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What term is used to describe water that is safe for humans to drink? PotablePureBottledSterilised2What are the two main stages in the treatment of ground water to make it potable?Desalination and sterilisationDistillation and desalinationPassing it through filter beds and sterilisationPassing it through filter beds and desalination3Which of the following is not a method or substance used to kill microbes during the purification of water?UV lightOzoneAntibioticsChlorine4Which two processes can be used to make drinking water from sea water? Filtration and sterilisationDistillation and reverse osmosisFiltration and reverse osmosisDistillation and anaerobic digestion5In the treatment of waste water, sewage is screened to remove large pieces and then filtered to produce sewage sludge. How is the remaining liquid (or effluent) then treated? Aerobic biological treatmentAnaerobic digestionBoilingSterilisation6What are two possible uses of sewage sludge after further treatment? Animal feed and fertiliserFertiliser and potable waterBuilding material and renewable energy sourceFertiliser and renewable energy source

Question

What term is used to describe water that is safe for humans to drink? PotablePureBottledSterilised2What are the two main stages in the treatment of ground water to make it potable?Desalination and sterilisationDistillation and desalinationPassing it through filter beds and sterilisationPassing it through filter beds and desalination3Which of the following is not a method or substance used to kill microbes during the purification of water?UV lightOzoneAntibioticsChlorine4Which two processes can be used to make drinking water from sea water? Filtration and sterilisationDistillation and reverse osmosisFiltration and reverse osmosisDistillation and anaerobic digestion5In the treatment of waste water, sewage is screened to remove large pieces and then filtered to produce sewage sludge. How is the remaining liquid (or effluent) then treated? Aerobic biological treatmentAnaerobic digestionBoilingSterilisation6What are two possible uses of sewage sludge after further treatment? Animal feed and fertiliserFertiliser and potable waterBuilding material and renewable energy sourceFertiliser and renewable energy source

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Solution

  1. The term used to describe water that is safe for humans to drink is "Potable".

  2. The two main stages in the treatment of ground water to make it potable are "Passing it through filter beds and sterilisation".

  3. "Antibiotics" is not a method or substance used to kill microbes during the purification of water.

  4. The two processes that can be used to make drinking water from sea water are "Distillation and reverse osmosis".

  5. In the treatment of waste water, sewage is screened to remove large pieces and then filtered to produce sewage sludge. The remaining liquid (or effluent) is then treated through "Aerobic biological treatment".

  6. Two possible uses of sewage sludge after further treatment are "Fertiliser and renewable energy source".

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