Tag: hygiene - a key to healthy life

Questions Related to hygiene - a key to healthy life

Sewage water is purified for recycling by the action of 

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

  1. Light

  2. Micro-organisms

  3. Aquatic plants

  4. Fishes

Show answer
Correct Option: B
Explanation:

Domestic sewage primarily contains biodegradable organic matter, which readily decomposes by bacteria and other micro-organisms, which can multiply using these organic substances as substrates and hence utilise some of the components of sewage. It is possible to estimate the amount of biodegradable organic matter in sewage water by measuring biochemical oxygen demand (BOD).  

Microorganisms involved in biodegradation of organic matter in the receiving water body consume a lot of oxygen, and as a result there is a sharp decline in dissolved oxygen downstream from the point of sewage discharge. This causes mortality of fish and other aquatic creatures. 

Which is correctly matched?
1. Arsenic poisoning- Black foot disease.
2. Secondary Effluent treatment- Biological process.
3. Pyrolysis- Solid soil waste disposal
4. Tubifex- Water pollution indicator
5. Biomagnification- Degradable pollutants

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

  1. 1, 2, 3, 5

  2. 1, 3, 4, 5

  3. 2, 3, 4, 5

  4. 1, 2, 3, 4

Show answer
Correct Option: D
Explanation:

Biomagnification refers to increase in concentration of the toxicant at successive trophic levels. This happens because a toxic substance accumulated by an organism cannot be metabolised or excreted (non degradable), and is thus passed on to the next higher trophic level. This phenomenon is well known for mercury and DDT. Biological magnification often refers to the process whereby certain substances such as pesticides or heavy metals move up the food chain, work their way into rivers or lakes, and are eaten by aquatic organisms such as fish, which in turn are eaten by large birds, animals or humans. The substances become concentrated in tissues or internal organs as they move up the chain.

Therefore, the correct answer is option D.

A sewage treatment process in which a portion of the decomposer bacteria present in the waste is recycled into the beginning of the process, is called as

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

  1. Primary treatment

  2. Tertiary treatment

  3. Activated sludge treatment

  4. Cyclic treatment

Show answer
Correct Option: C
Explanation:

The activated sludge process is a process for treating sewage and industrial wastewaters using air and a biological floc composed of bacteria and protozoa. Activated sludge refers to a mass of microorganisms cultivated in the treatment process to break down organic matter into carbon dioxide, water, and other inorganic compounds. 

The activated sludge process has three basic components: 
1) A reactor in which the microorganisms are kept in suspension, aerated, and in contact with the waste they are treating,
2) Liquid-solid separation and 
3) A sludge recycling system for returning activated sludge back to the beginning of the process. 
Therefore, the correct answer is option C.

A natural disaster caused due to insufficient water for agriculture is called

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

  1. flood

  2. draught

  3. famine

  4. forest fire

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Correct Option: C

The process of mixing chlorine in the water to kill the germs is  called

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

  1. filtration

  2. chlorination

  3. purification

  4. distillation

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Correct Option: B

Dried sludge is used as

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

  1. Manure

  2. Source for biogas

  3. fertilizers

  4. Both A and B

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Correct Option: A

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

Show answer
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

Show answer
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.

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

Show answer
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

Show answer
Correct Option: A