Trial Examination: UT-Level I
Paper 1: 40 Questions
1. Shear waves do not propagate in:
a. Solids
b. Gases
c. Liquids
d. Both B and C are correct
b. Gases
c. Liquids
d. Both B and C are correct
2. Which of the following waves is only able to travel through a thin section of material?
a. A longitudinal wave
b. A shear waves
c. A surface wave
d. A lamb wave
b. A shear waves
c. A surface wave
d. A lamb wave
3. Artificial flaws can be produced by using:
a. Side drilled holes
b. Flat bottom holes
c. Edge notches
d. All of the above
4. The ability to locate discontinuities that are close together within the material is called:
a. Resolution
b. Sensitivity
c. Effectiveness
d. Phase delay
b. Sensitivity
c. Effectiveness
d. Phase delay
5. What is the material called that is used to improve the transmission of ultrasonic sound energy from the transducer into the part?
a. Gel
b. Goo
c. Couplant
b. Goo
c. Couplant
d. Contact paste
6. The ability to locate a small discontinuity is called:
a. Resolution
b. Sensitivity
c. Wavelength
d. Frequency
7. When a wave encounters an interface at an oblique angle, what takes place at the interface due to the different sound velocities of the two materials?
a. Attenuation
b. Refraction
c. Beam spread
d. Beam impedance
8. The combined effect of scattering and absorption is called:
a. Shear factor
b. Propagation
c. Attenuation
d. Impedance
b. Propagation
c. Attenuation
d. Impedance
9. The sound energy or ultrasonic beam is more uniform in the:
a. Far field zone
b. Near field zone
c. Interface between the transducer and plastic wedge
d. Band along the central axis
10. The measure of how a signal from a defect compared to other background reflections is called:
a. Acoustic impedance
b. Signal to noise ratio
c. Refraction
d. Reflection
b. Signal to noise ratio
c. Refraction
d. Reflection
11. Some transducers are specifically fabricated to be:
a. Better transmitters’
b. Better receivers’
c. Used in high temperature applications
d. All of the above
b. Better receivers’
c. Used in high temperature applications
d. All of the above
12. The active element of most acoustic transducers used today is:
b. Lithium
b. Piezoelectric ceramic
c. Sulfide
d. Quartz
b. Piezoelectric ceramic
c. Sulfide
d. Quartz
13. The area in front of a transducer where there are extensive fluctuations in the sound field is called the:
a. Far field zone
b. Surface field zone
c. Near field zone
d. Phase shift zone
b. Surface field zone
c. Near field zone
d. Phase shift zone
14. In the transverse or shear wave, the particles:
a. Move in an elliptical pattern
b. Oscillate at a right angle to the direction of wave propagation
c. Oscillate parallel to the direction of wave propagation
d. Do not actually move
15. Within a given material, the speed of sound:
a. Is constant
b. Decreases with distance from the transducer
c. Increases with distance from the transducer
d. None of the above
b. Decreases with distance from the transducer
c. Increases with distance from the transducer
d. None of the above
16. When an ultrasound wave passes through an interface between two materials at an oblique angle, and the materials have different indices of refraction, it produces:
a. Reflected waves
b. Refracted waves
c. Interface waves
d. Both A and B
b. Refracted waves
c. Interface waves
d. Both A and B
17. Acoustic impedance is identified by the letter:
a. Z
b. I
c. V
d. P
18. In order to have a reasonable chance at detecting a discontinuity, the reflective surface of the discontinuity must have a dimension that is at least as long as ________ wavelength.
a. One-half
b. One
c. Two
d. One-quarter
b. One
c. Two
d. One-quarter
19. Couplant displaces the__________ and makes it possible to get more sound energy into the test specimen.
a. Surface rust
b. Surface blemishes
c. Sound energy
d. Air
b. Surface blemishes
c. Sound energy
d. Air
20. Beam spread is greater when using:
a. High frequency transducers
b. Low frequency transducers
c. Angle beam transducers
d. Larger diameter transducers
b. Low frequency transducers
c. Angle beam transducers
d. Larger diameter transducers
21. Which type of screen presentation displays a profile or cross-sectional view of the test specimen?
a. A-scan
b. B-scan
c. C-scan
d. All of the above
b. B-scan
c. C-scan
d. All of the above
22. Which type of screen presentation displays a plan-type view of the location and size of the test specimen features?
a. A-scan
b. B-scan
c. C-scan
d. All of the above
b. B-scan
c. C-scan
d. All of the above
23. Resolution generally increases:
a. With increased depth of a defect
b. With a decrease in the transducer frequency
c. When the transducer diameter is reduced
d. With an increase in transducer frequency
b. With a decrease in the transducer frequency
c. When the transducer diameter is reduced
d. With an increase in transducer frequency
24. The material of the reference standard used to setup for a flaw inspection:
a. Can be made from any material as long as the velocity is the same
b. Should be the same material being inspected
c. Must have the same impedance values as the base material
d. Can only be used once
b. Should be the same material being inspected
c. Must have the same impedance values as the base material
d. Can only be used once
25. When a longitudinal wave encounters an interface between two material with different acoustic impedances, what occurs when the angle of incidence is 90 degrees?
