What is the main advantage of using a magnifying glass during weld inspection?

The main advantage of using a magnifying glass during weld inspection is that it enhances the visibility of small defects. Magnifying glasses are optical tools that enlarge the appearance of objects, making it easier for inspectors to identify minute flaws, cracks, or inclusions that may not be visible to the naked eye. This heightened visibility is crucial in ensuring the integrity and safety of welded joints, as even minor defects can compromise the strength and reliability of the weld.

While illumination, depth measurement, and cleaning might be relevant activities in the context of weld inspection, they are not primary functions of a magnifying glass. Magnifying glasses do not provide light (illumination), they don't inherently allow for measuring depth accurately, and they are not designed for cleaning surfaces. Therefore, enhancing visibility of small defects is the critical advantage that makes a magnifying glass an effective tool in the weld inspection process.