CEA Renewable Energy Technologies — Questions and Answers
Question 1: What type of energy is harnessed by solar panels?
- Wind energy.
- Solar energy (Correct answer)
- Geothermal energy.
- Hydro energy.
Correct answer: Solar energy
Solar panels, specifically photovoltaic (PV) panels, are designed to convert sunlight directly into electricity. They harness solar energy, which is the radiant light and heat from the sun. This process allows for the generation of clean electricity without consuming fossil fuels.
Question 2: Which renewable technology uses wind to generate electricity?
- Biomass.
- Wind turbines (Correct answer)
- Hydropower.
- Solar thermal.
Correct answer: Wind turbines
Wind turbines are mechanical devices specifically engineered to capture the kinetic energy of wind. The wind causes the blades to rotate, which in turn drives a generator to produce electricity. This makes wind turbines the primary technology for converting wind into usable electrical power.
Question 3: What is geothermal energy derived from?
- Solar radiation.
- Earth’s internal heat (Correct answer)
- Ocean waves.
- Biomass.
Correct answer: Earth’s internal heat
Geothermal energy originates from the heat stored within the Earth's core and mantle. This internal heat is continuously produced by the slow decay of radioactive isotopes in the Earth's rocks. It can be harnessed for electricity generation or direct heating and cooling applications.
Question 4: What does biomass energy use as a source?
- Fossil fuels.
- Organic materials (Correct answer)
- Solar panels.
- Wind turbines.
Correct answer: Organic materials
Biomass energy is derived from organic matter, which includes plant and animal waste, agricultural residues, and dedicated energy crops. This material contains stored chemical energy from the sun, which can be converted into heat, electricity, or biofuels through various processes like combustion or anaerobic digestion.
Question 5: Which renewable energy source is considered intermittent?
- Geothermal.
- Intermittent energy like solar (Correct answer)
- Biomass.
- Hydropower.
Correct answer: Intermittent energy like solar
Intermittent renewable energy sources are those that are not continuously available and depend on natural phenomena that fluctuate. Solar energy, for example, is only available when the sun is shining, and its output varies with cloud cover and time of day. This variability makes it an intermittent source, requiring energy storage or backup systems.
Question 6: What technology stores energy for later use?
- Energy storage (Correct answer)
- Energy generation.
- Energy transmission.
- Energy distribution.
Correct answer: Energy storage
Energy storage technologies, such as batteries, pumped hydro, or thermal storage, are specifically designed to capture and hold energy produced at one time for use at a later time. This capability is crucial for balancing supply and demand, especially with intermittent renewable energy sources, and improving grid stability and reliability.
Question 7: Which country is the largest producer of wind energy?
- USA.
- China (Correct answer)
- Germany.
- India.
Correct answer: China
China has made substantial investments in renewable energy infrastructure and has the largest installed capacity for wind power globally. Its vast land area, favorable wind resources, and strong government support have enabled it to become the leading producer of wind energy worldwide.
Question 8: What is the benefit of using renewable energy technologies?
- Increase pollution.
- Reduce emissions and fossil fuel use (Correct answer)
- Increase costs.
- Decrease energy reliability.
Correct answer: Reduce emissions and fossil fuel use
The primary benefit of using renewable energy technologies is the significant reduction in greenhouse gas emissions and air pollutants compared to fossil fuels. By relying on naturally replenishing sources like solar, wind, and hydro, these technologies decrease dependence on finite and environmentally damaging fossil fuels, contributing to a cleaner environment.
Question 9: Which renewable energy is generated from ocean tides?
- Wave energy.
- Tidal energy (Correct answer)
- Solar energy.
- Geothermal energy.
Correct answer: Tidal energy
Tidal energy is a specific form of hydropower that harnesses the kinetic energy of ocean tides, which are predictable and powerful movements of water. Specialized barrages or turbines are used to convert the energy from the ebb and flow of tides into electricity. This distinguishes it from wave energy, which captures energy from surface waves.
CEA Renewable Energy Technologies
What type of energy is harnessed by solar panels?