Tag: preparation of compost

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Questions Related to preparation of compost

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

Which of the following groups contains only easily biodegradable items?

  1. Grass, flower and leather

  2. Grass, wood and plastic

  3. Fruits, peel cake and lime juice

  4. Cake, wood and grass
Reveal answer Fill a bubble to check yourself
A,C,D Correct answer
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. 
Multiple choice evs garbage in, garbage out preparation of compost sewage disposal solid waste management

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.

  1. iii and iv only

  2. ii and iv only

  3. ii, iii and daily

  4. i, ii, iii and D
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.
Multiple choice evs garbage in, garbage out preparation of compost sewage disposal solid waste management

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?

  1. Sludge burning

  2. Pyrolysis

  3. Incineration

  4. Source reduction
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

Which solid waste disposal method is endothermal process?

  1. Compositing

  2. Pulverization

  3. Incineration

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

Pyrolysis is an endothermic process, meaning it absorbs heat from the surroundings to break down organic materials in the absence of oxygen. Incineration, by contrast, is exothermic and releases heat. Composting and pulverization are physical or biological processes that do not involve thermal decomposition.

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

Vermi-processing toilet is beneficial because

  1. It reduces the diseases.

  2. It increases soil fertility.

  3. Both A and B.

  4. It reduces electricity.
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.