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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?

To remove suspended solids (D) Signup and view all the answers

What is the result of boiling water with temporary hardness?

Temporary hardness is removed (C) Signup and view all the answers

What is the purpose of flocculation in water treatment?

To bring together small suspended solids (A) Signup and view all the answers

What is the purpose of filtration in water treatment?

To remove suspended solids (B) Signup and view all the answers

What is the definition of hard water?

Water that will not easily form a lather with soap (A) Signup and view all the answers

What is the purpose of deionisation in water treatment?

To remove calcium and magnesium ions (A) Signup and view all the answers

What is the purpose of ion exchange in water treatment?

To swap calcium and magnesium ions with sodium ions (B) Signup and view all the answers

What is the purpose of primary treatment in sewage treatment?

To screen and settle suspended solids (C) Signup and view all the answers