AWS Welding Inspection and Testing Certification Practice Test 2025 - Free Welding Certification Practice Questions and Study Guide

Question: 1 / 400

What does the term 'porosity' refer to in welding?

The presence of fractures in the weld

The melting point of the base material

The presence of tiny gas pockets in a weld

Porosity in welding refers to the presence of tiny gas pockets or voids that can form within a weld bead during the solidification process. These gas pockets may be caused by various factors, such as moisture, contamination, or the decomposition of certain materials during the welding process. The formation of porosity can weaken the weld joint and affect its overall integrity, making it essential for welders and inspectors to be vigilant in identifying and addressing this defect.

Understanding porosity is crucial for ensuring high-quality welds, as it may lead to failure under stress or adverse conditions. Effective measures to prevent porosity include ensuring proper cleaning of materials before welding, controlling the welding environment to reduce moisture exposure, and selecting appropriate welding parameters.

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The temperature range during welding

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