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- Question 1 of 40
1. Question
Attenuation is a difficult quantity to measure accurately, particularly in solid materials, at the test frequencies normally used. The overall result usually observed includes other loss mechanisms which can include:
CorrectIncorrect - Question 2 of 40
2. Question
The vertical linear range of a test instrument may be determined by obtaining ultrasonic responses from
CorrectIncorrect - Question 3 of 40
3. Question
Large grains in a metallic test specimen usually result in:
CorrectIncorrect - Question 4 of 40
4. Question
The total energy losses occurring in all materials is called:
CorrectIncorrect - Question 5 of 40
5. Question
When the incident angle is chosen to be between the first and second critical angles, the ultrasonic wave generated within the part will be:
CorrectIncorrect - Question 6 of 40
6. Question
The angle at which 90 degrees refraction of the shear wave mode occurs is called the:
CorrectIncorrect - Question 7 of 40
7. Question
For aluminum and steel, the longitudinal velocity is approximately ____________ the shear velocity.
CorrectIncorrect - Question 8 of 40
8. Question
In ultrasonic testing, the time duration of the transmitted pulse is referred to as:
CorrectIncorrect - Question 9 of 40
9. Question
The phenomenon by which a wave strikes a boundary and changes the direction of its propagation within the same medium is referred to as:
CorrectIncorrect - Question 10 of 40
10. Question
The change in direction of an ultrasonic beam when it passes from one medium to another whose velocity differs from that of the first medium is called
CorrectIncorrect - Question 11 of 40
11. Question
Which of the following modes of vibration exhibits the shortest wavelength at a given frequency and in a given material?
CorrectIncorrect - Question 12 of 40
12. Question
In general, shear waves are more sensitive to small discontinuities than longitudinal waves for a given frequency and in a given material because:
CorrectIncorrect - Question 13 of 40
13. Question
In general, which of the following modes of vibration would have the greatest penetrating power in a coarse-grained material if the frequency of the waves are the same?
CorrectIncorrect - Question 14 of 40
14. Question
A substance that reduces the surface tension of a liquid is referred to as:
CorrectIncorrect - Question 15 of 40
15. Question
The ultrasonic transducers most commonly used for discontinuity testing utilize:
CorrectIncorrect - Question 16 of 40
16. Question
Mechanical and electrical stability, insolubility in liquids, and resistance to aging are three advantages of transducers made of:
CorrectIncorrect - Question 17 of 40
17. Question
The formula sin θ1/V1 = sin θ2/V2 is referred to as
CorrectIncorrect - Question 18 of 40
18. Question
The formula sin θ1/V1 = sin θ2/V2 is used to determine:
CorrectIncorrect - Question 19 of 40
19. Question
The amount of energy reflected from a discontinuity is dependent on:
CorrectIncorrect - Question 20 of 40
20. Question
Which of the following frequencies would probably result in the greatest ultrasonic attenuation losses?
CorrectIncorrect - Question 21 of 40
21. Question
Properties of shear or transverse waves used for ultrasonic testing include:
CorrectIncorrect - Question 22 of 40
22. Question
One of the most common applications of ultrasonic tests employing shear waves is for the:
CorrectIncorrect - Question 23 of 40
23. Question
Significant errors in ultrasonic thickness measurement can occur if:
CorrectIncorrect - Question 24 of 40
24. Question
An ultrasonic testing instrument that displays pulses representing the magnitude of reflected ultrasound as a function of time or depth of metal is said to contain:
CorrectIncorrect - Question 25 of 40
25. Question
In a liquid medium, the only mode of vibration that can exist is:
CorrectIncorrect - Question 26 of 40
26. Question
. In an ultrasonic instrument, the number of pulses produced by an instrument in a given period of time is known as the:
CorrectIncorrect - Question 27 of 40
27. Question
Most basic pulse echo ultrasonic instruments use:
CorrectIncorrect - Question 28 of 40
28. Question
Thin sheet may be inspected with the ultrasonic wave directed normal to the surface by observing:
CorrectIncorrect - Question 29 of 40
29. Question
A diagram in which the entire circuit stage or sections are shown by geometric figures and the path of the signal or energy by lines and/or arrows is called a:
CorrectIncorrect - Question 30 of 40
30. Question
A hole produced during the solidification of metal due to escaping gases is called:
CorrectIncorrect - Question 31 of 40
31. Question
A discontinuity that occurs during the casting of molten metal which may be caused by the splashing, surging, interrupted pouring, or the meeting of two streams of metal coming from different directions is called:
CorrectIncorrect - Question 32 of 40
32. Question
The ratio between the wave speed in one material and the wave speed in a second material is called:
CorrectIncorrect - Question 33 of 40
33. Question
The expansion and contraction of a magnetic material under the influence of a changing magnetic field is referred to as:
CorrectIncorrect - Question 34 of 40
34. Question
A quartz crystal cut so that its major faces are parallel to the Z and Y axes and perpendicular to the X axis is called:
CorrectIncorrect - Question 35 of 40
35. Question
The equation describing wavelength in terms of velocity and frequency is:
CorrectIncorrect - Question 36 of 40
36. Question
Of the piezoelectric materials listed below, the most efficient sound transmitter is:
CorrectIncorrect - Question 37 of 40
37. Question
Of the piezoelectric materials listed below, the most efficient sound receiver is:
CorrectIncorrect - Question 38 of 40
38. Question
Beam divergence is a function of the dimensions of the crystal and the wavelength of the beam transmitted through a medium, and it:
CorrectIncorrect - Question 39 of 40
39. Question
The wavelength of an ultrasonic wave is:
CorrectIncorrect - Question 40 of 40
40. Question
The fundamental frequency of a piezoelectric crystal is primarily a function of:
CorrectIncorrect