What nondestructive testing method requires little or no part preparation, is used to detect surface or near-surface defects in most metals, and may also be used to separate metals or alloys and their heat-treat conditions?
a. eddy current inspection. b. ultrasonic inspection. c. magnetic particle inspection.

Eddy current inspection

Explanation:

According to my research on nondestructive testing methods, I can say that based on the information provided within the question the method being described is called Eddy current inspection. This is a method that uses electromagnetic induction to detect and characterize surface and sub-surface flaws in conductive materials

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