30 Question UT quiz

1. advantage of using ceramic in search units is:

2. The indication on the oscilloscope screen which represents the far boundary of the material being tested is called:

3. The sound that emanates from a piezoelectric transducer originates:

4. Which of the following would make a good couplant?

5. In some inspection procedures the suppression (reject) control is required to be turned off, this is because suppression may:

6. Smith forging and which of the following are recognised metal forging processes:

7. Which type of calibration block is used to determine the resolution of angle beam transducers per requirements of AWS and AASHTO

8. The first critical angle describes the condition where the:

9. The moving of a probe along a test surface either manually or automatically is referred to as:

10. The number of complete waves which pass a given point in a given period of time (usually a second) is referred to as the:

11. All other factors being equal, which of the following modes of vibration has the greatest velocity?

12. The equation describing wavelength in terms of velocity and frequency is:

13. When inspecting course grained material, which of the frequencies below will generate a sound wave that will be most easily scattered?

14. In order to have a reasonable chance at detecting a discontinuity, the reflective surface of the discontinuity must have a dimension of________ of the wave length:

15. The distance of a discontinuity from the ultrasonic transducer cannot be determined when using the:

16. The angle of reflection of a longitudinal wave at an interface:

17. The number of cylces per second is the definition of:

18. The second critical angle is the angle of the incident beam at which:

19. A 6dB change in the measured ultrasonic signal strength indicates that the sound intensity changed by a factor of :

20. An alloyed metal contains:

21. In the far zone of an ultrasonic beam, as the distance from the probe increases, there is:

22. Near surface resolution is a characteristic of an ultrasonic testing system which defines its ability to:

23. Which of the following materials is most likely to produce the greatest amount of sound attenuation over a given distance?

24. Of the following scan types, which one can be used to produce a recording of discontinuity areas superimposed over a plan view of the part.

25. Which type of screen presentation displays the amount of received ultrasonic energy as a function of time?

26. Which type of transducer can be used to scan wide areas when high sensitivity is not required?

27. Resolution generally increases:

28. In general, for a given frequency and in a given material, shear waves are more sensitive to small discontinuities than compressional waves because:

29. Acoustic velocities are primarily determined by:

30. Which of the following waves is only able to travel through a thin section of material?

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