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Half wave DC is more penetrative in magnaflux testing than full wave DC.(a) True(b) FalseThis question was addressed to me in a job interview.The query is from Magnaflux Test topic in section Non Destructive Techniques of Casting-Forming-Welding II

Answer»

Right answer is (a) True

Explanation: For the detection of sub SURFACE DEFECTS, a FULL wave direct current is needed. For the detection of surface BREAKING indication, a half wave direct current is needed. A half wave direct current is more penetrative than full wave direct current.



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