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Which of the following categories is not the part of hardness testing of materials or castings?(a) Scratch test(b) Indentation test(c) Shear test(d) Rebound testThis question was addressed to me during an online exam.The doubt is from Testing of Mechanical Properties topic in division Inspection Testing in Foundries of Casting-Forming-Welding I

Answer»

Right OPTION is (c) Shear test

Explanation: In the mechanical PROPERTIES of material, hardness is basically defined as the RESISTANCE of a material to penetration. To characterize hardness, it can be divided into three primary categories such as scratch test, REBOUND test and indentation test. Shear test is not the part of hardness testing; it is used to MEASURE shearing strength of the material.



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