PHASED ARRAY LEVEL II – ASNT
QUESTIONS AND CORRECT DETAILED
ANSWERS | SCORED A+ | NEW UPDATE
2025
Early through-transmission ultrasound-based techniques were less sensitive to:
Joint geometry.
Orientation of inspected part.
Small defects and discontinuities.
The coupling medium used. - ANSWER Small defects and discontinuities.
When supported, the transmitted and refracted shear wave is ___ with respect to
the longitudinal wave:
Twice the energy
At a lower refracted angle
At the same angle
At a greater refracted angle - ANSWER At a lower refracted angle
The refracted beam angle is proportional in accordance with:
C.6
Snell's law, the incident angle, and relative sound speed between materials.
Snell's law, the incident angle, and the relative impedance between materials.
The diffraction equation and the relative sound speed between materials.
,The diffraction equation and the relative impedance between materials. -
ANSWER Snell's law, the incident angle, and relative sound speed between
materials.
The second critical angle occurs when:
The transmitted longitudinal wave reaches 90°.
The incident longitudinal wave reaches 90°.
The refracted shear wave reaches 90°.
The reflected longitudinal wave reaches 90° - ANSWER The refracted shear
wave reaches 90°.
Waves that combine in phase reinforce each other, while waves that combine ___
will cancel each other.
Out of phase
Due to Lorentz force
At peak frequency
Due to anisotropic effects - ANSWER Out of phase
In order to facilitate beam steering and focusing, time delays (focal laws) are
applied to:
Both the transmission pulse and the acquisition signal.
The transmission pulse only.
The acquisition signal only.
Neither the transmission pulse nor the acquisition signal - ANSWER Both the
transmission pulse and the acquisition signal.
, The internal clock of a circuit is designed to:
Coordinate the pulsers, receivers, and other components to a common time.
Generate a time stamp for acquired data.
Keep time when the system is turned off.
Not be used in most applications. - ANSWER Coordinate the pulsers, receivers,
and other components to a common time.
Which circuit triggers the pulser and sweep circuits in an A-scan display?
Receiver-amplifier.
Transducer.
Clock.
Damping - ANSWER Clock
The focal law generator takes into account:
C.9
The pitch and spacing of the probe, as well as the relative geometry and materials
of the inspected part.
The element size of the probe, as well as the relative geometry of the part.
Only the geometry of the part.
The pitch and spacing of the probe, as well as the
materials of the inspected part. - ANSWER The pitch and spacing of the probe,
as well as the relative geometry and materials of the inspected part.
External focal law generators can often produce higher quality images over
onboard calculators because they:
QUESTIONS AND CORRECT DETAILED
ANSWERS | SCORED A+ | NEW UPDATE
2025
Early through-transmission ultrasound-based techniques were less sensitive to:
Joint geometry.
Orientation of inspected part.
Small defects and discontinuities.
The coupling medium used. - ANSWER Small defects and discontinuities.
When supported, the transmitted and refracted shear wave is ___ with respect to
the longitudinal wave:
Twice the energy
At a lower refracted angle
At the same angle
At a greater refracted angle - ANSWER At a lower refracted angle
The refracted beam angle is proportional in accordance with:
C.6
Snell's law, the incident angle, and relative sound speed between materials.
Snell's law, the incident angle, and the relative impedance between materials.
The diffraction equation and the relative sound speed between materials.
,The diffraction equation and the relative impedance between materials. -
ANSWER Snell's law, the incident angle, and relative sound speed between
materials.
The second critical angle occurs when:
The transmitted longitudinal wave reaches 90°.
The incident longitudinal wave reaches 90°.
The refracted shear wave reaches 90°.
The reflected longitudinal wave reaches 90° - ANSWER The refracted shear
wave reaches 90°.
Waves that combine in phase reinforce each other, while waves that combine ___
will cancel each other.
Out of phase
Due to Lorentz force
At peak frequency
Due to anisotropic effects - ANSWER Out of phase
In order to facilitate beam steering and focusing, time delays (focal laws) are
applied to:
Both the transmission pulse and the acquisition signal.
The transmission pulse only.
The acquisition signal only.
Neither the transmission pulse nor the acquisition signal - ANSWER Both the
transmission pulse and the acquisition signal.
, The internal clock of a circuit is designed to:
Coordinate the pulsers, receivers, and other components to a common time.
Generate a time stamp for acquired data.
Keep time when the system is turned off.
Not be used in most applications. - ANSWER Coordinate the pulsers, receivers,
and other components to a common time.
Which circuit triggers the pulser and sweep circuits in an A-scan display?
Receiver-amplifier.
Transducer.
Clock.
Damping - ANSWER Clock
The focal law generator takes into account:
C.9
The pitch and spacing of the probe, as well as the relative geometry and materials
of the inspected part.
The element size of the probe, as well as the relative geometry of the part.
Only the geometry of the part.
The pitch and spacing of the probe, as well as the
materials of the inspected part. - ANSWER The pitch and spacing of the probe,
as well as the relative geometry and materials of the inspected part.
External focal law generators can often produce higher quality images over
onboard calculators because they:
