The U.C. (uniformity coefficient) D₆₀/D₁₀ for the best filter media sand should be

The U.C. (uniformity coefficient) D₆₀/D₁₀ for the best filter

1.	The U.C. (uniformity coefficient) D₆₀/D₁₀ for the best filter media sand should be
A.	2
B.	3
C.	4
D.	5
Answer» B. 3