NDT UT LEVEL 2 EXAM QUESTIONS WITH VERIFIED
ANSWERS 2024-2025
Discontinuity location and size (plan view). - ANSWER When a C-scan is
used to produce a permanent record of an ultrasonic test, the
information displayed is typically the:
Loss of echo amplitude from discontinuities and an increase in the width
of the front surface echo. - ANSWER Rough entry surface echo
conditions can result in:
The attenuation - ANSWER As the grain size increases in a material, its
principal effect in ultrasonic testing is on:
Decrease it - ANSWER In straight beam pulse echo testing a
discontinuity with a rough reflecting surface perpendicular to the incident
wave will have what effect on the detected signal in comparison to a
smooth flat-bottom hole of the same size? (Increase, decrease, no
effect, decrease the width of the pulse of it.)
Machine Oil - ANSWER Ultrasonic vibrations can be propagated only in
the longitudinal mode in which of the following media? (Machine oil,
Aluminum, Ice, Beryllium)
The same as the velocity at 1/2 inch - ANSWER If the velocity of a
longitudinal mode wave in a given homogeneous material is .625
cm/micro second at 1/2 inch below the surface, what is the velocity at 2
inches below the surface? (1/4 the velocity at 1/2 inch, 1/2 the velocity at
1/2 inch, the same, none of the above)
The wavelength would be shorter - ANSWER If a 5.0 MHz transducer is
substituted for a 2.25 MHz transducer (5.0 old, 2.25 new), what would be
the effect on the wavelength of a longitudinal mode wave in the test
specimen.
, All of the above - ANSWER What can cause irrelevant indications on the
display screen? (Contoured surfaces, edge effects, surface conditions,
All of the above)
Reference Standard - ANSWER A common method for the estimation of
defect size is the use of a:
Near Field - ANSWER Another name for Fresnel Zone is:
Test material parameter - ANSWER Attenuation is a: (Test display
characteristic, Test material parameter, Transducer characteristic, Form
of testing)
Decreased - ANSWER For discontinuity geometries other than flat, the
echo amplitude is usually ______ from that observed for a flat defect, of
similar orientation perpendicular to the sound beams. (identical,
increased, decreased, elongated)
Angulate the search unit - ANSWER What must be done to evaluate
discontinuities that are oriented at an angle to the entry surface so that
the sound beam will strike the plane of the discontinuity at right angles?
Activate the transducer - ANSWER The pulser circuit in an ultrasonic
instrument is used to:
RF Display - ANSWER An A-scan CRT display which shows a signal
both above and below the sweep line is called a: (Video, RF, Audio or
Frequency modulated display)
B-scan display - ANSWER Which display shows the distance a
discontinuity is from the transducer and its length in the direction of
transducer travel?
Material Properties - ANSWER The velocity of sound in a material is
dependent upon the:
Sound wave frequency - ANSWER To vary or change the wavelength of
sound being used to test a part, you would change the:
ANSWERS 2024-2025
Discontinuity location and size (plan view). - ANSWER When a C-scan is
used to produce a permanent record of an ultrasonic test, the
information displayed is typically the:
Loss of echo amplitude from discontinuities and an increase in the width
of the front surface echo. - ANSWER Rough entry surface echo
conditions can result in:
The attenuation - ANSWER As the grain size increases in a material, its
principal effect in ultrasonic testing is on:
Decrease it - ANSWER In straight beam pulse echo testing a
discontinuity with a rough reflecting surface perpendicular to the incident
wave will have what effect on the detected signal in comparison to a
smooth flat-bottom hole of the same size? (Increase, decrease, no
effect, decrease the width of the pulse of it.)
Machine Oil - ANSWER Ultrasonic vibrations can be propagated only in
the longitudinal mode in which of the following media? (Machine oil,
Aluminum, Ice, Beryllium)
The same as the velocity at 1/2 inch - ANSWER If the velocity of a
longitudinal mode wave in a given homogeneous material is .625
cm/micro second at 1/2 inch below the surface, what is the velocity at 2
inches below the surface? (1/4 the velocity at 1/2 inch, 1/2 the velocity at
1/2 inch, the same, none of the above)
The wavelength would be shorter - ANSWER If a 5.0 MHz transducer is
substituted for a 2.25 MHz transducer (5.0 old, 2.25 new), what would be
the effect on the wavelength of a longitudinal mode wave in the test
specimen.
, All of the above - ANSWER What can cause irrelevant indications on the
display screen? (Contoured surfaces, edge effects, surface conditions,
All of the above)
Reference Standard - ANSWER A common method for the estimation of
defect size is the use of a:
Near Field - ANSWER Another name for Fresnel Zone is:
Test material parameter - ANSWER Attenuation is a: (Test display
characteristic, Test material parameter, Transducer characteristic, Form
of testing)
Decreased - ANSWER For discontinuity geometries other than flat, the
echo amplitude is usually ______ from that observed for a flat defect, of
similar orientation perpendicular to the sound beams. (identical,
increased, decreased, elongated)
Angulate the search unit - ANSWER What must be done to evaluate
discontinuities that are oriented at an angle to the entry surface so that
the sound beam will strike the plane of the discontinuity at right angles?
Activate the transducer - ANSWER The pulser circuit in an ultrasonic
instrument is used to:
RF Display - ANSWER An A-scan CRT display which shows a signal
both above and below the sweep line is called a: (Video, RF, Audio or
Frequency modulated display)
B-scan display - ANSWER Which display shows the distance a
discontinuity is from the transducer and its length in the direction of
transducer travel?
Material Properties - ANSWER The velocity of sound in a material is
dependent upon the:
Sound wave frequency - ANSWER To vary or change the wavelength of
sound being used to test a part, you would change the:
