Exam Question
Write short notes on the following:
(a) Magnetic Particle Inspection (MPI)
(b) Ultrasonic Testing (UT).
(c) Radiographic Testing (RI).
Class 2 (2nd Engineer)
MEP
📅 Jan 2020
Reference Answer
(a) Magnetic Particle Testing
Used to detect surface and near-surface flaws in ferromagnetic materials (iron, steel, etc.). The material is magnetized, and finely divided ferromagnetic particles (iron powder) are applied to its surface. Flaws disrupt the magnetic field, causing the particles to accumulate at the defect locations, making them visible.
Advantages:
Sensitive method for finding small or shallow surface and subsurface cracks
Used to detect surface and near-surface flaws in ferromagnetic materials (iron, steel, etc.). The material is magnetized, and finely divided ferromagnetic particles (iron powder) are applied to its surface. Flaws disrupt the magnetic field, causing the particles to accumulate at the defect locations, making them visible.
Advantages:
Sensitive method for finding small or shallow surface and subsurface cracks
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