Magnetic Particle Inspection Level 2 Practice Exam

What can cause nonmetallic inclusions in the magnetic particle inspection process?

1. High temperatures

2. Welding fluxes

3. Slag pockets

4. Surface scratches

The correct answer is: Slag pockets

Nonmetallic inclusions can significantly impact the magnetic particle inspection process, and in this context, slag pockets are a notable source of such inclusions. Slag is a byproduct formed during the welding process, created from the flux materials used to protect the weld area from oxidation. If remnants of this slag are not properly cleaned from the surface, they can become embedded and create nonmetallic inclusions. These inclusions can interfere with the magnetic field during the inspection, leading to false indications or masking defects, thus affecting the reliability of the inspection results. While high temperatures and welding fluxes do play roles in the overall welding and material processes, they do not specifically result in nonmetallic inclusions, nor do surface scratches, which are more related to surface defects rather than incorporation of foreign materials. Understanding the implications of slag pockets helps technicians mitigate potential inspection errors and ensures a more accurate evaluation of the material integrity.