Tag: personal and public cleanliness

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Questions Related to personal and public cleanliness

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.
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 chemical is used to disinfect water

  1. Chlorine

  2. washing soda

  3. coal

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

Chlorine is the most common chemical used for water disinfection in treatment plants due to its effectiveness in killing pathogenic bacteria.

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 need to be done before chemical treatment and biological treatment?

  1. Screening only

  2. Filteration only

  3. Boiling of water

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

Screening and filtration are preliminary physical treatment steps used to remove large debris and suspended solids before the water undergoes more intensive chemical or biological treatment.

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 can cause 

  1. climate change

  2. deforestation

  3. diseases

  4. none of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Water pollution introduces pathogens and toxins into the water supply, which are direct causes of various diseases like cholera, typhoid, and dysentery.

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

In a filtration plant, water is filtered using layers of 

  1. sand

  2. oil

  3. sand and clay

  4. sand, fine gravel and medium gravel
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A standard slow or rapid sand filter in a water treatment plant uses graded layers of sand and gravel to effectively trap and remove impurities from the 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

Water before treatment contains

  1. Nitrogen

  2. Oxygen

  3. Phosphorus

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

Untreated water often contains nutrients like nitrogen and phosphorus, which are common pollutants from agricultural runoff and sewage that can lead to eutrophication.

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/are useful ways of utilizing waste water?

  1. Certain pollutants in sewage water can become fertilizer for various crops.

  2. Waste water can be used for recharging the ground water.

  3. Waste water can be used for irrigation.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Waste water can be used for multiple purposes as mentioned below-
(a) For recharging the groundwater.
(b) It can be used for irrigation.
(c) Treated municipal water can be used for washing cars and watering the gardens.
(c) Certain pollutants in sewage water can be used as fertilizers for various crops.
Therefore, the correct answer is option D.
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 is first stage of waste treatment plant?

  1. Preliminary Treatment

  2. Primary Treatment

  3. Secondary Treatment

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

Preliminary treatment is the first stage of a wastewater treatment plant, involving processes like screening and grit removal to protect downstream equipment.