30 Question UT quiz

1. Surface waves are used to detect discontinuities in the test materials:

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

3. Snell’s Law describes the relationship between the sound velocity and:

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

5. In an A-scan presentation, the amplitude of vertical indications on the screen represents:

6. Ultrasound is generally defined as sound at frequency above the threshold of human hearing, which is?

7. What law can be used to calculate the angle of refraction within a metal for both longitudinal and shear waves?

8. When sound travels through a medium:

9. When examining thin materials for planar discontinuities oriented parallel to the part surface, what testing method is most often used:

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

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

12. The ultrasonic test method in which finger damping in most effective in locating a discontinuity is:

13. The terms used to describe a technique’s ability to locate flaws are:

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

15. Which of the following waves is able to follow a surface around a curve?

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

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

18. The combined effect of scattering and absorption is called:

19. An alloyed metal contains:

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

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

22. An angle probe uses a wedge to create the angle which is most commonly made of:

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

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

25. Resonance or standing waves are a result of:

26. The Gain of an ultrasonic flaw detector is used to give an assessment of:

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

28. The a large acoustic impedance mismatch at an interface will result in:

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

30. What type of set-up can provide information about both the size of the flaw and distance between the flaw and the transducer?

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