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NDT UT Level 2-Questions with Correct Answers/ Verified/ Latest 2024/2025
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NDT UT Level 2-Questions with Correct Answers/ Verified/ Latest 2024/2025
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NDT UT Level 2-Questions with Correct Answers/ Verified/ Latest2024/2025
Discontinuity location and size (plan view). - ✔✔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. - ✔✔Rough entry surface echo conditions can result in:
The attenuation - ✔✔As the grain size increases in a material, its principal effect in
ultrasonic testing is on:
Decrease it - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔What can cause irrelevant indications on the display screen?
(Contoured surfaces, edge effects, surface conditions, All of the above)
Reference Standard - ✔✔A common method for the estimation of defect size is the use of a:
, Near Field - ✔✔Another name for Fresnel Zone is:
Test material parameter - ✔✔Attenuation is a: (Test display characteristic, Test material
parameter, Transducer characteristic, Form of testing)
Decreased - ✔✔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 - ✔✔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 - ✔✔The pulser circuit in an ultrasonic instrument is used to:
RF Display - ✔✔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 - ✔✔Which display shows the distance a discontinuity is from the transducer
and its length in the direction of transducer travel?
Material Properties - ✔✔The velocity of sound in a material is dependent upon the:
Sound wave frequency - ✔✔To vary or change the wavelength of sound being used to test a
part, you would change the:
Ghost or "phantom" indications will appear on screen during scanning. (Wrap around) -
✔✔When contact testing, if the ultrasonic instrument is set with an excessively high pulse
repetition rate, what may occur?
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