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Define the procedure to determine flaw by transducer.
Procedure to find flaw:
Cross section of typical contact transducer
Ultrasonic flaw detection is fundamentally a comparative technique. By using suitable reference standards including knowledge of sound wave propagation and usually accepted test procedures, a trained operator knows exact echo patterns corresponding to the echo response through good parts and through representative flaws. The echo pattern through a test piece may after that, be compared to the patterns from such calibration standards to find out its condition.
Write down the condition for the construction of good auditoria. Illustrate the reflection of waves at closed and open ends.
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Absorbance spectrophotometer: A schematic diagram of a simple instrument that is used to measure the absorption of visible light is shown in Figure below. When studyin
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