Which nondestructive testing method would detect internal weld flaws without cutting the metal?

Which nondestructive testing method would detect internal weld flaws without cutting the metal?

• A. Radiographic examination
• B. Visual inspection
• C. Dye penetrant examination
• D. Magnetic particle inspection

Answer: (A)

Detecting internal weld flaws without cutting relies on using penetrating radiation to view inside the weld. Radiographic examination sends X-rays or gamma rays through the weld and records how much passes through, producing an image that reveals internal features such as porosity, cracks, or slag inclusions. This method doesn't require disassembling the weld, so you can inspect the interior while the metal remains intact. Other methods shown focus on surfaces or near-surface areas (visual inspection only sees surface features; dye penetrant highlights surface-breaking defects by seeping into openings; magnetic particle detects surface and near-surface discontinuities in ferromagnetic materials). Because radiography can reveal hidden internal flaws without cutting, it’s the best choice for this purpose.

Detecting internal weld flaws without cutting relies on using penetrating radiation to view inside the weld. Radiographic examination sends X-rays or gamma rays through the weld and records how much passes through, producing an image that reveals internal features such as porosity, cracks, or slag inclusions. This method doesn't require disassembling the weld, so you can inspect the interior while the metal remains intact. Other methods shown focus on surfaces or near-surface areas (visual inspection only sees surface features; dye penetrant highlights surface-breaking defects by seeping into openings; magnetic particle detects surface and near-surface discontinuities in ferromagnetic materials). Because radiography can reveal hidden internal flaws without cutting, it’s the best choice for this purpose.