The process of using a magnetic detector to locate cracks is called what?

The process of using a magnetic detector to locate cracks is called what?

• A. Ultrasonic testing
• B. Dye penetrant
• C. Radiography
• D. Magnafluxing

Answer: (D)

Magnetic particle inspection (often called Magnafluxing) is used to locate cracks by magnetizing a ferromagnetic part and applying iron particles. The magnetic field leaks at discontinuities, so the particles gather at cracks and form a visible indication on or near the surface. This method is specifically tied to magnetization, which is why it’s the correct choice when the scenario mentions using a magnetic detector. Ultrasonic testing uses high-frequency sound waves to reveal flaws, dye penetrant relies on a liquid dye entering and outlining surface cracks, and radiography uses X-rays to image internal features. None of these rely on magnetization and magnetic particles, which is the hallmark of Magnafluxing.

Magnetic particle inspection (often called Magnafluxing) is used to locate cracks by magnetizing a ferromagnetic part and applying iron particles. The magnetic field leaks at discontinuities, so the particles gather at cracks and form a visible indication on or near the surface. This method is specifically tied to magnetization, which is why it’s the correct choice when the scenario mentions using a magnetic detector.

Ultrasonic testing uses high-frequency sound waves to reveal flaws, dye penetrant relies on a liquid dye entering and outlining surface cracks, and radiography uses X-rays to image internal features. None of these rely on magnetization and magnetic particles, which is the hallmark of Magnafluxing.