Question :
Consider the following statements regarding sand as filter material.
1. It should be free from clay or silt
2. Organic matter should be present in the sand
3. It should be nonuniform
Which of the above statement is/are correct?
1. 1, 2
2. 1 only
3. 2, 3
4. 1, 2, 3
Answer :
2 - 1 only
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