7th Class Science Wastewater Story Question Bank Wastewater Story

  • question_answer After passing that through bar screens the waste water goes to a grit and sand removed tank. Here the speed of incoming waste water is decreased

    A) to keep the system under control

    B) to allow sand, grit and pebbles to settle down.

    C) to allow foul smell to disappear

    D) All the above are correct

    Correct Answer: B

    Solution :

    to allow sand, grit and pebbles to settle down.

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