Tag: water borne disease

Questions Related to water borne disease

Which is first stage of waste treatment plant?

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  1. Preliminary Treatment

  2. Primary Treatment

  3. Secondary Treatment

  4. Tertiary Treatment

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Correct Option: A

Activated sludge acts as inoculum in:

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  1. Primary treatment

  2. Secondary treatment

  3. Tertiary treatment

  4. More that one option

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Correct Option: A
Explanation:

A.Primary treatment – Removal of large and small particles from sewage through sequential filtration and sedimentation is called primary treatment.

B.Secondary treatment – It involves biological process of microbial degradation of organic matter contained in sewage effluent. In this activated sludge acts an inoculum.

C.Tertiary treatment – There is no occurrence of tertiary sewage treatment.

So, the correct option is ‘Secondary treatment’.    

What does sewage consist of?

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  1. Fuel waste

  2. Faeces

  3. Paper waste

  4. Nutrient

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Correct Option: B

Which process involved in waste water convertion into drinkable water?

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  1. Precipitation

  2. Condensation

  3. Filtration

  4. Nutrient cycle

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Correct Option: C

Which parameter is very important in sewage treatment?

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  1. Temperature

  2. Chemical

  3. Decomposition

  4. All of them

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Correct Option: A

Sewage consist of 99.9% of

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  1. Oxygen

  2. Nutrients

  3. Waste

  4. Water

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Correct Option: D

In a waste water treatment, plants are examples of

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  1. Natural Ecosystem

  2. Artificial Ecosystem

  3. Lotic

  4. lentic

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Correct Option: B

Primary treatment reduces solids, ranges from

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. 20-60%

  2. 10-50%

  3. 20-70%

  4. 40-60%

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Correct Option: D

Which of the following are correctly matched ? 
1. Arsenic poisoning - Black-foot disease
2. Secondary effluent treatment - Biological process 
3. Pyrolysis - 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 and 5

  2. 1, 3, 4 and 5

  3. 2, 3, 4 and 5

  4. 1, 2, 4 and 5

  5. 1, 2, 3 and 4

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Correct Option: E
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, and is thus passed on to the next higher trophic level. This phenomenon is well known for mercury and DDT. 

What involved in wastewater final treatment?

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  1. BOD

  2. Chlorination

  3. Sedimentation

  4. All of above

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Correct Option: B