7th Class Science Wastewater Story Question Bank Wastewater Story

  • question_answer 96)

    DIRECTION: ¬†Carefully observe pictures given below and answer the following questions.     Look at the above diagram of sewage treatment plant and answer the questions that follow.  

    Why are bar screens used?

    A) To remove germs

    B) To remove sand and grit

    C) To remove cans, plastics, napkins etc.

    D) To remove oil and grease

    Correct Answer: C

    Solution :

    To remove cans, plastics, napkins etc.

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