Which of the following is considered a non-renewable energy source?
A Biomass
B Coal
C Wind
D Solar
Coal is a fossil fuel that is considered non-renewable. Once used, it cannot be replaced within a human lifespan, unlike renewable resources like wind, solar, and biomass.
What is the primary material used in the construction of solar panels?
A Silicon
B Aluminum
C Copper
D Steel
Solar panels primarily use silicon to make photovoltaic cells, which convert sunlight into electricity. Silicon is chosen because of its ability to efficiently convert sunlight into electrical energy.
What does a wind turbine convert into electricity?
A Heat energy
B Solar radiation
C Water pressure
D Wind’s kinetic energy
Wind turbines convert the kinetic energy of wind into mechanical energy, which is then used to produce electricity. This process is what makes wind a valuable renewable energy source.
Which of these renewable energy sources is most reliable in all weather conditions?
A Biomass
B Solar energy
C Hydropower
D Wind energy
Hydropower is the most reliable in various weather conditions because it relies on flowing or falling water, which remains consistent regardless of the weather. It can generate electricity continuously.
What is the purpose of a grid-tied renewable energy system?
A Avoid energy waste
B Connect to the national grid
C Store energy
D Reduce energy production
A grid-tied renewable energy system is connected to the national electricity grid. It allows excess energy to be sent back to the grid, which helps reduce energy costs and promote renewable energy use.
Which of the following is a major challenge with solar energy?
A Low cost
B Pollution
C Intermittency
D High efficiency
Solar energy is intermittent because it can only generate power when sunlight is available, usually during the day. This makes it unreliable without energy storage or supplementary systems.
What is a microgrid in renewable energy?
A A small, local grid
B A large grid
C A solar farm
D A non-electricity system
A microgrid is a small, localized energy system that can operate independently from the main grid. It often uses renewable energy sources and can provide power during grid outages.
What is one of the advantages of wind energy over solar energy?
A Consistent availability
B No maintenance required
C No environmental impact
D Higher efficiency
Wind energy can be more consistent than solar energy because wind can blow at any time, day or night. This makes wind a more reliable energy source in many areas, especially coastal regions.
Which renewable energy source uses organic materials for fuel?
A Hydropower
B Wind
C Biomass
D Geothermal
Biomass energy is produced by burning organic materials like wood, crops, and animal waste. It is renewable because new plants can be grown to replace the materials used for fuel.
What is a key component of most energy storage systems in renewable energy?
A Hydroelectric dams
B Batteries
C Solar panels
D Wind turbines
Batteries are key in energy storage systems, allowing excess energy generated by renewable sources like solar or wind to be stored and used when generation is low or demand is high.
What does the term “distributed generation” refer to?
A Government energy policies
B Large-scale power plants
C Energy produced near the point of use
D Energy storage
Distributed generation refers to producing electricity close to where it is used, such as from solar panels or small wind turbines. It helps reduce transmission losses and improve energy security.
What is the role of inverters in solar energy systems?
A Convert DC to AC
B Measure sunlight
C Charge batteries
D Store electricity
Inverters in solar energy systems convert the direct current (DC) electricity produced by solar panels into alternating current (AC), which is the form of electricity used by most appliances.
What is one of the environmental impacts of hydropower?
A Increased emissions
B Waste generation
C Air pollution
D Habitat destruction
Hydropower can lead to habitat destruction, especially in ecosystems where dams are built. The flooding of land can displace wildlife and disrupt local ecosystems, which is an environmental concern.
Which renewable energy source uses the Earth’s internal heat?
A Wind
B Biomass
C Geothermal
D Solar
Geothermal energy comes from the heat stored inside the Earth. This energy can be harnessed for electricity generation or direct heating by tapping into underground reservoirs of hot water or steam.
What is the main challenge with energy storage in renewable energy systems?
A High efficiency
B High cost
C Lack of energy
D Low demand
The main challenge with energy storage in renewable systems is the high cost of batteries and storage systems. While essential for balancing intermittent energy sources, the cost can limit widespread adoption.