Magnetic Particle Inspection Level 1 Practice Exam

The commonly used type of magnetic particle for Magnetic Particle Inspection (MPI) is iron oxide particles. These particles have the essential property of responding to magnetic fields, allowing them to cluster at discontinuities in ferromagnetic materials. When these particles are applied to a surface that has been magnetized, they can reveal surface and near-surface defects by forming a visible indication at the sites of magnetic flux leakage, such as cracks or voids.

Iron oxide particles are effective because they are specifically engineered to have the right size and magnetic properties, ensuring that they can effectively highlight defects during the inspection process. Their use is prevalent because they give a good contrast against the inspected surface, which helps in detecting defects more easily. This makes them suitable for a variety of materials and applications in industries requiring reliable inspections, such as aerospace, automotive, and manufacturing.