Tag: sewage disposal

Questions Related to sewage disposal

Which of the following groups contains only easily biodegradable items?

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. Grass, flower and leather

  2. Grass, wood and plastic

  3. Fruits, peel cake and lime juice

  4. Cake, wood and grass

Show answer
Correct Option: A,C,D
Explanation:
Biodegradable items can be degraded into simpler molecules by the action of microbes. These include grass, flowers, leather, wood, fruit peels, cake, lime juice etc. All these items can be decomposed by microorganisms.
Plastic is non-biodegradable as it can't be decomposed by the action of microorganisms and thus, it remains in nature for a long period of time.
So, the correct answer is option A, C and D. 

Safai karamcharis collect the garbage in trucks and take it to a low lying open area. This area is called as

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. Dust bin

  2. Garbage

  3. Landfill

  4. Waste

Show answer
Correct Option: C
Explanation:

Safai karamcharis collect the garbage in trucks and take it to a low lying open area, called a landfill.

So, the correct answer is 'landfill'

Which of the following action or activity may causes undesirable effect to our environment?
i)  Catching and keeping animals such as bird and cats at home.
ii) Feeding birds such as pigeon and crows in our neighbourhood.
iii) Burning unwanted plastic product in our neighbourhood o reduce non - biodegradable rubbish.
iv) Dumping biodegradable refuse such as fruit skins and bones in our sewage to make the water nutrients rich for healthy growth of flowering plants.

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. iii and iv only

  2. ii and iv only

  3. ii, iii and daily

  4. i, ii, iii and D

Show answer
Correct Option: A
Explanation:
iii) Burning unwanted plastic product in our neighbourhood or reduce non-biodegradable rubbish.
  • Burning of plastic causes air pollution due to the release of nitrogen oxides, sulphur dioxides and other particulate matter into the atmosphere.
iv) Dumping biodegradable refuse such as fruit skins and bones in our sewage to make the water nutrients rich for healthy growth of flowering plants.
  • The above activity causes an undesirable effect on the environment.
  • So, the correct answer is 'iii and iv only'.

Which of the following is the method of controlled aerobic combustion of wastes inside chambers at temperatures as high as 900$^0$-1300$^0$C?

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. Sludge burning

  2. Pyrolysis

  3. Incineration

  4. Source reduction

Show answer
Correct Option: C
Explanation:

Incineration is the process of oxidation of combustible substance present in the waste (which is heterogeneous material like minerals, metals etc.). The waste is treated to reduce its volume, convert that into useful form of energy. At a temperature of 900 to 1300$^0$ C, the organic substances in the waste will burn and release energy. So, the correct answer is 'Incineration'.

Combustible and non combustible solid waste, excluding food waste, known as

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. Rubbish

  2. Garbage

  3. Solid material

  4. Animal Waste

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Correct Option: A

What is an approximate percentage of dissolved solid in seawater?

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. 4.50%

  2. 3.50%

  3. 1.50%

  4. 2.50%

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Correct Option: B

Which solid waste disposal method is endothermal process?

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. Compositing

  2. Pulverization

  3. Incineration

  4. Pyrolysis

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Correct Option: D

The combustion of waste in the absence of Oxygen is called

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. Haemolysis

  2. Pyrolysis

  3. Hydrolysis

  4. None

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Correct Option: B

In which compositing method coarse inert matter is firstly removed?

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. Open window Compositing

  2. Machanical Compositing

  3. Compositing by tranching

  4. Pulverization

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Correct Option: A

Vermi-processing toilet is beneficial because

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. It reduces the diseases.

  2. It increases soil fertility.

  3. Both A and B.

  4. It reduces electricity.

Show answer
Correct Option: C
Explanation:
  • Vermi-processing toilets is a design of a toilet in which humans excreta is treated by earthworms.
  • In this process, human excreta is completely converted to cake like structures called vermi cakes by earthworms. Vermi cakes are used mostly in the soil as manure and fertilizers.
  • The vermi-processing toilet is beneficial because It reduces diseases and increases soil fertility.
  • So, the correct answer is 'Both A and B'.