NDT Final Exam Study Guide & Comprehensive Non-Destructive Testing Revision
Notes
Inherent discontinuities in the ingot casting include - correct answer ✔✔Nonmetallic inclusions
When individual elements are neither fully mixed in the heat nor separated during the cooling
process, the resulting Condition is called - correct answer ✔✔Segregation
What are rolled from an ingot and have a rectangular cross section? - correct answer ✔✔Slabs
Ideally, calibration of the horizontal axis should be done with calibration blocks - correct answer
✔✔Made of acoustically similar materials as the test object
One of the reasons phased array Provides advantages over conventional ultrasonic testing is
that - correct answer ✔✔A single probe and wedge combination can be used to sweep through
a range of angles electronically
In phased array testing, beam steering is - correct answer ✔✔Where ultrasonic beams
generated by phased array probes are swept through a range of angles using the same group of
elements
A smaller reflector hidden by another Larger discontinuity - correct answer ✔✔May not be
detected at all
Which type of transducer has an angled - correct answer ✔✔Duel
Planer discontinuities, with a principal reflecting surface perpendicular to the surface of
ultrasonic wave entry, our best detected using - correct answer ✔✔Sound beams traveling at
relatively steep angles to the entry surface
, Cracking is usually detected with - correct answer ✔✔Shear wave transducers
Do you adapt a transducer to a curved test object during immersion testing - correct answer
✔✔Contour correcting in lens maybe used
Which type of discontinuity is the most difficult to detect with a conventional longitudinal wave
transducer? - correct answer ✔✔Discontinuities perpendicular to the entry surface
Which of the following internal discontinuities do not tend to scatter reflected sound in a
random manner? - correct answer ✔✔Laminations
Laminar discontinuities are detecting using which waves directed through the width of the
material? - correct answer ✔✔Longitudinal
When testing objects with flat surfaces, calibration of the vertical axis uses - correct answer
✔✔Calibration blocks with specific sized flat bottoms or side drilled holes
Lack of fusion is a discontinuity that occurs when the molten weld metal - correct answer
✔✔Does not fuse into the base metal or previous weld layer
Lack of fusion at the original beveled surface of a V groove weld - correct answer ✔✔Gives the
largest signal when the primary ultrasound direction is perpendicular to that discontinuities
surface
In general, all of the following can be classified as non-relevant indications except - correct
answer ✔✔Transverse cracks
Notes
Inherent discontinuities in the ingot casting include - correct answer ✔✔Nonmetallic inclusions
When individual elements are neither fully mixed in the heat nor separated during the cooling
process, the resulting Condition is called - correct answer ✔✔Segregation
What are rolled from an ingot and have a rectangular cross section? - correct answer ✔✔Slabs
Ideally, calibration of the horizontal axis should be done with calibration blocks - correct answer
✔✔Made of acoustically similar materials as the test object
One of the reasons phased array Provides advantages over conventional ultrasonic testing is
that - correct answer ✔✔A single probe and wedge combination can be used to sweep through
a range of angles electronically
In phased array testing, beam steering is - correct answer ✔✔Where ultrasonic beams
generated by phased array probes are swept through a range of angles using the same group of
elements
A smaller reflector hidden by another Larger discontinuity - correct answer ✔✔May not be
detected at all
Which type of transducer has an angled - correct answer ✔✔Duel
Planer discontinuities, with a principal reflecting surface perpendicular to the surface of
ultrasonic wave entry, our best detected using - correct answer ✔✔Sound beams traveling at
relatively steep angles to the entry surface
, Cracking is usually detected with - correct answer ✔✔Shear wave transducers
Do you adapt a transducer to a curved test object during immersion testing - correct answer
✔✔Contour correcting in lens maybe used
Which type of discontinuity is the most difficult to detect with a conventional longitudinal wave
transducer? - correct answer ✔✔Discontinuities perpendicular to the entry surface
Which of the following internal discontinuities do not tend to scatter reflected sound in a
random manner? - correct answer ✔✔Laminations
Laminar discontinuities are detecting using which waves directed through the width of the
material? - correct answer ✔✔Longitudinal
When testing objects with flat surfaces, calibration of the vertical axis uses - correct answer
✔✔Calibration blocks with specific sized flat bottoms or side drilled holes
Lack of fusion is a discontinuity that occurs when the molten weld metal - correct answer
✔✔Does not fuse into the base metal or previous weld layer
Lack of fusion at the original beveled surface of a V groove weld - correct answer ✔✔Gives the
largest signal when the primary ultrasound direction is perpendicular to that discontinuities
surface
In general, all of the following can be classified as non-relevant indications except - correct
answer ✔✔Transverse cracks
