Ultrasonic ASNT Level I Exam Questions
2025/2026 Exam All Answers and
Illustrations Given
Far boundary indication - 🧠 ANSWER ✔✔The indication on the instrument
display that represents the far boundary of the material being tested.
Immersion testing - 🧠 ANSWER ✔✔The position of the transducer is often varied
to transmit sound into the test part at various angles to the front surface.
Coaxial cable - 🧠 ANSWER ✔✔The cable that connects the ultrasonic instrument
to the transducer is specially designed so that one conductor is centered inside
another.
Calibration - 🧠 ANSWER ✔✔The process of comparing an instrument or device
with a standard.
Compressional wave - 🧠 ANSWER ✔✔Another name for a longitudinal wave.
Rayleigh wave - 🧠 ANSWER ✔✔Another name for surface waves.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435.
TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 1
,Couplant - 🧠 ANSWER ✔✔A material used between the face of a transducer and
the test surface to permit or improve the transmission of ultrasonic vibrations.
Piezoelectric material - 🧠 ANSWER ✔✔The material in a transducer that vibrates
to produce ultrasonic waves.
Ultrasonic testing - 🧠 ANSWER ✔✔Testing of material where the transducer is in
direct contact with the material being tested.
Lithium sulfate - 🧠 ANSWER ✔✔An advantage of using lithium sulfate in
transducers is that it is one of the most efficient generators of ultrasonic energy.
Transducer frequency - 🧠 ANSWER ✔✔The transducer that contains the thinnest
piezoelectric crystal is a 25 MHz transducer.
Beam divergence - 🧠 ANSWER ✔✔The amount of beam divergence from a crystal
is primarily dependent on the frequency and crystal size.
Refraction - 🧠 ANSWER ✔✔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.
Indication A - 🧠 ANSWER ✔✔Represents the initial pulse or front surface
indication in Figure 2.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435.
TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 2
, Indication B - 🧠 ANSWER ✔✔Represents the first discontinuity indication in
Figure 2.
Indication C - 🧠 ANSWER ✔✔Represents the second back surface reflection in
Figure 2.
Indication D - 🧠 ANSWER ✔✔Represents the second indication of the
discontinuity in Figure 2.
Indication E - 🧠 ANSWER ✔✔Represents the second back surface reflection in
Figure 2.
Velocity of surface waves - 🧠 ANSWER ✔✔Approximately _________ the
velocity of shear waves in the same material.
Indication A - 🧠 ANSWER ✔✔The first front surface indication.
Indication B - 🧠 ANSWER ✔✔First back surface reflection.
Indication C - 🧠 ANSWER ✔✔First discontinuity reflection.
Indication D - 🧠 ANSWER ✔✔Second discontinuity indication.
Distance between indications A and B - 🧠 ANSWER ✔✔The distance from the
front surface of the aluminum block to the discontinuity.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435.
TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 3
2025/2026 Exam All Answers and
Illustrations Given
Far boundary indication - 🧠 ANSWER ✔✔The indication on the instrument
display that represents the far boundary of the material being tested.
Immersion testing - 🧠 ANSWER ✔✔The position of the transducer is often varied
to transmit sound into the test part at various angles to the front surface.
Coaxial cable - 🧠 ANSWER ✔✔The cable that connects the ultrasonic instrument
to the transducer is specially designed so that one conductor is centered inside
another.
Calibration - 🧠 ANSWER ✔✔The process of comparing an instrument or device
with a standard.
Compressional wave - 🧠 ANSWER ✔✔Another name for a longitudinal wave.
Rayleigh wave - 🧠 ANSWER ✔✔Another name for surface waves.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435.
TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 1
,Couplant - 🧠 ANSWER ✔✔A material used between the face of a transducer and
the test surface to permit or improve the transmission of ultrasonic vibrations.
Piezoelectric material - 🧠 ANSWER ✔✔The material in a transducer that vibrates
to produce ultrasonic waves.
Ultrasonic testing - 🧠 ANSWER ✔✔Testing of material where the transducer is in
direct contact with the material being tested.
Lithium sulfate - 🧠 ANSWER ✔✔An advantage of using lithium sulfate in
transducers is that it is one of the most efficient generators of ultrasonic energy.
Transducer frequency - 🧠 ANSWER ✔✔The transducer that contains the thinnest
piezoelectric crystal is a 25 MHz transducer.
Beam divergence - 🧠 ANSWER ✔✔The amount of beam divergence from a crystal
is primarily dependent on the frequency and crystal size.
Refraction - 🧠 ANSWER ✔✔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.
Indication A - 🧠 ANSWER ✔✔Represents the initial pulse or front surface
indication in Figure 2.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435.
TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 2
, Indication B - 🧠 ANSWER ✔✔Represents the first discontinuity indication in
Figure 2.
Indication C - 🧠 ANSWER ✔✔Represents the second back surface reflection in
Figure 2.
Indication D - 🧠 ANSWER ✔✔Represents the second indication of the
discontinuity in Figure 2.
Indication E - 🧠 ANSWER ✔✔Represents the second back surface reflection in
Figure 2.
Velocity of surface waves - 🧠 ANSWER ✔✔Approximately _________ the
velocity of shear waves in the same material.
Indication A - 🧠 ANSWER ✔✔The first front surface indication.
Indication B - 🧠 ANSWER ✔✔First back surface reflection.
Indication C - 🧠 ANSWER ✔✔First discontinuity reflection.
Indication D - 🧠 ANSWER ✔✔Second discontinuity indication.
Distance between indications A and B - 🧠 ANSWER ✔✔The distance from the
front surface of the aluminum block to the discontinuity.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435.
TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 3
