Non-destructive Evaluation Activity 1. What two non-destructive tests can detect flaws and cracks deep inside a workpiece? a) Radiographic and penetrant tests b) Ultrasonic and penetrant tests (c) Radiographic and ultrasonic tests d) Ultrasonic and magnetic particle tests

Radiographic testing uses high-energy radiation, like X-rays or gamma rays, to penetrate the workpiece and produce an image on a film or detector, revealing internal flaws. This method is particularly effective for detecting cracks that may not be visible on the surface, making it a key player in industries like aerospace and manufacturing where integrity is crucial. Ultrasonic testing, on the other hand, employs high-frequency sound waves that are introduced into the workpiece. The sound waves bounce back upon hitting flaws or boundaries within the material, giving inspectors a real-time view of any cracks or irregularities deep inside. This technique is widely appreciated for its precision and ability to be applied on various materials.