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Q. |
The effective size of sand particles for rapid sand filters varies from |
A. | 0.30 to 0.35 mm |
B. | 0.35 to 0.50 mm |
C. | 0.50 to 0.65 mm |
D. | 0.65 to 0.75 mm |
Answer» B. 0.35 to 0.50 mm |
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