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In pulse-echo method, which defect does the following amplitude-time graph represent?(a) No defect(b) Small defect(c) Mediocre defect(d) Large defectThe question was posed to me in class test.This interesting question is from Ultrasonic Inspection in chapter Non Destructive Techniques of Casting-Forming-Welding II

Answer»

The correct answer is (a) No defect

The best I can EXPLAIN: Ultrasonic inspection METHOD further gets classified under one of the type of called pulse-ECHO method. It is the most commonly used ultrasonic testing method. The following GRAPH represents a no defect in pulse echo method.



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