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Filtration on Environmental Studies related Questions and Answers


Question :   Which of the following is correct regarding the cheapest filter material used in water treatment?
1. Sand>Anthracite>Garnet sand
2. Sand<Anthracite>Garnet sand
3. Sand<Anthracite<Garnet sand
4. Sand=Anthracite>Garnet sand
Answer :   1 - Sand>Anthracite>Garnet sand  

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