Q. Which of the following can be a source of spurious ultrasonic signals? (Solved)
1. Surface roughness of the test piece
2. Mode conversion within the test piece
3. Shape or contour of the test piece
4. All of the above
- d. All of the above
1. Surface roughness of the test piece
2. Mode conversion within the test piece
3. Shape or contour of the test piece
4. All of the above