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Dye penetrant inspection reveals

  • A.flaws that break the surface of the component
  • B.internal pores lying well below the outer surface
  • C.the average grain size of the fired ceramic
  • D.the overall chemical purity of the material

Answer: A

A coloured liquid is drawn into any surface-connected crack and drawn back out onto a developer. It says nothing about internal flaws, for which radiography or ultrasonics is needed. Each method has its own detection limit and its own blind spots.

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