Question

X-ray testing in materials inspection is primarily used to detect

• A. Sub-Surface defects such as cracks, voids and inclusions
• B. Surface hardness variations
• C. Tensile strength of the material
• D. Corrosion rate on the surface

Hint:

X-ray = Internal/Sub-surface. Just like a medical X-ray sees bones inside the body, industrial X-rays see defects inside the metal.

Answer 1

The Correct Option is A

Step 1: Concept Radiographic testing (RT) is a non-destructive testing (NDT) method that uses X-rays or Gamma rays.

Step 2: Meaning These high-energy waves can penetrate solid materials and produce an image on a film or detector.

Step 3: Analysis While visual or dye-penetrant tests find surface defects, X-rays reveal internal discontinuities that are not visible from the outside.

Step 4: Conclusion Therefore, X-ray testing is primarily used to identify internal, sub-surface defects like cracks, voids, and inclusions. Final Answer: (A)