Q. Loss of the test piece back wall echo during scanning may be caused by:

(A) An abnormally homogeneous material structure
(B) A smooth entry surface on the test piece
(C) A discontinuity which is not parallel to the entry surface
(D) An opposite surface which is parallel to the entry surface

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✅ Correct Answer: (C) A discontinuity which is not parallel to the entry surface

Published by Mr. Dubey ⭐ 104.85K Points at 21-Sep-2023 07:19 pm in Non Destructive Testing and Evaluation

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