Q. Which of the following metals must be tested with low halogen sulphur free penetrant materials:

  • (A) Copper, silver, gold
  • (B) Nickel based alloys, certain stainless steel materials
  • (C) Steel, iron, aluminium
  • (D) Plastic, wood, paper
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✅ Correct Answer: (D) Plastic, wood, paper

Published by Mr. Dubey ⭐ 111.54K Points at 21-Sep-2023 07:17 pm in Non Destructive Testing and Evaluation

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