AWS NDE Coordination Practice Questions - AWS CWI SCWI Nondestructive Examination (NDE) Coordination Endorsement Exam

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Liquid penetrant testing (PT) is the preferred surface method for inspecting a weld in austenitic stainless steel primarily because:

PT penetrates several inches below the surface Austenitic stainless steel is non-magnetic, so MT will not work PT does not require any surface cleaning PT can size the depth of internal discontinuities

Correct Answer:

Austenitic stainless steel is non-magnetic, so MT will not work

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