ASNT Level 1 UT Exam with Correct Answers
1. 1. The indication on the instrument display that rep- the back-surface reflec-
resents the far boundary of material being tested is tion.
called:
2. 2. In immersion testing, the position of the transducer angulation.
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:
3. 3. The technical name for the cable that connects the coaxial cable
ultrasonic instrument to the transducer is:
4. 4. The process of standardizing an instrument or de- calibration.
vice by using a reference standard is called:
5. 5. Another name for a compressional wave is: longitudinal wave.
6. 6. Another name for rayleigh waves is : surface waves.
7. 7. A material used between the face of a transducer a couplant.
and the test surface to permit or improve the trans-
mission of ultrasonic vibrations from the transducer
to the material being tested is called:
8. 8. The piezoelectric material in a transducer that vi- crystal.
brates to produce ultrasonic waves is called a
9. 9. Ultrasonic testing of material where the probe is in straight beam testing.
direct contact with the material being tested may be:
10. 10. An advantage of using lithium sulfate in transduc- is one of the most eflcient
ers is that it: receivers of ultrasonic en-
ergy
, ASNT Level 1 UT Exam with Correct Answers
11. 12. The transducer that contains the thinnest piezo- 25 MHz transducer
electric crystal is a:
12. 13. Penetration of ultrasonic waves in a material is 1 MHz
normally the function of test frequency used. The
greatest depth of penetration is provided by a fre-
quency of
13. 14. The amount of beam divergence from a crystal is frequency and crystal size.
primarily dependent on the
14. 15. When an ultrasonic beam passes through the in- refraction.
terface between two dissimilar materials at an angle,
a new angle of sound travel takes place in the second
material due to:
15. 21. The velocity of longitudinal waves is approximate- two times
ly the velocity of shear waves in the same
material.
16. 27. Under most circumstances, which of the following 25 MHz
frequencies would result in the best resolving power?
17. 28. Which of the following materials of the same al- A coarse-grained casting.
loy is most like ly to produce the greatest amount of
sound attenuation over a given distance?
18. 29. In contact testing, the entry surface indication is initial pulse.
sometimes referred to as the:
19. 30. An ultrasonic instrument display pattern contain- coarse-grained material.
ing a large number of low-level indications (often re-
ferred to as grass or hash) could be caused by:
, ASNT Level 1 UT Exam with Correct Answers
20. 31. A test method employing two separate transduc- through-transmission
ers on opposite surfaces of the material being tested testing
is called
21. 32. The number of complete waves that pass a given frequency
point in a given period of time (usually 1 s) is referred
to as the
22. 33. The boundary between two different materials an interface.
that are in contact with each other is called:
23. 34. When the motion of the particles of a medium is longitudinal wave.
transverse to the direction of propagation, the wave
being transmitted is called a:
24. 36. The "25 milion eycles per second" can be stated 25 MHz.
number as:
25. 37. Moving a transducer over a test surface either scanning.
manually or automatically is referred to as:
26. 38. A term sound waves pass through various sub- velocity
stances is: used in ultrasonics to express the rate at
which
27. 39. When an indication has reached the maximum vertical limit.
signal height which can be displayed or viewed on the
display of an ultrasonic instrument, the indication is
said to have reached its:
28. 40. An ultrasonic testing technique in which the trans- angle beam testing.
ducer element is not parallel to the test surface is
called:
1. 1. The indication on the instrument display that rep- the back-surface reflec-
resents the far boundary of material being tested is tion.
called:
2. 2. In immersion testing, the position of the transducer angulation.
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:
3. 3. The technical name for the cable that connects the coaxial cable
ultrasonic instrument to the transducer is:
4. 4. The process of standardizing an instrument or de- calibration.
vice by using a reference standard is called:
5. 5. Another name for a compressional wave is: longitudinal wave.
6. 6. Another name for rayleigh waves is : surface waves.
7. 7. A material used between the face of a transducer a couplant.
and the test surface to permit or improve the trans-
mission of ultrasonic vibrations from the transducer
to the material being tested is called:
8. 8. The piezoelectric material in a transducer that vi- crystal.
brates to produce ultrasonic waves is called a
9. 9. Ultrasonic testing of material where the probe is in straight beam testing.
direct contact with the material being tested may be:
10. 10. An advantage of using lithium sulfate in transduc- is one of the most eflcient
ers is that it: receivers of ultrasonic en-
ergy
, ASNT Level 1 UT Exam with Correct Answers
11. 12. The transducer that contains the thinnest piezo- 25 MHz transducer
electric crystal is a:
12. 13. Penetration of ultrasonic waves in a material is 1 MHz
normally the function of test frequency used. The
greatest depth of penetration is provided by a fre-
quency of
13. 14. The amount of beam divergence from a crystal is frequency and crystal size.
primarily dependent on the
14. 15. When an ultrasonic beam passes through the in- refraction.
terface between two dissimilar materials at an angle,
a new angle of sound travel takes place in the second
material due to:
15. 21. The velocity of longitudinal waves is approximate- two times
ly the velocity of shear waves in the same
material.
16. 27. Under most circumstances, which of the following 25 MHz
frequencies would result in the best resolving power?
17. 28. Which of the following materials of the same al- A coarse-grained casting.
loy is most like ly to produce the greatest amount of
sound attenuation over a given distance?
18. 29. In contact testing, the entry surface indication is initial pulse.
sometimes referred to as the:
19. 30. An ultrasonic instrument display pattern contain- coarse-grained material.
ing a large number of low-level indications (often re-
ferred to as grass or hash) could be caused by:
, ASNT Level 1 UT Exam with Correct Answers
20. 31. A test method employing two separate transduc- through-transmission
ers on opposite surfaces of the material being tested testing
is called
21. 32. The number of complete waves that pass a given frequency
point in a given period of time (usually 1 s) is referred
to as the
22. 33. The boundary between two different materials an interface.
that are in contact with each other is called:
23. 34. When the motion of the particles of a medium is longitudinal wave.
transverse to the direction of propagation, the wave
being transmitted is called a:
24. 36. The "25 milion eycles per second" can be stated 25 MHz.
number as:
25. 37. Moving a transducer over a test surface either scanning.
manually or automatically is referred to as:
26. 38. A term sound waves pass through various sub- velocity
stances is: used in ultrasonics to express the rate at
which
27. 39. When an indication has reached the maximum vertical limit.
signal height which can be displayed or viewed on the
display of an ultrasonic instrument, the indication is
said to have reached its:
28. 40. An ultrasonic testing technique in which the trans- angle beam testing.
ducer element is not parallel to the test surface is
called:
