QUESTIONS WITH 100% CORRECT
ANSWERS | LATEST VERSION 2025/2026.
Fresnel zone - ANS the interference field near the face of a transducer is often referred to as
the _____
Angle of Reflection - ANS in a test where the transducer is not perpendicular to the
inspection surface, the angle of incidence is equal to _________
A Marker - ANS a separate time base line imposed on the viewing screen of some ultrasonic
testing instruments that permits measurement of distances is often referred to as ________
Refraction - ANS the phenomenon whereby an ultrasonic wave changes direction when the
wave crosses a boundary between materials with different velocities is called _________
Surface Waves - ANS another name for Rayleigh Waves is _____
Coaxial Cable - ANS the cable that connects the ultrasonic instrument to the search unit
especially designed so that one conductor is centered inside another. the technical name for
such cable is _______
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, Longitudinal Wave - ANS another name for compressional wave is_______
Crystal - ANS the piezoelectric material in a search unit which vibrates to produce ultrasonic
waves is called a _______
Frequency and Crystal Size - ANS the amount of beam divergence from a crystal is primarily
dependent on the __________
Refraction - ANS when an ultrasonic beam passes through the interface between two
dissimilar materials at an angle, a new angle of sound travel takes place in the second material
due to ________
25 MHz - ANS 25 million cycles per second can also be stated as ______
A Coarse-Grained Casting - ANS which of the following materials of the same alloy is most
likely to produce the greatest amount of sound attenuation over a given distance?
Longitudinal Wave - ANS when the motion of the particles of a medium is parallel to the
direction of propagation, the wave being transmitted is called a _________
Shear Wave - ANS when the motion of the particles of a medium is transverse to the
direction of propagation, the wave being transmitted is called a ____________
Velocity - ANS a term used in ultrasonics to express the rate at which sound waves pass
through various substances is _________
Vertical Level - ANS when a vertical indication has reached the maximum signal height which
can be displayed or viewed on the CRT of an ultrasonic instrument, the indication is said to have
reached its _______
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