2. Sample Papers
  3. 7th Class
  4. Science

7th Class Science Sample Paper Science Sample Paper-1

  • question_answer
    The floating materials left over in the first sedimentation tank which do not settle down is removed by:

    A) Screener           

    B) Skimmer

    C) Digester     

    D) All of these

    E) None of these

    Correct Answer: B

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