Tag: basics of water pollution

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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

Which of the following filter is used for filtration of wastewater?

  1. Sand filter

  2. Grit filter

  3. Cloth

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In wastewater treatment, both sand filters and grit chambers (or grit filters) are standard components used to remove solid particles and debris from the influent.

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

Rainwater can be preserved by building small reservoirs, contour building and

  1. wall

  2. roof

  3. dams

  4. house
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Rainwater harvesting involves capturing and storing water using structures like dams, contour bunds, and reservoirs to prevent runoff and increase groundwater recharge.

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

When harmful substances get mixed with water it becomes

  1. polluted

  2. muddy

  3. pure

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

Water pollution is defined as the contamination of water bodies by harmful substances, which makes the water unsafe or unsuitable for its intended use.

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

Sewage water carry ______ that spread diseases.

  1. plants

  2. animals

  3. micro organisms

  4. dirt
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sewage contains organic waste and various pathogens, including bacteria, viruses, and protozoa, which are microorganisms responsible for spreading water-borne diseases.

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

Which of the following is not a water borne disease?

  1. Diarrhoea

  2. Typhoid

  3. Hepatitis

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

Diarrhea, typhoid, and hepatitis are classic water-borne diseases. Conjunctivitis is an eye infection typically spread by direct contact or contaminated surfaces, not primarily through drinking water.

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

Waste water from industries contain

  1. microbes

  2. poisonous substances

  3. oil

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

Industrial wastewater often contains heavy metals, toxic chemicals, and other hazardous substances that are harmful to the environment and human health.

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

When water is passed through filter beds of sand and gravel to remove smaller particles of dust is called

  1. oxygenation

  2. chlorination

  3. sedimentation

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

Filtration is the physical process of passing water through layers of sand and gravel to remove suspended solids and smaller particulate matter.

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

Water pollution is mainly caused by

  1. earthquake

  2. human activity

  3. forest fire

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

While natural events can affect water quality, the vast majority of water pollution is caused by human activities such as industrial discharge, agricultural runoff, and improper sewage disposal.

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

Disease caused by the use of untreated water is

  1. Tuberculosis

  2. Typhoid

  3. Cholera

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Tuberculosis is caused due to Mycobacterium tuberculosis. It is caused due to the infection of lungs due to inhaling the contaminated air.
Typhoid is mainly caused due to bacteria Salmonella typhimurium. The intestine and bloodstream of humans is the main source of proliferation of bacteria. The direct contact with the untreated water containing the feces of an infected person is the main cause of the spread of the disease. 
Cholera is a disease which causes severe dehydration due to infection of the bacterium called Vibrio cholerae. Consumption of contaminated food and water mainly causes the disease. 
So, the correct answer is option D.