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  1. The following characteristics pertain to the sand filters used in water industry.

    1. Filtration rate is 1 to 4 m3 (m2 day).
    2. Typical duration of operation in one run is 24 to 72 hours.
    3. Operating cost is low.

    Which of the above characteristics pertain to slow sand filters ?

    2. A.
    I, II and III
    B.
    I and II
    C.
    II and III
    D.
    I and III

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    Answer : Option D

    Explanation :

    No answer description available for this question. Let us discuss.

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