Sustainable Energy Technology Nptel Week 2 Answers
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Sustainable Energy Technology Nptel Week 2 Answers (July-Dec 2025)
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Question 1. Which combination contains in Hard coal?
a) Moisture content and water
b) Sub-bituminous coal and lignite coal
c) Bituminous and lignite coal
d) Bituminous and anthracite
Question 2. Which of the options given below regarding SMOG is INCORRECT?
a) NO₂ and O₃ are the main constituents
b) O₃ is pale bluish in colour and gives SMOG a bluish tinge
c) NO₂ reacts with the presence of O₂ to give NO and O₃
d) NO₂ is a colourless gas with a sharp pungent biting odour
Question 3. Which gas create a brown haze of SMOG?
a) NO
b) O₃
c) NO and O₃
d) NO₂
Question 4. Which among these produce more greenhouse gas emission?
a) Electricity and heat production
b) Transportation
c) Industry
d) Building
Question 5. Which pollutant among these cause impact on central nervous system?
a) NO₂
b) O₃
c) SO₂
d) PM
Question 6. Which one of these is a non-renewable energy source?
a) Wind
b) Biomass
c) Gas
d) Tidal
Question 7. A 300 MW coal power plant runs on hard coal. Using the emission values of hard coal listed in the class lecture, evaluate the amount of NOx emissions in tonnes that such a power plant will generate in a year ______. Note that a year is 360 days, answer in tonnes/year?
Question 8. A 500MW Coal power plant has efficiency 30% burns a coal with heating value of 30 MJ/Kg. The amount of coal supply burnt per day is _____ tons per day
Question 9. Photochemical reaction in SMOG is a source of O₃.
a) True
b) False
Question 10. NO₂ is a pale blue gas.
a) True
b) False
Question 11. The global warming is uniform throughout the world.
a) True
b) False
Question 12. SO₂ (Sulphur Dioxide) emissions tends to increase the global mean temperature.
a) True
b) False
Question 13. Methane (CH₄) is a greenhouse gas.
a) True
b) False
Question 14. Brown coal has low carbon content than hard coal.
a) True
b) False
Question 15. Suspended micron sized particles of dust and soot called PM can cause respiratory diseases.
a) True
b) False
Question 16. Severe heat wave events have intensified due to human-induced climate change.
a) True
b) False
These are Sustainable Energy Technology Nptel Week 2 Answers