The GATE Grind

GATE 2023 MT – Question 28

Manufacturing Processes · Non-destructive testing · 1 mark · Multiple select

The non-destructive testing technique(s) for detecting internal defects in a steel component is/are

  1. X-ray tomography
  2. Ultrasonic technique
  3. Gamma radiography
  4. Dye penetrant technique

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Show answer and explanation

Correct answer: (A) X-ray tomography; (B) Ultrasonic technique; (C) Gamma radiography

Explanation

X-ray tomography reconstructs interior attenuation, ultrasonic inspection detects reflected waves from internal flaws, and gamma radiography reveals internal attenuation changes. Dye penetrant requires a surface opening.

Hence **A,B,C**.