1. : The primary source of energy on Earth is:
(A) Wind
(B) Sun
(C) Fossil fuels
(D) Geothermal heat
2. : Fossil fuels are considered:
(A) Renewable resources
(B) Non-renewable resources
(C) Inexhaustible resources
(D) Alternative energy
3. : The major component of natural gas is:
(A) Ethane
(B) Propane
(C) Methane
(D) Butane
4. : Coal is primarily composed of:
(A) Nitrogen
(B) Carbon
(C) Hydrogen
(D) Oxygen
5. : Which fossil fuel has the highest energy content per unit mass?
(A) Coal
(B) Natural gas
(C) Oil
(D) Peat
6. : Hydropower generates electricity by using:
(A) Sunlight
(B) Moving water
(C) Nuclear fission
(D) Wind
7. : Which energy source is the cleanest form of fossil fuel?
(A) Coal
(B) Petroleum
(C) Natural gas
(D) Peat
8. : Which of the following is an example of a renewable energy resource?
(A) Oil
(B) Wind
(C) Coal
(D) Natural gas
9. : Which country is the largest producer of solar energy?
(A) USA
(B) India
(C) China
(D) Germany
10. : The process of splitting heavy atomic nuclei to release energy is called:
(A) Fusion
(B) Fission
(C) Combustion
(D) Gasification
11. : Nuclear power plants commonly use which element as fuel?
(A) Carbon
(B) Uranium-235
(C) Thorium oxide
(D) Plutonium-238
12. : The largest share of global electricity production comes from:
(A) Renewable energy
(B) Fossil fuels
(C) Nuclear energy
(D) Hydropower
13. : Biomass energy is primarily obtained from:
(A) Sunlight
(B) Organic matter
(C) Wind
(D) Ocean waves
14. : Which of the following is NOT a form of renewable energy?
(A) Geothermal
(B) Solar
(C) Oil
(D) Tidal
15. : The measure of energy produced per unit time is called:
(A) Voltage
(B) Power
(C) Current
(D) Resistance
16. : Wind turbines convert:
(A) Solar radiation into heat
(B) Kinetic energy of wind into electricity
(C) Nuclear energy into heat
(D) Biomass into liquid fuels
17. : Which renewable energy is derived from Earth’s internal heat?
(A) Geothermal energy
(B) Solar energy
(C) Wind energy
(D) Biomass energy
18. : The largest hydropower dam in the world is:
(A) Hoover Dam (USA)
(B) Itaipu Dam (Brazil-Paraguay)
(C) Three Gorges Dam (China)
(D) Tarbela Dam (Pakistan)
19. : Energy obtained from ocean tides is caused by:
(A) Earth’s rotation
(B) Gravitational pull of the Moon and Sun
(C) Ocean currents
(D) Solar heating
20. : Which of the following is a secondary energy source?
(A) Natural gas
(B) Oil
(C) Electricity
(D) Coal
21. : The energy efficiency of a system is defined as:
(A) Input energy / Output energy × 100
(B) Output energy / Input energy × 100
(C) Input – Output energy
(D) Energy lost in transmission
22. : Which of the following fuels emits the highest amount of CO₂ per unit of energy produced?
(A) Coal
(B) Oil
(C) Natural gas
(D) Biomass
23. : Which renewable energy technology is most suitable for remote villages?
(A) Nuclear power
(B) Solar photovoltaic systems
(C) Coal power plants
(D) Oil refineries
24. : Hydrogen fuel is considered clean because:
(A) It releases only carbon dioxide when burned
(B) It produces only water as a by-product
(C) It is produced from coal
(D) It requires no energy to produce
25. : The unit of electrical energy commonly used in households is:
(A) Watt
(B) Joule
(C) Kilowatt-hour (kWh)
(D) Newton