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Water Purification and Treatment

Questions about water treatment processes, purification methods, and water quality standards including filtration, disinfection, and potable water properties

15 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Effluents are ___________.

  1. dirt of city
  2. dirt of a household
  3. dirt of a locality
  4. liquid waste flowing out of a factory or a power plant
  5. solid waste disposed of a factory or a power plant
Question 2 Multiple Choice (Single Answer)

Minute quantities of which substance is added to facilitate sedimentation?

  1. Charcoal
  2. Alum
  3. Sand
  4. Mud
  5. Sugar
Question 3 Multiple Choice (Single Answer)

Surface water is NOT obtained from which of the following?

  1. Rivers
  2. Streams
  3. Springs
  4. Lakes
  5. Seas
Question 4 Multiple Choice (Single Answer)

Boiling water for how many minutes kills the harmful germs in it?

  1. 15 - 20
  2. 2 - 5
  3. 5 - 10
  4. 30 - 40
  5. 45 - 50
Question 5 Multiple Choice (Single Answer)

Layers of which of the following substances are present in the filtration chamber?

  1. Sand and gravel
  2. Gravel and charcoal
  3. Sand, gravel and charcoal
  4. Charcoal and sand
  5. Only charcoal
Question 6 Multiple Choice (Single Answer)

Which of the following is not a property of potable water?

  1. It should be odourless
  2. It should be colourless
  3. It should be transparent
  4. It should be free from harmful chemicals
  5. It should be full of micro-organisms
Question 7 Multiple Choice (Single Answer)

Water that is suitable for drinking is called _____________.

  1. drinking water
  2. potable water
  3. clean water
  4. portable water
  5. usable water
Question 8 Multiple Choice (Single Answer)

Filtration can also be done via _____________ candles.

  1. iron
  2. sand
  3. aluminum
  4. charcoal
  5. ceramic
Question 9 Multiple Choice (Single Answer)

Which of the following is a REPLACEMENT of chlorine as a disinfectant?

  1. Fluorine
  2. Oxygen
  3. Sulphur
  4. Hydrogen
  5. Ozone
Question 10 Multiple Choice (Single Answer)

Purifiers used in home these days have which of the following stages of purification?

  1. Filtration and adsorption
  2. Filtration, adsorption, disinfection
  3. Adsorption and disinfection
  4. Only adsorption
  5. Only disinfection
Question 11 Multiple Choice (Single Answer)

Chemical treatment of water involves treatment of water with which of the following compounds?

  1. Potassium phosphate
  2. Potassium permanganate
  3. Calcium phosphate
  4. Potassium chloride
  5. Sodium phosphate
Question 12 Multiple Choice (Single Answer)

____________ lamp is used for purification of water.

  1. Violet light
  2. Red light
  3. Infra-red
  4. Ultraviolet
  5. None of these
Question 13 Multiple Choice (Single Answer)

Bleaching powder is used in __________.

  1. filtration
  2. adsorption
  3. chemical treatment
  4. reverse osmosis
  5. disinfection
Question 14 Multiple Choice (Single Answer)

Out of the total water found on the earth, how much % of water is available for consumption?

  1. 1
  2. 0.1
  3. 0.01
  4. 0.5
  5. 0.8
Question 15 Multiple Choice (Single Answer)

How many steps are involved in the purification of water in treatment plants?

  1. 2
  2. 4
  3. 5
  4. 3
  5. 6
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