ASNT
ASNT Level 1 UT Test Study Material
Questions and Answers 100% Solved 2025
1. The indication on the instrument display that represents the far boundary of material
being tested is called: -Correct Answer ✔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: -Correct Answer ✔angulation.
3. The technical name for the cable that connects the ultrasonic instrument to the
transducer is: -Correct Answer ✔coaxial cable
4. The process of standardizing an instrument or device by using a reference standard
is called: -Correct Answer ✔calibration.
5. Another name for a compressional wave is: -Correct Answer ✔longitudinal wave.
6. Another name for rayleigh waves is : -Correct Answer ✔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: -Correct Answer ✔a couplant.
8. The piezoelectric material in a transducer that vibrates to produce ultrasonic waves is
called a -Correct Answer ✔crystal.
9. Ultrasonic testing of material where the probe is in direct contact with the material
being tested may be: -Correct Answer ✔straight beam testing.
10. An advantage of using lithium sulfate in transducers is that it: -Correct Answer ✔is
one of the most efficient receivers of ultrasonic energy
12. The transducer that contains the thinnest piezoelectric crystal is a: -Correct Answer
✔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 -
Correct Answer ✔1 MHz
14. The amount of beam divergence from a crystal is primarily dependent on the -
Correct Answer ✔frequency and crystal size.
1|Page
, ASNT
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: -Correct Answer ✔refraction.
21. The velocity of longitudinal waves is approximately __________ the velocity of
shear waves in the same material. -Correct Answer ✔two times
27. Under most circumstances, which of the following frequencies would result in the
best resolving power? -Correct Answer ✔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? -Correct Answer ✔A
coarse-grained casting.
29. In contact testing, the entry surface indication is sometimes referred to as the: -
Correct Answer ✔initial pulse.
30. An ultrasonic instrument display pattern containing a large number of low-level
indications (often referred to as grass or hash) could be caused by: -Correct Answer
✔coarse-grained material.
31. A test method employing two separate transducers on opposite surfaces of the
material being tested is called -Correct Answer ✔through-transmission testing
32. The number of complete waves that pass a given point in a given period of time
(usually 1 s) is referred to as the -Correct Answer ✔frequency
33. The boundary between two different materials that are in contact with each other is
called: -Correct Answer ✔an interface.
34. When the motion of the particles of a medium is transverse to the direction of
propagation, the wave being transmitted is called a: -Correct Answer ✔longitudinal
wave.
36. The "25 milion eycles per second" can be stated number as: -Correct Answer ✔25
MHz.
37. Moving a transducer over a test surface either manually or automatically is referred
to as: -Correct Answer ✔scanning.
38. A term sound waves pass through various substances is: used in ultrasonics to
express the rate at which -Correct Answer ✔velocity
2|Page
ASNT Level 1 UT Test Study Material
Questions and Answers 100% Solved 2025
1. The indication on the instrument display that represents the far boundary of material
being tested is called: -Correct Answer ✔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: -Correct Answer ✔angulation.
3. The technical name for the cable that connects the ultrasonic instrument to the
transducer is: -Correct Answer ✔coaxial cable
4. The process of standardizing an instrument or device by using a reference standard
is called: -Correct Answer ✔calibration.
5. Another name for a compressional wave is: -Correct Answer ✔longitudinal wave.
6. Another name for rayleigh waves is : -Correct Answer ✔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: -Correct Answer ✔a couplant.
8. The piezoelectric material in a transducer that vibrates to produce ultrasonic waves is
called a -Correct Answer ✔crystal.
9. Ultrasonic testing of material where the probe is in direct contact with the material
being tested may be: -Correct Answer ✔straight beam testing.
10. An advantage of using lithium sulfate in transducers is that it: -Correct Answer ✔is
one of the most efficient receivers of ultrasonic energy
12. The transducer that contains the thinnest piezoelectric crystal is a: -Correct Answer
✔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 -
Correct Answer ✔1 MHz
14. The amount of beam divergence from a crystal is primarily dependent on the -
Correct Answer ✔frequency and crystal size.
1|Page
, ASNT
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: -Correct Answer ✔refraction.
21. The velocity of longitudinal waves is approximately __________ the velocity of
shear waves in the same material. -Correct Answer ✔two times
27. Under most circumstances, which of the following frequencies would result in the
best resolving power? -Correct Answer ✔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? -Correct Answer ✔A
coarse-grained casting.
29. In contact testing, the entry surface indication is sometimes referred to as the: -
Correct Answer ✔initial pulse.
30. An ultrasonic instrument display pattern containing a large number of low-level
indications (often referred to as grass or hash) could be caused by: -Correct Answer
✔coarse-grained material.
31. A test method employing two separate transducers on opposite surfaces of the
material being tested is called -Correct Answer ✔through-transmission testing
32. The number of complete waves that pass a given point in a given period of time
(usually 1 s) is referred to as the -Correct Answer ✔frequency
33. The boundary between two different materials that are in contact with each other is
called: -Correct Answer ✔an interface.
34. When the motion of the particles of a medium is transverse to the direction of
propagation, the wave being transmitted is called a: -Correct Answer ✔longitudinal
wave.
36. The "25 milion eycles per second" can be stated number as: -Correct Answer ✔25
MHz.
37. Moving a transducer over a test surface either manually or automatically is referred
to as: -Correct Answer ✔scanning.
38. A term sound waves pass through various substances is: used in ultrasonics to
express the rate at which -Correct Answer ✔velocity
2|Page
