30 Question UT quiz

1. A loss of reflected ultrasonic signal may be due to:

2. The transducers most commonly found in ultrasonic search units used for discontinuity testing utilize:

3. Defects are generally known as volumetric or planar and it is considered that:

4. Contact transducers are used for direct contact inspections, and are generally:

5. The sound energy or ultrasonic beam is more uniform in the:

6. Angle beam transducers and wedges are typically used to introduce a:

7. When sound travels through a medium:

8. Defects open to the surface are more dangerous than the same defect buried within the body of the component because:

9. You find indications in the test part that you cannot explain. What do you do?

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

11. Which of the following determines how much sound is reflected at an interface:

12. When performing a contact inspection on a curved surface, what pieced of equipment can be used to improve coupling?

13. The purpose of the backing material in a transducer is to:

14. Increasing the frequency of an ultrasonic longitudinal wave will result in ___________in the velocity of that wave.

15. Within a given material, the speed of sound:

16. Which material properties affect the speed of sound within a material?

17. When an ultrasonic beam passes through the interface of two dissimilar materials at an angle, a new mode of sound travel is changed due to:

18. The frequency marked on a transducer indicates:

19. advantage of using ceramic in search units is:

20. What is the material called that is used to improve the transmission of ultrasonic sound energy from the transducer into the part

21. When an ultrasound wave passes through an interface between two materials at an oblique angle, and the materials have different velocites, the following occurs:

22. Which type of screen presentation displays a plan-type view of the location and size of the test specimen features?

23. Mode conversion, occurs when a sound wave encounters an interface between materials of different acoustic impedance and:

24. Air is not a good transmitter of ultrasound because:

25. The acoustic impedance of materials is used to:

26. When a single element transducer is operating in the pulse echo mode, the element:

27. The active element of most acoustic transducers used today is:

28. The maximum height of an indication obtainable from a given size small discontinuity on an A-scan ultrasonic instrument can be used to determine:

29. Couplant displaces the__________ and makes it possible to get more sound energy into the test specimen.

30. The total resistance that the cable presents to the electrical current passing through it is called:

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