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If any surface has a scratch on it and surface is tested by surface contour test then, what is the depth of scratch? (D= distance between fringes, d= distance due to scratch)
Which of the following tests are microhardness tests? P. Brinell Hardness Q. Rockwell Hardness R. Knoop Hardness S. Vickers Hardness
Ravi and Aman are playing together while climbing a tree Aman got a big scratch on his hand. When he goes back to his home his mother applies a paste on his scratch from his kitchen that is -
Given below are some idioms/phrases followed by four alternative meanings to each. Choose the response 1, 2, 3 or 4 which is the most appropriate expression. You scratch my back. I’ll scratch yours
A sample of water when tested for hardness, gave total hardness value of 450 mg/l, and alkalinity value of 150 mg/l (on CaCO3 scale) respectively. The carbonate and noncarbonate hardness of the sample (in mg/l units) are respectively:
For the same long diagonal length of indenter of Vickers hardness and Knoop hardness, the Knoop hardness is how much percentage of the Vickers indenter?
Which of the following material has the lowest scratch hardness?
Contact pressure can be called scratch hardness only in case of __________
Minerals of equal hardness do no scratch each other.
What is the unit of scratch hardness?