Welding Level 2, Module 8 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified

Welding Level 2, Module 8 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified What is the purpose of a welding procedure specification (WPS)? A WPS provides detailed instructions to ensure welds meet specific quality and safety standards. Why is preheating often required before welding certain metals? Preheating reduces the risk of cracking by minimizing thermal stress and ensuring even heat distribution. What is the role of flux in welding? Flux shields the weld from atmospheric contamination and improves the quality of the weld joint. How does a welder determine the correct amperage for a specific weld? Amperage is determined by the thickness of the material, type of electrode, and welding process. 2 What is the purpose of a root pass in welding? A root pass ensures proper penetration and establishes the foundation for subsequent weld layers. Why is proper ventilation important when welding? Proper ventilation removes harmful fumes and gases, protecting the welder's health. What causes porosity in a weld? Porosity is caused by trapped gas pockets due to contamination, inadequate shielding, or improper technique. What is the significance of using a backing strip in welding? A backing strip provides support for the root pass and ensures complete joint penetration. Why is it necessary to clean the base metal before welding? Cleaning removes contaminants like rust, oil, and dirt, which can weaken the weld. What is the role of post-weld heat treatment? 3 Post-weld heat treatment relieves residual stress, reduces hardness, and improves the weld's mechanical properties. What does the term "weld bead profile" refer to? Weld bead profile describes the shape and size of the deposited weld metal. Why is electrode storage and handling critical in welding? Proper storage prevents electrodes from absorbing moisture, which can lead to defects like hydrogen-induced cracking.