Q. When a casting is being non destructively examined for critical service, and thepossibility of cracks exists, which of the following techniques would be best? (Solved)
1. X ray radiography at 200 kV or less
2. Magnetic Particle or Liquid Penetrant testing
3. Radiography (X or gamma ray, depending on the thickness)
4. Radiography and either Magnetic Particle or liquid Penetrant testing
- b. Magnetic Particle or Liquid Penetrant testing