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Which of the following is the most suitable abrasive for grinding high tensile strength materials?

A. Silicon carbide

B. Corundum

C. Aluminium oxide

D. Boron carbide

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
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  21. Heat release during phase change is observed in case of a/an
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  25. Natural water contains approximately __________ percent of heavy water.
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  27. The bolt is subjected to __________ when the nut is tightened by putting the washer beneath it.
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