Sustainable Energy Technology Nptel Week 1 Answers
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Sustainable Energy Technology Nptel Week 1 Answers (July-Dec 2025)
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Question 1. The burning of coal in a furnace involves which type of energy transformation?
a) Electrical Energy to Mechanical Energy
b) Thermal Energy to Mechanical Energy
c) Chemical Energy to Thermal Energy
d) Mechanical Energy to Chemical Energy
Question 2. Which of the following best describes energy?
a) A material that can be stored in batteries
b) A conserved property of physical systems
c) A type of particle that flows in circuits
d) A form of chemical only found in fuels
Question 3. What is the SI unit of energy?
a) Newton
b) Pascal
c) Joule
d) Watt
Question 4. What is the SI unit of temperature used in thermal energy calculations?
a) Celsius (°C)
b) Fahrenheit (°F)
c) Kelvin (K)
d) Joule (J)
Question 5. A power plant burns 700 Toe of coal on a given day. 35% of the energy contained in coal is converted to electrical energy. How much electrical energy is generated by this power plant over a day in MW-hr unit? (Choose the number closest to your calculation).
a) 2855 MW-hr
b) 22,000 MW-hr
c) 32,000 MW-hr
d) 40,000 MW-hr
These are Sustainable Energy Technology Nptel Week 1 Answers
Question 6. Heat needed to raise 1 lb of water by 1 degree Fahrenheit?
a) Joule
b) BTU
c) Quad
d) Therm
Question 7. Energy can exist in which of the following forms? (Select all that apply)
a) Thermal energy
b) Mechanical work
c) Electrical energy
d) Magnetic monopoles
Question 8. In the solar radiation spectrum, where does the maximum spectral irradiance fall?
a) Ultraviolet region
b) Visible region
c) Infrared region
d) Radio wave region
Question 9. What does energy technology enable us to do?
a) Store energy in atoms
b) Use gravity to produce energy
c) Harvest and convert natural sources of energy
d) Increase kinetic energy of particles
Question 10. The fastest growing regions with regard to primary energy supply over the last 50 years have been
a) OECD countries
b) African countries
c) China and non-OECD Asia
d) Non-OECD Europe and Eurasia
Question 11. How much TNT explodes to give 1 megaton (Mt) energy?
a) 1 Billion
b) 10 Kg
c) 1000 kg
d) 1 million tons
These are Sustainable Energy Technology Nptel Week 1 Answers
Question 12. Which of the following has the shortest wavelength in the electromagnetic spectrum?
a) Infrared
b) X-rays
c) Microwaves
d) Gamma rays
Question 13. The energy released by burning 1000 kg of crude oil is called?
a) Foot-pound
b) Erg
c) Toe
d) Therm
Question 14. Specific Heat (C=J/kg.K) is the thermal energy (heat) required to increase the temperature of 1 kg of the substance by 1 degree Kelvin.
a) True
b) False
Question 15. India is largely dependent on external imports to meet its primary energy demands.
a) True
b) False
Question 16. The human development index of a nation will always increase linearly as the energy consumption increases for the country.
a) True
b) False
Question 17. Tritium and Helium are fused in the nuclear fusion reaction.
a) True
b) False
These are Sustainable Energy Technology Nptel Week 1 Answers
Question 18. Modern renewables like solar and wind still provide only a small fraction of the energy consumed by the world.
a) True
b) False
Question 19. In electromagnetic radiation, photons carry the energy.
a) True
b) False
Question 20. Large hydro power stations are sustainable in nature.
a) True
b) False
These are Sustainable Energy Technology Nptel Week 1 Answers
