ASNT LEVEL 1 UT EXAM 2025
QUESTIONS AND ANSWERS
1. The indication on the instrument display that represents the far boundary of material being
tested is called: - ANS the back-surface reflection.
2. In immersion testing, the position of the transducer is often varied by a manipulator to
transmit sound into the test part at various angles to the front surface. Such a procedure is
referred to as: - ANS angulation.
3. The technical name for the cable that connects the ultrasonic instrument to the transducer
is: - ANS coaxial cable
4. The process of standardizing an instrument or device by using a reference standard is called:
- ANS calibration.
5. Another name for a compressional wave is: - ANS longitudinal wave.
6. Another name for rayleigh waves is : - ANS surface waves.
7. A material used between the face of a transducer and the test surface to permit or improve
the transmission of ultrasonic vibrations from the transducer to the material being tested is
called: - ANS a couplant.
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, 8. The piezoelectric material in a transducer that vibrates to produce ultrasonic waves is called
a - ANS crystal.
9. Ultrasonic testing of material where the probe is in direct contact with the material being
tested may be: - ANS straight beam testing.
10. An advantage of using lithium sulfate in transducers is that it: - ANS is one of the most
efficient receivers of ultrasonic energy
12. The transducer that contains the thinnest piezoelectric crystal is a: - ANS 25 MHz
transducer
13. Penetration of ultrasonic waves in a material is normally the function of test frequency
used. The greatest depth of penetration is provided by a frequency of - ANS 1 MHz
14. The amount of beam divergence from a crystal is primarily dependent on the -
ANS frequency and crystal size.
15. When an ultrasonic beam passes through the interface between two dissimilar materials at
an angle, a new angle of sound travel takes place in the second material due to: -
ANS refraction.
21. The velocity of longitudinal waves is approximately __________ the velocity of shear waves
in the same material. - ANS two times
27. Under most circumstances, which of the following frequencies would result in the best
resolving power? - ANS 25 MHz
28. Which of the following materials of the same alloy is most like ly to produce the greatest
amount of sound attenuation over a given distance? - ANS A coarse-grained casting.
COPYRIGHT © 2025 BRAINBARTER ALL RIGHTS RESERVED 2
QUESTIONS AND ANSWERS
1. The indication on the instrument display that represents the far boundary of material being
tested is called: - ANS the back-surface reflection.
2. In immersion testing, the position of the transducer is often varied by a manipulator to
transmit sound into the test part at various angles to the front surface. Such a procedure is
referred to as: - ANS angulation.
3. The technical name for the cable that connects the ultrasonic instrument to the transducer
is: - ANS coaxial cable
4. The process of standardizing an instrument or device by using a reference standard is called:
- ANS calibration.
5. Another name for a compressional wave is: - ANS longitudinal wave.
6. Another name for rayleigh waves is : - ANS surface waves.
7. A material used between the face of a transducer and the test surface to permit or improve
the transmission of ultrasonic vibrations from the transducer to the material being tested is
called: - ANS a couplant.
COPYRIGHT © 2025 BRAINBARTER ALL RIGHTS RESERVED 1
, 8. The piezoelectric material in a transducer that vibrates to produce ultrasonic waves is called
a - ANS crystal.
9. Ultrasonic testing of material where the probe is in direct contact with the material being
tested may be: - ANS straight beam testing.
10. An advantage of using lithium sulfate in transducers is that it: - ANS is one of the most
efficient receivers of ultrasonic energy
12. The transducer that contains the thinnest piezoelectric crystal is a: - ANS 25 MHz
transducer
13. Penetration of ultrasonic waves in a material is normally the function of test frequency
used. The greatest depth of penetration is provided by a frequency of - ANS 1 MHz
14. The amount of beam divergence from a crystal is primarily dependent on the -
ANS frequency and crystal size.
15. When an ultrasonic beam passes through the interface between two dissimilar materials at
an angle, a new angle of sound travel takes place in the second material due to: -
ANS refraction.
21. The velocity of longitudinal waves is approximately __________ the velocity of shear waves
in the same material. - ANS two times
27. Under most circumstances, which of the following frequencies would result in the best
resolving power? - ANS 25 MHz
28. Which of the following materials of the same alloy is most like ly to produce the greatest
amount of sound attenuation over a given distance? - ANS A coarse-grained casting.
COPYRIGHT © 2025 BRAINBARTER ALL RIGHTS RESERVED 2