a. Reflection
b. Refraction
c. Mode conversion
d. Reflection and refraction
b. Refraction
c. Mode conversion
d. Reflection and refraction
26. Which of the following would make a good couplant?
a. Water
b. Oil
c. Glycerin
d. All of the above
b. Oil
c. Glycerin
d. All of the above
27. The act of evaluating and adjusting the precision and accuracy of the measurement equipment is called:
a. Standardization
b. Calibration
c. Accuracy
d. Tuning
b. Calibration
c. Accuracy
d. Tuning
28. As frequency increases, sound tends to:
a. Become more compressed
b. Scatter more from large or course grain structure
c. Convert to a different wave mode
d. Become more penetrating
b. Scatter more from large or course grain structure
c. Convert to a different wave mode
d. Become more penetrating
29. The first critical angle describes the condition where the:
a. The angle of the refracted longitudinal wave is less than 90o
b. The angle of the refracted longitudinal wave is exactly 90o
c. The angle of the refracted longitudinal wave is greater than 90o
d. The angle of the refracted shear wave is exactly 90o
30. The number of cycles per second is the definition of:
a. Wave speed
b. Frequency
c. Hertz
d. None of the above
b. Frequency
c. Hertz
d. None of the above
31. Contact transducers are used for direct contact inspections, and are generally:
a. Used with an immersion tank
b. Used with an automated system
c. Used on complicated shaped parts
d. Hand manipulated
b. Used with an automated system
c. Used on complicated shaped parts
d. Hand manipulated
32. Which type of screen presentation displays the amount of received ultrasonic energy as a function of time?
a. A-scan
b. B-scan
c. C-scan
d. All of the above
b. B-scan
c. C-scan
d. All of the above
33. When performing a contact inspection on a curved surface, what pieced of equipment can be used to improve coupling?
a. A spherically focused transducer
b. A cylindrically focused transducer
c. A shaped shoe
d. A large diameter transducer
b. A cylindrically focused transducer
c. A shaped shoe
d. A large diameter transducer
34. What type of transducer contains two independently operating elements in a single housing?
a. Crystal mosaic transducer
b. Dual/Twin element transducer
c. Liquid crystal transducer
d. Bi polar transducer
b. Dual/Twin element transducer
c. Liquid crystal transducer
d. Bi polar transducer
35. When a single element transducer is operating in the pulse echo mode, the element:
a. Can not start receiving reflected signals until the element has stopped ringing from its transmit function
b. Needs to have a high pulse rate
c. Should be used in the dual mode
d. Can only be made with lithium sulfate
36. The terms used to describe a technique’s ability to locate flaws are:
a. Sensitivity and penetration
b. Space and time
c. Sensitivity and resolution
d. Frequency and size
b. Space and time
c. Sensitivity and resolution
d. Frequency and size
37. Longitudinal waves are also called:
a. Surface waves
b. Lamb waves
c. Compressional waves
d. Both B and C are correct
b. Lamb waves
c. Compressional waves
d. Both B and C are correct
38. Which of the following waves is able to follow a surface around a curve?
a. A longitudinal wave
b. A shear wave
c. A surface wave
d. A Lamb wave
b. A shear wave
c. A surface wave
d. A Lamb wave
39. Surface or Rayleigh waves traveling along the surface of relative thick solid material, penetrate to a depth of approximately:
a. One wavelength
b. One-half wavelengths
b. One-half wavelengths
c. Two wavelengths
d. Infinite wavelengths
d. Infinite wavelengths
40. What is used to support the active element and dampen the transducers characteristics?
a. Resin
b. Oil
c. Backing material with a similar the impedance of the transducer
d. Any of the above will work
b. Oil
c. Backing material with a similar the impedance of the transducer
d. Any of the above will work
ANSWER TO TRIAL EXAM 40 QUESTIONS:
1.D | 2.D | 3.D | 4.A | 5.C |
6.B | 7.B | 8.C | 9.A | 10.B |
11.D | 12.B | 13.C | 14.B | 15.A |
16.D | 17.A | 18.A | 19.D | 20.B |
21.B | 22.C | 23.D | 24.B | 25.A |
26.D | 27.B | 28.B | 29.B | 30.B |
31.D | 32.A | 33.C | 34.B | 35.A |
36.C | 37.C | 38.C | 39.A | 40.C |
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