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In the water treatment plant different materials are used as filters. The most common been used is/are _____?

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In the water treatment plant different materials are used as filters. The most common been used is/are _____? Answer: Sand and gravel

In water treatment plants, sand and gravel are the most widely used filtration media. They effectively remove suspended particles, sediment, and some pathogens during the physical filtration process.

Question context

This question is part of 🧬 Biochemistry within the broader 🧬 Medical Science subject and appears in the ETEA Educational Testing and Evaluation Agency preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.