Magnetic Particle Inspection Level 2 Practice Exam

A magnetic discontinuity is related to a sudden change in which property?

1. Inductance

2. Resistivity

3. Capacitance

4. Permeability

The correct answer is: Permeability

A magnetic discontinuity is primarily related to a sudden change in permeability. Permeability is a material property that indicates how readily a material can be magnetized or how well it can conduct a magnetic field. When there is a discontinuity in the material, such as a crack, void, or other defect, the permeability changes abruptly. This alteration affects how the magnetic field behaves in that region. In the context of magnetic particle inspection, the detection of these discontinuities is crucial as they can indicate flaws in the material that may compromise its integrity. The magnetic particles used in this testing method concentrate at these discontinuities, allowing for their visibility and further analysis. Understanding permeability and its significance in identifying magnetic discontinuities helps ensure accurate assessments in various applications, including structural and materials testing. This concept is essential for practitioners of magnetic particle inspection, especially at higher levels of certification.