ASNT ULTRASONIC LEVEL I EXAM 2025/2026 BANK
COMPLETE 200 QUESTIONS WITH DETAILED
VERIFIED ANSWERS (100% CORRECT ANSWERS) A+
GRADE ASSURED
When an ultrasonic beam reaches the interface of two dissimilar materials it is:
A. Reflected
B. Refracted
C. Mode converted
D. All of the above
D. All of the above
The wave mode that has multiple or varying wave velocities is:
A. Longitudinal waves
B. Shear waves
C. Transverse waves
D. Lamb waves
D. Lamb Waves
Which of the following would be considered application(s) of ultrasonic
techniques
A. Determination of a material's elastic modules
B. Study of a material's metallurgical structure
C. Measurement of a material's thickness
D. All if the above
D. All of the above
The only significant sound wave mode that travels through a liquid is
A. Shear Wave
B. Longitudinal Wave
C. Surface Wave
D. Rayleigh Wave
B. Longitudinal Wave
The acoustic impedance of a material is used to determine the
A. Angle of refraction at an interface
B. Attenuation within the material
C. Relative amounts of sound energy coupled through and reflected at the
interface
D. Beam spread within the material
C. Relative amounts of sound energy coupled through and reflected at the interface
When angle beam contact testing a test piece, increasing the incident angle until
the second critical angle is reached results in
A. Total reflection of a surface wave
B. 45 degree refraction of the shear waves
,C. Production of a surface wave
D. None of the above
C. Production of a surface wave
Acoustic energy propagates in different modes. Which of the following
represents a mode?
A. Longitudinal Wave
B. Shear Wave
C. Surface Wave
D. All of the above
D. All of the above
The simple experiment where a stick in a glass of water appears disjointed at the
water surface illustrates the phenomenon of
A. Reflection
B. Magnification
C. Refraction
D. Diffraction
C. Refraction
The crystal thickness and transducer frequency are related. The thinner the
crystal
A. Lower the frequency
B. The high the frequency
C. There is no appreciable affect
D. None of the above
B. The high the frequency
The random distribution of crystallographic direction in alloys with large
crystalline structures in a factor in determining
A. Acoustic noise levels
B. Selection of test frequency
C. Scattering of sound
D. All of the above
D. All of the above
The length of the zone adjacent to a transducer in which functions in sound
pressure occur is mostly affected by
A. The frequency of the transducer
B. The Diameter of the transducer
C. The length of the transducer cable
D. A and B
D. A and B
The differences in signals received from identical reflectors at different material
distances from a transducer may be caused by
A. Material attenuation
B. Beam Divergence
C. Near field effects
D. All of the above
D. All of the above
,It is possible for a discontinuity smaller than the transducer to produce
indications of functioning amplitude as the transducer is moved laterally if testing
is being performed in the
A. Fraunhofer zone
B. Near Field
C. Snell Field
D. Shadow Zone
B. Near Field
In Immersion testing the near field effects of a transducer may be eliminated by
A. Increasing transducer frequency
B. Using the larger diameter transducer
C. Using an appropriate water path
D. Using a focused transducer
C. Using an appropriate water path
In figures 1, assuming a uniform beam pattern, what relationship would you
expect to exist between the amplitudes of the reflected laminar signals at position
A and B
A. 12 dB difference
B. Equal amplitude
C. 2 to 1
D. 3 to 1
C. 2 to 1
In the fare field of a uniform ultrasonic beam, sound intensity is ________ the
beam centerline
A. Minimum at
B. Maximum at
C. Maximum throughout twice the angle (sin Y=c/df)
D. Not related to orientation of
B. Maximum at
Which of the following may result in a long narrow rod if the beam divergence
results in a reflection from a side of the test piece before the sound wave reaches
the back surface
A. Multiple indications before the first back reflection
B. Indications from multiple surface reflections
C. Conversion from the longitudinal mode to shear mode
D. Loss of front surface indications
C. Conversions from the longitudinal mode to shear mode
Where does beam divergence occur?
