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There are no restrictions in the eddy current testing method; it can detect defects up to high depth in the castings.

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There are no restrictions in the eddy current testing method; it can detect defects up to high depth in the castings.

(a) True

(b) False

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The query is from Non Destructive Testing in portion Inspection Testing in Foundries of Casting-Forming-Welding I

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Right option is (b) False

Easy explanation: Eddy current inspection is generally restricted to the depth less than 6mm, that’s why it is not as sensitive to small open defects of high depth as liquid penetrant testing (LPT) or magnetic particle inspection (MPI). But it can replace LPT method for detection of surface connected discontinuities.

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