔✔ An interruption in the weld, such as porosity or undercut, that may affect its performance.
What is the difference between a lap joint and a butt joint?
✔✔ A lap joint overlaps two pieces of metal, while a butt joint joins two pieces edge to edge.
What causes porosity in a weld?
✔✔ Gas trapped in the weld metal due to contamination or improper shielding.
Why is it important to control the travel speed during welding?
✔✔ Too fast or slow travel speed can result in defects like lack of fusion or excessive heat input.
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