Magnetic Particle Testing uses one or more magnetic fields to locate surface and near-surface discontinuities in ferromagnetic materials. The magnetic field can be applied with a permanent magnet or an electromagnet. When using an electromagnet, the field is present only when the current is being applied. When the magnetic field encounters a discontinuity transverse to the direction of the magnetic field, the flux lines produce a magnetic flux leakage field of their own.
Magnetic Particle Testing (MT) Level III
Introduction
References
The number in parentheses following each reference is the ASNT catalog number.
Course Outline
This examination is 2 hrs in length, having 90 questions of equal value.