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NDT ULTRASONIC LEVEL 1 EXAM
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NDT ULTRASONIC LEVEL 1 EXAMthe velocity of the longitudinal wave is determined by the - ANSWER
material properties
the material in a search unit which controls the search unit ringing is
called - ANSWER the damping material
which of the following search units would contain the thinnest crystal -
ANSWER the crystal vibrating at the highest frequency
piezoelectric crystals convert - ANSWER electrical energy to mechanical
energy
or mechanical energy to electrical
the number of complete waves which pass a given point in a given time
period is referred to as the - ANSWER frequency
ultrasonic sound is defined as sound whose frequencies exceed -
ANSWER 20000 Hz
what is the formula for for solving for wavelength - ANSWER W=V/F
which instrument control is used to adjust signal height - ANSWER gain
if frequency is increased in a given material, wavelength will - ANSWER
decrease
which instrument control alters the spacing between signals - ANSWER
range
the indication on the oscilloscope screen which represents the far
boundary of the material being tested is called - ANSWER the back
reflection
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