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The indenter used in C-scale of Rockwell hardness test is named _________

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The indenter used in C-scale of Rockwell hardness test is named _________

(a) CABAL

(b) BRALE

(c) BRALL

(d) IDOL

This question was posed to me during an online interview.

Question is from Hardness Tests on Metals in section Wear of Metals, Mechanical Properties and Testing of Engineering Material & Metallurgy

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Correct choice is (b) BRALE

To explain: There are many scales on which Rockwell hardness tests can be conducted. The B-scale uses a 1/16 inch diameter steel ball indenter. The C-scale uses a diamond cone indenter of 120 degrees, which is named as BRALE.

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