NDT UT Level 2 Exam with all Correct & 100% Verified
Answers |Actual Complete Update |Already Graded A+
(Just Released)
When a C-scan is used to produce a permanent record of an ultrasonic test, the information
displayed is typically the: ✔Correct Answer-Discontinuity location and size (plan view).
Rough entry surface echo conditions can result in: ✔Correct Answer-Loss of echo amplitude
from discontinuities and an increase in the width of the front surface echo.
As the grain size increases in a material, its principal effect in ultrasonic testing is on:
✔Correct Answer-The attenuation
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.) ✔Correct Answer-Decrease it
Ultrasonic vibrations can be propagated only in the longitudinal mode in which of the following
media? (Machine oil, Aluminum, Ice, Beryllium) ✔Correct Answer-Machine Oil
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) ✔Correct
Answer-The same as the velocity at 1/2 inch
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. ✔Correct
Answer-The wavelength would be shorter
What can cause irrelevant indications on the display screen? (Contoured surfaces, edge effects,
surface conditions, All of the above) ✔Correct Answer-All of the above
A common method for the estimation of defect size is the use of a: ✔Correct Answer-
Reference Standard
Another name for Fresnel Zone is: ✔Correct Answer-Near Field
Attenuation is a: (Test display characteristic, Test material parameter, Transducer characteristic,
Form of testing) ✔Correct Answer-Test material parameter
, 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) ✔Correct Answer-Decreased
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? ✔Correct
Answer-Angulate the search unit
The pulser circuit in an ultrasonic instrument is used to: ✔Correct Answer-Activate the
transducer
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) ✔Correct Answer-RF Display
Which display shows the distance a discontinuity is from the transducer and its length in the
direction of transducer travel? ✔Correct Answer-B-scan display
The velocity of sound in a material is dependent upon the: ✔Correct Answer-Material
Properties
To vary or change the wavelength of sound being used to test a part, you would change the:
✔Correct Answer-Sound wave frequency
When contact testing, if the ultrasonic instrument is set with an excessively high pulse
repetition rate, what may occur? ✔Correct Answer-Ghost or "phantom" indications will
appear on screen during scanning. (Wrap around)
The advantages of Immersion testing include: ✔Correct Answer-Increased inspection speed,
ability to control and direct sound beams and adaptability for automated scanning are all
advantages of what form of testing.
Longitudinal wave velocity in water is approximately one-fourth the velocity in aluminum or
steel. Therefore the minimum water path should be? ✔Correct Answer-One-fourth the test
piece thickness plus 1/4 inch.
In immersion testing a wetting agent is added to the water to: ✔Correct Answer-Help
eliminate the formation of air bubbles
The indication on the display screen which represents the far boundary of the material being
tested is called: ✔Correct Answer-The back surface reflection
In immersion testing, the position of the search unit is often varied to transmit sound into the
test part at various angles to the front surface. Such a procedure is referred to as: ✔Correct
Answer-Angulation
Answers |Actual Complete Update |Already Graded A+
(Just Released)
When a C-scan is used to produce a permanent record of an ultrasonic test, the information
displayed is typically the: ✔Correct Answer-Discontinuity location and size (plan view).
Rough entry surface echo conditions can result in: ✔Correct Answer-Loss of echo amplitude
from discontinuities and an increase in the width of the front surface echo.
As the grain size increases in a material, its principal effect in ultrasonic testing is on:
✔Correct Answer-The attenuation
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.) ✔Correct Answer-Decrease it
Ultrasonic vibrations can be propagated only in the longitudinal mode in which of the following
media? (Machine oil, Aluminum, Ice, Beryllium) ✔Correct Answer-Machine Oil
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) ✔Correct
Answer-The same as the velocity at 1/2 inch
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. ✔Correct
Answer-The wavelength would be shorter
What can cause irrelevant indications on the display screen? (Contoured surfaces, edge effects,
surface conditions, All of the above) ✔Correct Answer-All of the above
A common method for the estimation of defect size is the use of a: ✔Correct Answer-
Reference Standard
Another name for Fresnel Zone is: ✔Correct Answer-Near Field
Attenuation is a: (Test display characteristic, Test material parameter, Transducer characteristic,
Form of testing) ✔Correct Answer-Test material parameter
, 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) ✔Correct Answer-Decreased
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? ✔Correct
Answer-Angulate the search unit
The pulser circuit in an ultrasonic instrument is used to: ✔Correct Answer-Activate the
transducer
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) ✔Correct Answer-RF Display
Which display shows the distance a discontinuity is from the transducer and its length in the
direction of transducer travel? ✔Correct Answer-B-scan display
The velocity of sound in a material is dependent upon the: ✔Correct Answer-Material
Properties
To vary or change the wavelength of sound being used to test a part, you would change the:
✔Correct Answer-Sound wave frequency
When contact testing, if the ultrasonic instrument is set with an excessively high pulse
repetition rate, what may occur? ✔Correct Answer-Ghost or "phantom" indications will
appear on screen during scanning. (Wrap around)
The advantages of Immersion testing include: ✔Correct Answer-Increased inspection speed,
ability to control and direct sound beams and adaptability for automated scanning are all
advantages of what form of testing.
Longitudinal wave velocity in water is approximately one-fourth the velocity in aluminum or
steel. Therefore the minimum water path should be? ✔Correct Answer-One-fourth the test
piece thickness plus 1/4 inch.
In immersion testing a wetting agent is added to the water to: ✔Correct Answer-Help
eliminate the formation of air bubbles
The indication on the display screen which represents the far boundary of the material being
tested is called: ✔Correct Answer-The back surface reflection
In immersion testing, the position of the search unit is often varied to transmit sound into the
test part at various angles to the front surface. Such a procedure is referred to as: ✔Correct
Answer-Angulation
