Question

In dorry abrasion test, the hardness of the rock sample is expressed in an empirical formula____.

• A. Coefficient of hardness = 16 – loss in weight (in gm) /5
• B. Coefficient of hardness = 20 – loss in weight (in gm) /5
• C. Coefficient of hardness = 25 – loss in weight (in gm) /5
• D. Coefficient of hardness = 20 – loss in weight (in gm) /3

Answer 1

Answer: (D)