a. near field
b. far field
c. at the crystal
d. none of the above
b. far field
As frequency increases in ultrasonic testing, the angle of beam divergence of a
given diameter crystal
, A. decreases
B. remains unchanged
C. increases
D. none of the above
A. decreases
As the radius of curvature of a curved lens is increased, the focal length of the
lens will:
A. Increase
B. Decrease
C. Remain the same
D. Cannot be determined unless the frequency is known
A. Increases
When examining materials for planar flaws oriented parallel to the part surface,
what testing the method is most often used
A. angle beam
b. through- transmission
c. straight beam
d. dual crystal
c. straight beam
If a contact angle beam transducer produces a 45 degrees shear waves is steel,
the angle produced by the same transducer in an aluminum specimen would be
A. less than 45 degrees
B. greater than 45 degrees
C. 45 degrees
D. unknown more information is required
A. less than 45 degrees
Rayleigh waves are influenced by most by defects located
A. close to or on the surface
b. 1 wavelength below the surface
c. 3 wavelength below the surface
d. 6 wavelength below the surface
A. close to or on the surface
The ultrasonic testing technique in which finger damping is most effective in
locating a discontinuity is the
a. shear wave technique
b. longitudinal wave technique
c. surface wave technique
d. compressional wave technique
c. surface wave technique
Lamb waves can be used to detect:
a. Laminar type defects near the surface of a thin material
b. Lack of fusion in the center of a thick weldment
c. Internal voids in diffusion bonds
d. Thickness changes in heavy plate material
A. laminar type defects near the surface of a think material
COMPLETE 200 QUESTIONS WITH DETAILED
VERIFIED ANSWERS (100% CORRECT ANSWERS) A+
GRADE ASSURED
When an ultrasonic beam reaches the interface of two dissimilar materials it is:
A. Reflected
B. Refracted
C. Mode converted
D. All of the above
D. All of the above
The wave mode that has multiple or varying wave velocities is:
A. Longitudinal waves
B. Shear waves
C. Transverse waves
D. Lamb waves
D. Lamb Waves
Which of the following would be considered application(s) of ultrasonic
techniques
A. Determination of a material's elastic modules
B. Study of a material's metallurgical structure
C. Measurement of a material's thickness
D. All if the above
D. All of the above
The only significant sound wave mode that travels through a liquid is
A. Shear Wave
B. Longitudinal Wave
C. Surface Wave
D. Rayleigh Wave
B. Longitudinal Wave
The acoustic impedance of a material is used to determine the
A. Angle of refraction at an interface
B. Attenuation within the material
C. Relative amounts of sound energy coupled through and reflected at the
interface
D. Beam spread within the material
C. Relative amounts of sound energy coupled through and reflected at the interface
When angle beam contact testing a test piece, increasing the incident angle until
the second critical angle is reached results in
A. Total reflection of a surface wave
B. 45 degree refraction of the shear waves
,C. Production of a surface wave
D. None of the above
C. Production of a surface wave
Acoustic energy propagates in different modes. Which of the following
represents a mode?
A. Longitudinal Wave
B. Shear Wave
C. Surface Wave
D. All of the above
D. All of the above
The simple experiment where a stick in a glass of water appears disjointed at the
water surface illustrates the phenomenon of
A. Reflection
B. Magnification
C. Refraction
D. Diffraction
C. Refraction
The crystal thickness and transducer frequency are related. The thinner the
crystal
A. Lower the frequency
B. The high the frequency
C. There is no appreciable affect
D. None of the above
B. The high the frequency
The random distribution of crystallographic direction in alloys with large
crystalline structures in a factor in determining
A. Acoustic noise levels
B. Selection of test frequency
C. Scattering of sound
D. All of the above
D. All of the above
The length of the zone adjacent to a transducer in which functions in sound
pressure occur is mostly affected by
A. The frequency of the transducer
B. The Diameter of the transducer
C. The length of the transducer cable
D. A and B
D. A and B
The differences in signals received from identical reflectors at different material
distances from a transducer may be caused by
A. Material attenuation
B. Beam Divergence
C. Near field effects
D. All of the above
D. All of the above
,It is possible for a discontinuity smaller than the transducer to produce
indications of functioning amplitude as the transducer is moved laterally if testing
is being performed in the
A. Fraunhofer zone
B. Near Field
C. Snell Field
D. Shadow Zone
B. Near Field
In Immersion testing the near field effects of a transducer may be eliminated by
A. Increasing transducer frequency
B. Using the larger diameter transducer
C. Using an appropriate water path
D. Using a focused transducer
C. Using an appropriate water path
In figures 1, assuming a uniform beam pattern, what relationship would you
expect to exist between the amplitudes of the reflected laminar signals at position
A and B
A. 12 dB difference
B. Equal amplitude
C. 2 to 1
D. 3 to 1
C. 2 to 1
In the fare field of a uniform ultrasonic beam, sound intensity is ________ the
beam centerline
A. Minimum at
B. Maximum at
C. Maximum throughout twice the angle (sin Y=c/df)
D. Not related to orientation of
B. Maximum at
Which of the following may result in a long narrow rod if the beam divergence
results in a reflection from a side of the test piece before the sound wave reaches
the back surface
A. Multiple indications before the first back reflection
B. Indications from multiple surface reflections
C. Conversion from the longitudinal mode to shear mode
D. Loss of front surface indications
C. Conversions from the longitudinal mode to shear mode
Where does beam divergence occur?
a. near field
b. far field
c. at the crystal
d. none of the above
b. far field
As frequency increases in ultrasonic testing, the angle of beam divergence of a
given diameter crystal
, A. decreases
B. remains unchanged
C. increases
D. none of the above
A. decreases
As the radius of curvature of a curved lens is increased, the focal length of the
lens will:
A. Increase
B. Decrease
C. Remain the same
D. Cannot be determined unless the frequency is known
A. Increases
When examining materials for planar flaws oriented parallel to the part surface,
what testing the method is most often used
A. angle beam
b. through- transmission
c. straight beam
d. dual crystal
c. straight beam
If a contact angle beam transducer produces a 45 degrees shear waves is steel,
the angle produced by the same transducer in an aluminum specimen would be
A. less than 45 degrees
B. greater than 45 degrees
C. 45 degrees
D. unknown more information is required
A. less than 45 degrees
Rayleigh waves are influenced by most by defects located
A. close to or on the surface
b. 1 wavelength below the surface
c. 3 wavelength below the surface
d. 6 wavelength below the surface
A. close to or on the surface
The ultrasonic testing technique in which finger damping is most effective in
locating a discontinuity is the
a. shear wave technique
b. longitudinal wave technique
c. surface wave technique
d. compressional wave technique
c. surface wave technique
Lamb waves can be used to detect:
a. Laminar type defects near the surface of a thin material
b. Lack of fusion in the center of a thick weldment
c. Internal voids in diffusion bonds
d. Thickness changes in heavy plate material
A. laminar type defects near the surface of a think material
