Tag: solid waste management

Questions Related to solid waste management

The human excreta can be used for the production of ________________.

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

  1. Vermi cakes for fertilizer

  2. Vermi cakes as manure

  3. Vermi cakes as animal food

  4. Both A and B

Show answer
Correct Option: D
Explanation:
Excreta of the humans can be used for making vermicompost using earthworms. Vermi cakes are formed after composting of human excreta. It contains substances like phosphorous, potassium and nitrogen which are major components of fertilizers. Vermi cakes are also used as manure which is an organic matte. It is used as organic fertilizer. 
Thus, the correct answer is option D.

Pyrolysis of wood occurs in

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

  1. Presence of air

  2. Absence of air

  3. Limited supply of air

  4. Both B and C

Show answer
Correct Option: B
Explanation:

Pyrolysis is the term used for thermal decomposition of materials at high temperature in an inert atmosphere i.e. absence of air.

So, the correct answer is 'Absence of air'

Pyrolysis of wood occurs in

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

  1. Presence of air

  2. Absence of air

  3. Limited supply of air

  4. Both B and C

Show answer
Correct Option: D

Enzymatic filters are used for removing

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

  1. Nitrogen pollutants

  2. Chloride pollutants

  3. Hydrocarbons

  4. Lead

Show answer
Correct Option: C
Explanation:
Hydrocarbon Removal filters are designed to remove hydrocarbons and sediment contaminants from groundwater accumulation in bunded areas, outfalls or as part of any pollution preventative drainage solution on your site, where hydrocarbon risk entering the environment.
The contaminants are absorbed by the smart filtration technology which bond with the hydrocarbon molecules to efficiently encapsulate and solidify hydrocarbons internally in the cartridge.
This allows filtered groundwater to pass unimpeded through the filter.
So the correct answer is 'Hydrocarbons'.

Composting is carried out from

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

  1. Sewage sludge

  2. Rubbish

  3. Garbage and sewage sludge

  4. Industrial wastes

Show answer
Correct Option: C
Explanation:
Compost is the nutrient rich organic matter that is formed by the decomposition of plant and animal material. The process of making compost is called composting. The microbes break down the organic matter into humus that contains nutrients beneficial to plants. Compost is used to increase the fertility of the soil and aid the growth of plants. Compost can be made from various raw materials that are biodegradable. This include vegetable peels, kitchen waste, garbage and even sewage sludge too as it contains the bacteria that carry out the decomposition of organic matter.
So, the correct answer is 'Garbage and sewage sludge'.

Pyrolysis of wood yields

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

  1. Alcohol

  2. Charcoal

  3. Charcoal and wood gas

  4. Charcoal, wood gas, tar and oil

Show answer
Correct Option: D
Explanation:
Pyrolysis is the thermal composition of a material by heating it at a very high temperature. Pyrolysis of wood occurs at a temperature of  200–300 °C. Many products are formed from pyrolysis of wood like charcoal, tar, wood gas and wood oil. Charcoal is the residue left after burning of wood. It is rich in carbon. Wood gas and wood oil are used as fuels. Tar is a black liquid and used as filler in roads.
So, the correct answer is 'Charcoal, wood gas, tar and oil'.

Pyroligneous acid produced during pyrolysis of wood is

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

  1. Creosote

  2. Acetic acid

  3. Methyl alcohol

  4. Ammonia

Show answer
Correct Option: B

The buildings which do not have a sewage system can _____________.

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

  1. Construct drainage tanks

  2. Construct septic tanks

  3. Construct sewage water bodies

  4. Construct septic canals

Show answer
Correct Option: B
Explanation:

Septic tanks are underground tanks in which sewage is collected and allowed to decompose with the use of bacteria. Drainage tanks are used to remove water. Sewage pollutes the water bodies when directly discharged into water bodies like river. Septic canal is a tubular passageway for the disposal for sewage.

Thus, the correct answer is option B.

In compositing, volume of solid waste is

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

  1. Reduced

  2. Enhanced

  3. Burnt

  4. Removed

Show answer
Correct Option: A

Pollution due to sewage can be reduced by 

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

  1. Creating separate chemical toilets.

  2. Constructing septic tanks.

  3. Letting off drainage in rivers.

  4. Both A and B.

Show answer
Correct Option: D
Explanation:
A very large fraction of our people defecates in the open, on dry riverbeds, on railway tracks, near fields and many a time directly in water. Untreated human excreta is a health hazard. It may cause water pollution and soil pollution. Both the surface water and groundwater get polluted.
  • A septic tank is an underground chamber made of concrete, fiberglass or plastic through which domestic wastewater flows for basic treatment. Settling and anaerobic processes reduce solids and organics, but the treatment efficiency is only moderate. Septic tank systems are a type of simple onsite sewage facility.
  • Chemical toilet is a toilet that is not connected to a sewage system but has a compartment in which waste is treated with chemicals for temporary storage.
  • Letting off drainage in rivers will cause water pollution.
So, the correct answer is 'Both A and B'