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X-rays can be used to inspect materials of steel up to a thickness of __________ inches.(a) 3(b) 15(c) 0.3(d) 26The question was posed to me in an international level competition.The origin of the question is Testing Aircraft Materials topic in chapter Testing Aircraft Materials of Aerospace Materials & Processes

Answer»

Correct answer is (a) 3

The best I can explain: X-rays can be USED to inspect materials MADE up of steel sufficiently up to a thickness of THREE inches. If the material being inspected is not as dense as steel, it can also be TESTED for a HIGHER thickness value.



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