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For hardness test of copper in Brinell hardness tester, the diameter of ball is ___________(a) 7mm(b) 1mm(c) 5mm(d) 3mmThis question was posed to me during an internship interview.The question is from Compression Test topic in portion Testing of Concrete of Concrete Technology

Answer»

Correct OPTION is (c) 5mm

Explanation: ASTM E-10 is a standard TEST for determining the Brinell HARDNESS of metallic materials. The load applied in this test is usually 3,000, 1,500, or 500 KGF, so that the diameter of the INDENTATION is 5 mm.



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