Which examination method records an image by exposing photographic film or sensitized paper?

Which examination method records an image by exposing photographic film or sensitized paper?

• A. Radiographic
• B. Ultrasonic
• C. Liquid Penetrant
• D. Magnetic Particle

Answer: (A)

Radiographic examination records an image by exposing photographic film or sensitized paper with penetrating radiation (X-rays or gamma rays). As the radiation passes through the material, it is absorbed differently by different internal features, and the resulting exposure is developed into a film image that reveals internal weld defects such as cracks, porosity, or inclusions. The other methods use different principles: ultrasonic testing relies on high-frequency sound waves and displays indications on equipment rather than a film image; liquid penetrant reveals surface-breaking defects with dye that is drawn out to the surface and viewed under light; magnetic particle testing uses magnetic fields and iron particles to visualize surface and near-surface flaws, also without producing a film-based image.

Radiographic examination records an image by exposing photographic film or sensitized paper with penetrating radiation (X-rays or gamma rays). As the radiation passes through the material, it is absorbed differently by different internal features, and the resulting exposure is developed into a film image that reveals internal weld defects such as cracks, porosity, or inclusions.

The other methods use different principles: ultrasonic testing relies on high-frequency sound waves and displays indications on equipment rather than a film image; liquid penetrant reveals surface-breaking defects with dye that is drawn out to the surface and viewed under light; magnetic particle testing uses magnetic fields and iron particles to visualize surface and near-surface flaws, also without producing a film-based image.