Tag: solid waste management

Questions Related to solid waste management

What is an approximate percentage of dissolved solid in seawater?

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  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?

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  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

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  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?

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  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

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  1. It reduces the diseases.

  2. It increases soil fertility.

  3. Both A and B.

  4. It reduces electricity.

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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'.

Vermi-processing toilet is 

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  1. Alternative sources of energy.

  2. Alternative arrangement of sewage disposal.

  3. Alternative arrangement of sewage treatment.

  4. None of the above.

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Correct Option: B
Explanation:
An alternative arrangement of sewage disposal: To improve sanitation, low-cost onsite sewage disposal systems are being encouraged. Examples are septic tanks, chemical toilets, composting pits. Septic tanks are suitable for places where there is no sewerage system, for hospitals.

Vermi-processing toilet: A design of a toilet in which humans excreta is treated by earthworms has been tested in India. It has been found to be a novel, low water-use toilet for safe processing of human waste. The operation of the toilet is very simple and hygienic. The human excreta is completely converted to vermi cakes — a resource much needed for soil.

So, the correct answer is 'Alternative arrangement of sewage disposal.'.

In which of the following process, human excreta is completely converted to vermi cakes?

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  1. Vermicomposting

  2. Vermi-processing toilets

  3. Biogas production

  4. None of the above

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Correct Option: B
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
  • Hence Vermi-processing toilets, human excreta is completely converted vermi cakes.
  • So, the correct answer is 'Vermi-processing toilets'.

Identify the low-cost onsite sewage disposal system.

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  1. Septic tank

  2. Composting pits

  3. Chemical toilets

  4. All of the above

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Correct Option: D
Explanation:
To improve sanitation, low cost onsite sewage disposal systems are being encouraged. Examples are septic tanks, chemical toilets, composting pits. 
  • Septic tanks are suitable for places where there is no sewerage system, for hospitals, isolated buildings or a cluster of 4 to 5 houses. 
  • Some organisations offer hygienic on-site human waste disposal technology. These toilets do not require scavenging. Excreta from the toilet seats flow through covered drains into a biogas plant. The biogas produced is used as a source of energy. (Composting pits).
  • A chemical toilet collects human excreta in a holding tank and uses chemicals to minimize odors. These toilets are usually, but not always, self-contained and movable. A chemical toilet is structured around a relatively small tank, which needs to be emptied frequently.

So, the correct answer is 'All of the above'
 

The worm used in vermi-processing toilet is

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  1. Redworm.

  2. Roundworm.

  3. Flatworm.

  4. None of the above.

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Correct Option: A
Explanation:
  • Vermi-processing toilets is a design of a toilet in which humans excreta is treated by earthworms and redworms.
  • 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.
  •  Hence The worm used in the vermi-processing toilet is Redworm.
  • So, the correct answer is 'Redworm'.

Which of the following is associated with the vermi-processing toilets?

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  1. Low water use toilet

  2. Electronic toilet

  3. Kid's toilet

  4. None of the above

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Correct Option: A
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 toilets do not use water for flushing and therefore called dry toilets. 
  • Hence vermi-processing toilets are associated with Low water use toilet because they do not use water for flushing.
  • So, the correct answer is 'Low water use toilet