27 Water MCQ3
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Questions and Answers

What is the primary purpose of chlorination in water treatment?

  • To kill pathogenic bacteria (correct)
  • To remove temporary hardness
  • To remove permanent hardness
  • To strengthen teeth
  • Which of the following methods is used to remove permanent hardness?

  • Filtration
  • Boiling
  • Ion exchange (correct)
  • Deionisation
  • What is the purpose of flouridation in water treatment?

  • To remove suspended solids
  • To strengthen teeth and prevent decay (correct)
  • To remove temporary hardness
  • To kill pathogenic bacteria
  • What is the purpose of sedimentation in water treatment?

    <p>To remove suspended solids</p> Signup and view all the answers

    What is the result of boiling water with temporary hardness?

    <p>Temporary hardness is removed</p> Signup and view all the answers

    What is the purpose of flocculation in water treatment?

    <p>To bring together small suspended solids</p> Signup and view all the answers

    What is the purpose of filtration in water treatment?

    <p>To remove suspended solids</p> Signup and view all the answers

    What is the definition of hard water?

    <p>Water that will not easily form a lather with soap</p> Signup and view all the answers

    What is the purpose of deionisation in water treatment?

    <p>To remove calcium and magnesium ions</p> Signup and view all the answers

    What is the purpose of ion exchange in water treatment?

    <p>To swap calcium and magnesium ions with sodium ions</p> Signup and view all the answers

    What is the purpose of primary treatment in sewage treatment?

    <p>To screen and settle suspended solids</p> Signup and view all the answers

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