NPTEL Introduction to Environmental Engineering and ScienceASS10

Which is the correct order of waste management strategies from the most favored to least favored option?

• Reduce – Reuse – Recycle – Energy recovery – Disposal

• Reuse – Reduce – Recycle – Energy recovery – Disposal

• Reduce – Reuse – Energy recovery – Disposal – Recycle

• Energy recovery – Disposal – Reduce – Reuse – Recycle

Identify the advantages of municipal solid waste recycling from the following;

• a. Require stable market

• b. Save precious resources

• c. Poorly managed sites can result in Superfund sites

• d. Improve the efficiency of incinerators and composting facilities

State whether the following statement is True/False. ‘During the acid-forming phase of waste in landfills, the production of volatile fatty acids (VFAs) results in low pH conditions.”

• TRue

• FAlse

What materials can be used to make the liner of a sanitary landfill?

• a. Compacted clay

• b. Sand

• c. Composite of compacted clay and geomembrane

• d. None of the above

Typical solid waste generation in India varies between ____________.

• a. 0.5-0.9 kg/p/day

• b. 0.3-0.6 kg/p/day

• c. 1.5-1.8 kg/p/day

• d. 0.1-0.2 kg/p/day

Which methodology is used to assess the environmental impact associated with all stages of a product’s life cycle?

• a. Material flow analysis

• b. Life cycle assessment

• c. Sensitivity analysis

• d. Risk assessment

How can the net calorific value of a waste sample be determined?

• a. Gas chromatography

• b. Bomb calorimeter

• c. Dulong formula

• d. Both b & c

Which of the following gases is not typically found in the composition of landfill gas?

• a. Methane

• b. Carbon dioxide

• c. Hydrogen

• d. Hydrogen sulfide

Which among the following factors affects the solid waste composition of a region?

• a. Geographic location

• b. Collection frequency

• c. Public attitude

• d. All the above

The liquid formed from the degradation of organic fraction of municipal solid waste in the landfill is termed as ___________.

• a. Leachate

• b. Hydrolysate

• c. Digestate

• d. Condensate