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It is vital that surfaces that have to be tested to determine the hardness of the material must be free of _____(a) ridges(b) evenness(c) smoothness(d) thicknessThis question was posed to me in class test.My question is based upon Aircraft Materials in chapter Testing Aircraft Materials of Aerospace Materials & Processes |
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Answer» CORRECT option is (a) RIDGES For explanation I would say: In order to perform tests on the material, it must meet CERTAIN standards. It should have the required thickness to AVOID bulging and must be free of ridges and SCRATCHES. It should be even and smooth. |
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