ASNT ULTRASONIC LEVEL I EXAM LATEST 2025 WITH CORRECT
QUESTIONS AND DETAILED ANSWERS/ALREADY GRADED A+
Compressional wave - CORRECT ANSWER-Another name for a longitudinal
wave.
Rayleigh wave - CORRECT ANSWER-Another name for surface waves.
Couplant - CORRECT 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 - CORRECT ANSWER-The material in a transducer that
vibrates to produce ultrasonic waves.
Ultrasonic testing - CORRECT ANSWER-Testing of material where the transducer
is in direct contact with the material being tested.
Lithium sulfate - CORRECT ANSWER-An advantage of using lithium sulfate in
transducers is that it is one of the most efficient generators of ultrasonic energy.
,Transducer frequency - CORRECT ANSWER-The transducer that contains the
thinnest piezoelectric crystal is a 25 MHz transducer.
Far boundary indication - CORRECT ANSWER-The indication on the instrument
display that represents the far boundary of the material being tested.
Immersion testing - CORRECT 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 - CORRECT ANSWER-The cable that connects the ultrasonic
instrument to the transducer is specially designed so that one conductor is
centered inside another.
Calibration - CORRECT ANSWER-The process of comparing an instrument or
device with a standard.
Beam divergence - CORRECT ANSWER-The amount of beam divergence from a
crystal is primarily dependent on the frequency and crystal size.
Refraction - CORRECT 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 - CORRECT ANSWER-Represents the initial pulse or front surface
indication in Figure 2.
, Indication B - CORRECT ANSWER-Represents the first discontinuity indication in
Figure 2.
Indication C - CORRECT ANSWER-Represents the second back surface reflection
in Figure 2.
Indication D - CORRECT ANSWER-Represents the second indication of the
discontinuity in Figure 2.
Indication E - CORRECT ANSWER-Represents the second back surface reflection
in Figure 2.
Velocity of surface waves - CORRECT ANSWER-Approximately _________ the
velocity of shear waves in the same material.
Indication A - CORRECT ANSWER-The first front surface indication.
Indication B - CORRECT ANSWER-First back surface reflection.
Indication C - CORRECT ANSWER-First discontinuity reflection.
Indication D - CORRECT ANSWER-Second discontinuity indication.
QUESTIONS AND DETAILED ANSWERS/ALREADY GRADED A+
Compressional wave - CORRECT ANSWER-Another name for a longitudinal
wave.
Rayleigh wave - CORRECT ANSWER-Another name for surface waves.
Couplant - CORRECT 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 - CORRECT ANSWER-The material in a transducer that
vibrates to produce ultrasonic waves.
Ultrasonic testing - CORRECT ANSWER-Testing of material where the transducer
is in direct contact with the material being tested.
Lithium sulfate - CORRECT ANSWER-An advantage of using lithium sulfate in
transducers is that it is one of the most efficient generators of ultrasonic energy.
,Transducer frequency - CORRECT ANSWER-The transducer that contains the
thinnest piezoelectric crystal is a 25 MHz transducer.
Far boundary indication - CORRECT ANSWER-The indication on the instrument
display that represents the far boundary of the material being tested.
Immersion testing - CORRECT 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 - CORRECT ANSWER-The cable that connects the ultrasonic
instrument to the transducer is specially designed so that one conductor is
centered inside another.
Calibration - CORRECT ANSWER-The process of comparing an instrument or
device with a standard.
Beam divergence - CORRECT ANSWER-The amount of beam divergence from a
crystal is primarily dependent on the frequency and crystal size.
Refraction - CORRECT 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 - CORRECT ANSWER-Represents the initial pulse or front surface
indication in Figure 2.
, Indication B - CORRECT ANSWER-Represents the first discontinuity indication in
Figure 2.
Indication C - CORRECT ANSWER-Represents the second back surface reflection
in Figure 2.
Indication D - CORRECT ANSWER-Represents the second indication of the
discontinuity in Figure 2.
Indication E - CORRECT ANSWER-Represents the second back surface reflection
in Figure 2.
Velocity of surface waves - CORRECT ANSWER-Approximately _________ the
velocity of shear waves in the same material.
Indication A - CORRECT ANSWER-The first front surface indication.
Indication B - CORRECT ANSWER-First back surface reflection.
Indication C - CORRECT ANSWER-First discontinuity reflection.
Indication D - CORRECT ANSWER-Second discontinuity indication.
