Tag: basics of water pollution

Questions Related to basics of water pollution

Biological control during sewage treatment is observed in 

biology wastewater story personal and public cleanliness who will do this? basics of water pollution

  1. Aerating tanks

  2. Settling tanks

  3. Anaerobic sludge digesters

  4. Primary treatment

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Correct Option: A
Explanation:

During secondary treatment, the sewage water is aerated and added with microorganisms like the bacteria and protozoa, these microorganisms degrade organic wastes in presence of oxygen

Sewage is mainly a

biology wastewater story personal and public cleanliness who will do this? basics of water pollution water borne disease hygiene - a key to healthy life

  1. liquid waste

  2. solid waste

  3. gaseous waste

  4. mixture of liquid waste and organic matter

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Correct Option: D

Aeration process change the odour of wastewater.

biology wastewater story personal and public cleanliness who will do this? basics of water pollution water borne disease hygiene - a key to healthy life

  1. True

  2. False

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Correct Option: B
Explanation:

Aeration is mixing of oxygen into the water. It increases the microbial growth in the water. The microbial growth acts on the organic matter and creates flocs which settle. The degradation of organic matter leads to the change in the pH of the water and production of gases like hydrogen sulfide which creates an odour.

So, the correct answer is option B.

Main sources of nitrogen compounds in waste water are proteins, amines, and

biology wastewater story personal and public cleanliness who will do this? basics of water pollution

  1. Urea

  2. Fats

  3. Calcium

  4. Phosphorous

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Correct Option: A

What are characteristics of 'domestic' wastewater?

biology wastewater story personal and public cleanliness who will do this? basics of water pollution

  1. Grey color, musty odour

  2. Blue color, odourless

  3. Green color, musty odour

  4. All of Above

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Correct Option: B

If large quantities of domestic sewage is continuously emptied into a small stream, it leads to

zoology environmental science personal and public cleanliness who will do this? basics of water pollution

  1. depletion of oxygen content in stream water

  2. depletion of nutrients in the stream water

  3. enrichment of oxygen content in stream water

  4. increase in the total amount of life in the stream water.

Show answer
Correct Option: A
Explanation:

If large quantities of domestic sewage are continuously emptied into a small stream, it leads to depletion of oxygen content in stream water as microbes that develop to degrade the organic matter shall consume the oxygen and reduces its amount.

So the correct option is 'depletion of oxygen content in stream water'

Water should pretreat before its disposal.

zoology environmental science personal and public cleanliness who will do this? basics of water pollution

  1. True

  2. False

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Correct Option: A

when children play bare-footed in pools of dirty water and flood water,they may suffer from

biology hygiene - a key to healthy life water borne disease basics of water pollution sewage treatment

  1. Leptospirosis and bilharzia

  2. Malaria ,amoebic dyscentry and leptospirosis

  3. Bilharzia,infective hepatitis and diarrhoea

  4. Guineaworm infection,elephantiasis and amoebic dyscentry

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Correct Option: C
Explanation:

  • Schistosomiasis, also known as snail fever and bilharzia is a disease caused by parasitic flatworms called schistosomes. The disease is spread by contact with fresh water contaminated with the parasites. The disease is especially common among children in developing countries, as they are more likely to play in contaminated water.
  • Hepatitis is an inflammation of the liver tissue. Hepatitis is majorly caused by the virus known as infective hepatitis. Infective hepatitis is mainly spread by contaminated food and water.
  • Diarrhoea is the condition of having at least three loose or liquid bowel movements each day. Diarrhoea lasts for a few days and can result in dehydration due to fluid loss. These infections are often acquired from food or water that has been contaminated by faeces, or directly from another person who is infected.
  • Hence, these diseases may occur when children play bare-footed in pools of dirty water and flood water.
So, the correct answer is 'Bilharzia, infective hepatitis and diarrhoea'.

Blue boy(Methenoglobinemia) disease is caused by the contamination of drinking water with ___________.

biology hygiene - a key to healthy life water borne disease basics of water pollution sewage treatment

  1. Chloride

  2. Nitrate

  3. Sulphate

  4. Iodide

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Correct Option: A

What causes bacillary, dysentry and diarrhoea in humans?

biology hygiene - a key to healthy life water borne disease basics of water pollution sewage treatment

  1. Bacteria

  2. Virus

  3. Food and Water contamination

  4. Amoeba

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Correct Option: C