Which of the following hardness test is a micro hardness test ?
Correct answer: B. Knoop
- A. Brinnel
- B. Knoop
- C. Shore-A
- D. Rockwell
Explanation
The Knoop test uses a small diamond indenter and low loads, so it is designed for microhardness testing of thin sections and small areas. Brinell and Rockwell are conventional macrohardness tests, while Shore-A measures rubber-like materials.
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