NDI UT Level 2 ASNT Test questions with verified answers

NDI UT Level 2 ASNT Test questions with verified answersFresnel zone the interference field near the face of a transducer is often referred to as the _____ Angle of Reflection in a test where the transducer is not perpendicular to the inspection surface, the angle of incidence is equal to _________ A Marker 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 the phenomenon whereby an ultrasonic wave changes direction when the wave crosses a boundary between materials with different velocities is called _________ Surface Waves another name for Rayleigh Waves is _____ Coaxial Cable 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 _______ Longitudinal Wave another name for compressional name is_______ Crystal the piezoelectric material in a search unit which vibrates to produce ultrasonic waves is called a _______ Frequency and Crystal Size the amount of beam divergence from a crystal is primarily dependent on the __________ Refraction 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 25 million cycles per second can also be stated as ______ A Coarse-Grained Casting 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 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 when the motion of the particles of a medium is transverse to the direction of propagation, the wave being transmitted is called a ____________ Velocity a term used in ultrasonics to express the rate at which sound waves pass through various substances is _________ Vertical Level 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 _______ Elapsed Time or Distance in an A-scan presentation the horizontal base line represents _____ Laminar-Type Flaws with Major Dimensions Parallel to the Rolled Surface an ultrasonic test using straight beam contact search unit is being conducted through the thickness of a flat part such as a plate. this test should detect _______ 20 000 Hz sound waves of a frequency beyond the hearing range of the human ear are referred to as ultrasonic waves or vibrations, and the term embraces all vibrational waves of frequency greater than approx. _________ The Material in which the Sound is Being Transmitted and the Mode of Vibration the velocity of sound waves is primarily dependent on ________ Snell's Law The formula used to calculate the angle of refraction within a material is called _________