Certification Test Module 9: Welding
Inspection and Test Principles
Questions and Answers | Latest Version
| 2024/2025 | Graded A+
What is the primary purpose of a welding inspection?
✔✔ To ensure the weld meets specified quality and design standards.
Why is visual inspection important in welding?
✔✔ It allows for the identification of surface defects such as cracks, porosity, or incomplete
fusion.
When should a visual inspection typically be performed during the welding process?
✔✔ Before, during, and after welding.
What is a weld discontinuity?
✔✔ An irregularity in the weld that may or may not affect its performance.
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, What is the difference between a weld defect and a discontinuity?
✔✔ A defect is a discontinuity that makes the weld unacceptable according to the standards or
specifications.
What tool is commonly used to measure weld size?
✔✔ A fillet weld gauge.
Why is pre-weld inspection necessary?
✔✔ To verify that the base materials, joint preparation, and equipment meet the required
specifications.
How is undercut identified in a weld?
✔✔ By observing a groove melted into the base metal adjacent to the weld bead.
What is the purpose of a non-destructive testing (NDT) method like radiographic testing?
✔✔ To detect internal weld defects without damaging the weld.
What does a porosity defect in a weld look like?
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