NPTEL Air Pollution and Control Assignment 8 Answers 2023

Hello Learners, In this Post, you will find NPTEL Air Pollution and Control Assignment 8 Week 8 Answers 2023. All the Answers are provided below to help the students as a reference don’t straight away look for the solutions.

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NPTEL Air Pollution and Control Assignment 8 Answers 2023:

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Q.1. In the case study entitled “Indoor Air Quality in Nursery Buildings”; which of the following methods was NOT included in the study for improvement of indoor air quality.

• Installation of an air purifier (AP)
• Change of building materials (BM)
• Installation of new ventilation (NV)
• Ultraviolet germicidal irradiation (UVGI)

Q.2. In the case study entitled “Indoor Air Quality in Nursery Buildings”; which of the following methods was most effective way to reduce the concentration of pollutants.

• Installation of an air purifier (AP)
• Change of building materials (BM)
• Installation of new ventilation (NV)
• Ultraviolet germicidal irradiation (UVGI)

Q.3. Tropospheric or ground-level ozone is not emitted directly into the air but is created by ____________ reactions of its precursors in the presence of sunlight. 

• Hydrolysis
• Combustion
• Photochemical
• Convection

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Q.4. Which of the following international treaties significantly decreased the Ozone-depleting substances (ODSs) and was effective in healing the damaged ozone layer? 

• Montreal protocol
• Paris Agreement
• Kyoto protocol
• Helsinki Protocol

Q.5. Which of the following GHGs is the most important long-lived “forcing” of climate change?

• CH₄
• Ozone
• CO₂
• Fluroinated gases

Q.6. Methane (CH₄), which is considered as the second most important anthropogenic greenhouse gas, is mainly emitted by: 

• Automobiles
• Power plants
• Industrial emissions
• Agriculture and waste

Q.7. Long-term shift in temperature and weather patterns is referred as _______. 

• Global warming
• Climate change
• Heatwave
• Heat island

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Q.8. The urban centre that is warmer than the surrounding less populated area is called as _______ 

• Cold island
• Global warming potential
• Heat island
• Climate change

Q.9. Acid rain results when ________ and ________ are emitted into the atmosphere and react with atmospheric moisture and oxygen to form acids.

• SO₂ and NO_X
• NH₃ and VOCs
• VOCsand CO
• NH₃ and CO

Q.10. Acid rain leaches ________from the soil, which results in toxic effect to the root tip leading to root stunting accompanied by reduced water and nutrient uptake.

• Aluminum (Al)
• Mercury (Hg)
• Zinc (Zn)
• Chromium (Cr)

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About NPTEL Air Pollution and Control Course:

The objective of the course is to impart the knowledge and understanding of causes and effects of air pollution and their controlling mechanisms. The course will provide a deeper understanding of air pollutants, pollution inventory and modelling. The course also imparts knowledge on the impacts of air pollution on different aspects such as policy, human health and various contemporary technological innovation for betterment of air quality.

Course Outcome:

• Week 1 : Air Pollution: Introduction and Impacts of air pollution on human health, vegetation, animals, building materials, structures, and atmosphere, soil and water bodies.
• Week 2 : Sources, classification and formation/transformation of air pollutants: Meteorology and Atmospheric Stability.
• Week 3 : Lapse Rate, Plume Behaviour, and Air Quality Monitoring, Air Quality Index (AQI)
• Week 4 : Air Quality Modelling, Gaussian dispersion models: point, line and area source models
• Week 5 : Emissions Inventory: Transport, Industrial, Agricultural, Residential and Commercial sectors
• Week 6 : Application of Remote sensing/Satellite based data in emission inventory, Source apportionment using receptor modelling.
• Week 7 : Indoor air pollution: sources, types and health impacts. Sampling, assessment and evaluation of Indoor air quality.
• Week 8 : Global and regional environmental issues of air pollution: Ozone depletion, Climate change, Global warming, Acid rain.
• Week 9 : Air pollution control devices, equipment and their design.
• Week 10 :  Air pollution emission standards, National and international policies, acts, rules and regulations.
• Week 11 : Emerging technologies and strategies to mitigate air pollution, Current challenges and way forward.
• Week 12 : Lab-based measurements of air pollutants.

CRITERIA TO GET A CERTIFICATE:

Average assignment score = 25% of average of best 8 assignments out of the total 12 assignments given in the course.
Exam score = 75% of the proctored certification exam score out of 100

Final score = Average assignment score + Exam score

YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75. If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.

If you have not registered for exam kindly register Through https://examform.nptel.ac.in/