Tag: sewage treatment

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Multiple choice 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

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

  1. filtration

  2. chlorination

  3. purification

  4. distillation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Chlorination is the specific chemical process of adding chlorine to water to disinfect it and kill harmful germs. Filtration removes physical particles, whereas chlorination targets biological pathogens.

Multiple choice zoology diseases and immunity basics of water pollution sewage treatment wastewater treatment - need and methods personal and public cleanliness who will do this?

Excess nitrates in water cause problems for the Chesapeake Bay because

  1. They cause excessive cellular respiration in plants and animals, resulting in a large amount of carbon dioxide production.

  2. They cause excessive bacteria growth resulting in too much oxygen which hurts photosynthesis in plants.

  3. They cause excessive algae growth, blocking sunlight and reducing oxygen when the algae dies.

  4. Nitrates are poisonous to fish, crabs, and oysters.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Excess nitrates from runoff lead to eutrophication, causing rapid algae growth. When this algae dies, its decomposition by bacteria consumes dissolved oxygen, creating hypoxic conditions that harm aquatic life.

Multiple choice zoology diseases and immunity basics of water pollution sewage treatment wastewater treatment - need and methods personal and public cleanliness who will do this?

Mark the correct statement about nitrification


(a) Nitrification is important is agricultural system.
(b) Nitrification increase nitrogen leaching.
(c) Plays important role in removal of nitrogen from municipal waste water.

  1. a, b, c

  2. a, b

  3. a, c

  4. b, c
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Nitrification is a biological oxidation process includes convertion of Ammonia to Nitrate increases nitrogen leaching because nitrate is more water soluble than Ammonia.

Multiple choice evs who will do this? personal and public cleanliness basics of water pollution sewage treatment

An example of water-borne disease is 

  1. Scabies

  2. Influenza

  3. Trachoma

  4. Typhoid
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Typhoid is a classic example of a water-borne disease caused by the bacterium Salmonella Typhi, typically spread through contaminated water or food. Scabies is a skin infestation, influenza is respiratory, and trachoma is an eye infection.

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

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

  1. Leptospirosis and bilharzia

  2. Malaria ,amoebic dyscentry and leptospirosis

  3. Bilharzia,infective hepatitis and diarrhoea

  4. Guineaworm infection,elephantiasis and amoebic dyscentry
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

Which one of the following diseases is not due to contamination of water ?

  1. Hepatitis-B

  2. Jaundice

  3. Cholera

  4. Typhoid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hepatitis B is a viral infection. It shows symptoms like nausea, vomiting, weakness, fatigue, etc. It is a type of liver infection that develops liver cirrhosis at a later stage. It also increases the risk of developing liver failure or cancer. It is spread through sexual contact or from mother to fetus. 

So, option A is the correct answer.