Question

Following test is also known as microhardness test

• A. Brinell hardness test
• B. Vickers hardness test
• C. Rockwell hardness test
• D. Knoop hardness test

Answer 1

Answer:

D. Knoop hardness test

The Knoop hardness test is a micro indentation hardness test where a small diamond indenter of pyramidal shape is used to force into the specimen. The longer diagonal of the indentation is measured for precise measurement and the Knoop hardness is calculated based on the projected area of the indent. This test is also known as a microhardness test.