Q
As compared to rapid sand filters, slow sand filters give______________?
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A
A. 1) slower filtration rate
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B
B. 2) higher filtration rate
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C
C. 3) lesser efficiency in removal of bacteria
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D
D. 4) higher efficiency in removal of bacteria
Correct Answer:
1) Slower filtration rate
2) higher filtration rate
3) lesser efficiency in removal of bacteria
4) higher efficiency in removal of bacteria