1.

Which of the below given formulas is used to calculate hardness coefficient?

A. (Final hardness / initial hardness) × 100%
B. 20 – (loss in weight / 2)
C. 20 – (loss in weight / 3)
D. ((20 – loss in weight) / 3) × 100%
Answer» D. ((20 – loss in weight) / 3) × 100%


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