NPTEL Plastic Waste Management Week 6 Assignment Answers 2024

Join Our WhatsApp Group Join Now
Join Us On Telegram Join Now

NPTEL Plastic Waste Management Week 6 Assignment Answers 2024

1. Which among the following is/are correct regarding the mechanical recycling of plastics?

i. The process of recycling does not produce any toxic emissions.
ii. The toxic components and pathogens are degraded by the use of high temperatures.
iii. Mechanical recycling occurs at low operating temperatures.
iv. Increased processing cost and low-quality jobs

a. (in) & (iv)
b. (i) & (ili)
c. (i) & (iv)
d. All of the above

Answer :- For Answer Click Here 

2. Which toxic gas is released when PVC is burned?

a. Styrene
b. Benzene
c. Hydrogen chloride gas
d. Hydrogen cyanide

Answer :- For Answer Click Here 

3. Which sorting technique of plastic waste utilizes the surface charge transfer phenomenon for separation?

a. Hydro cyclones
b. Density sorting
c. Triboelectric separation
d. Heavy medium separation

Answer :- For Answer Click Here 

4. Identify the correct arrangement of plastics in ascending order of density from the following.

a. PP < LDPE < HDPE < PVC < PET
b. PP < LDPE < HDPE < PET < PVC
c. PP < PET < PVC < LDPE < HDPE
d. PP < PVC < PET < LDPE < HDPE

Answer :- 

5. Which type of plastic waste is not preferred in road construction?

a. Films (Carry bags, Cups) up to 60 microns thickness (PE, PP, PS)
b. Laminated plastic up to 60 microns
c. PVC sheet
d. Hard Foams (PS) of any thickness

Answer :- 

6.

NPTEL Plastic Waste Management Week 6 Assignment Answers 2024
Answer :- For Answer Click Here 

7. Which of the following statement(s) is/are correct regarding the incineration of plastics?

a. Incineration takes place in the absence of oxygen.
b. The combustion zone operates at a temperature below 300°C.
c. Temperature, turbulence, time, and airflow are properly designed to minimize gas
emissions.
d. Volume of waste gets increased by the incineration process

Answer :- 

8. The process by which plastics undergo molecular and structural level changes and get converted to much simpler raw material products with superior thermal properties is termed_________.

a. Mechanical recycling
b. Feedstock recycling
c. Landfilling
d. Incineration

Answer :- 

9. Which of the following is one of the major disadvantages of landfilling of plastics?

a. Cheapest and easiest management option
b. Aesthetically and environmentally acceptable solution if properly managed and
monitored.
c. Because of their low density, they consume a lot of space and energy for transportation compaction.
d. Engineered landfills are always a better option than irregular disposal and uncontrolled burning of plastic waste.

Answer :- 

10. Which of the following statements) is/are incorrect regarding the characteristics of waste plastics?

a. Plastic increases the melting point of bitumen
b. The use of plastics deteriorates the quality of flexible pavements
c. Plastics improve aggregate impact value
d. Plastic is a good binder

Answer :- For Answer Click Here 

11. State whether the following statement is True/False.
“Pyrolysis is the thermochemical degradation and decomposition of complex long-chain organic polymer molecules into units of simple short-chain compounds at temperatures greater than 300°C in the presence of atmospheric oxygen.”

a. True
b. False

Answer :- 

12. State whether the following statement is True/False.
“Conventional wastewater treatment facilities are designed to remove emerging contaminant like microplastics”

a. True
b. False

Answer :- 

13. State whether the following statement is True/False.
“Compared to bitumen roads without plastics, plastic roads are less prone to edge flow, potholes, deformations, and cracking.”

a. True
b. False

Answer :- For Answer Click Here 

14. State whether the following statement is True/False.
“Pyrolysis permits the recycling of mixed, unwashed, and soiled plastics.”

a. True
b. False

Answer :- For Answer Click Here 

15. State whether the following statement is True/False.
“Utilizing plastics in road construction enhances road strength and increases the Marshall Stability Value.”

a. True
b. False

Answer :- For Answer Click Here