With which of the following NDE processes is it possible to detect both surface and slight subsurface defects up to 2mm below the surface a) Visual b) Dye Penetrant c) Magnetic Particle using DC d) Magnetic particle using AC

With which of the following NDE processes is it possible to detect both surface and slight subsurface defects up to  2mm below the surface
a) Visual b) Dye Penetrant c) Magnetic Particle using DC d) Magnetic particle using AC
by

1 Answer

Answer :

c) Magnetic Particle using DC
by

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