What is the primary source of energy used in hydropower plants?
A Coal
B Wind
C Water
D Sunlight
Hydropower plants generate electricity by utilizing the energy from flowing or falling water. This renewable energy source is efficient and environmentally friendly, as it harnesses water’s kinetic energy to generate electricity.
Which of the following is a disadvantage of biomass energy?
A Land use
B Carbon emissions
C Inconsistent
D High cost
While biomass is a renewable energy source, it still produces carbon dioxide during combustion. However, it is considered carbon neutral because the CO2 emitted is offset by the CO2 absorbed by plants during their growth.
What is a major environmental concern with large hydropower projects?
A Noise pollution
B Air pollution
C Water pollution
D Habitat destruction
Large hydropower projects, especially those involving dams, can lead to significant habitat destruction. Flooding areas for reservoirs disrupts ecosystems, displaces wildlife, and alters the natural flow of rivers.
Which of the following is most commonly used to produce electricity from biomass?
A Geothermal
B Wind turbines
C Combustion
D Solar panels
Biomass is typically used for electricity generation through combustion, where organic materials such as wood, agricultural waste, and other plant-based materials are burned to produce steam that drives turbines.
Which renewable energy source is most commonly associated with the use of dams?
A Hydropower
B Geothermal
C Biomass
D Wind energy
Hydropower is most commonly associated with the use of dams. Dams create a reservoir where water is stored, and when released, it flows through turbines to generate electricity.
What is the function of the penstock in a hydropower plant?
A Generate electricity
B Control water flow
C Store water
D Convert mechanical energy
A penstock is a large pipe that carries water from the reservoir to the turbine in a hydropower plant. It controls the flow of water, which is directed through turbines to generate electricity.
What is the main byproduct of burning biomass for energy?
A Carbon dioxide
B Water vapor
C Nitrogen
D Oxygen
When biomass is burned to generate energy, carbon dioxide is released into the atmosphere. However, it is considered carbon neutral since the CO2 emitted is balanced by the CO2 absorbed during the growth of plants.
Which of the following is a form of hydropower generation?
A Solar energy
B Tidal power
C Run-of-river
D Wave energy
Run-of-river hydropower generation utilizes the natural flow of rivers to generate electricity without the need for large reservoirs or dams. This method has less environmental impact compared to traditional dam-based hydropower.
What is the role of a biomass boiler in energy production?
A Convert AC to DC
B Generate heat
C Store energy
D Reduce emissions
Biomass boilers burn organic materials like wood pellets or agricultural waste to produce heat. This heat can be used for residential heating or to produce steam for electricity generation.
What is the primary advantage of using hydropower as an energy source?
A Reliability
B Low efficiency
C Expensive installation
D High carbon emissions
Hydropower is highly reliable because it can generate electricity continuously as long as there is a sufficient water supply. It is not subject to the intermittency issues that affect solar or wind energy.
Which type of biomass energy system uses organic waste to produce energy?
A Wind turbines
B Gasification
C Solar panels
D Hydropower
Biomass gasification is a process where organic waste materials like wood chips or agricultural residue are heated in a low-oxygen environment to produce a gas that can be burned for energy production.
What is the primary renewable resource used in tidal energy systems?
A Geothermal heat
B Sunlight
C Ocean tides
D Wind
Tidal energy systems harness the power of ocean tides, which are caused by the gravitational pull of the moon. These systems use the movement of tides to generate electricity in coastal areas.
What type of energy storage is commonly used in hydropower systems?
A Flywheels
B Compressed air
C Batteries
D Pumped storage
Pumped storage is a type of energy storage used in hydropower systems. Water is pumped to a higher reservoir when there is excess energy and released to generate electricity when demand is high.
Which of the following is a limitation of biomass energy?
A Requires a large amount of land
B High initial cost
C Produces no emissions
D Can be produced year-round
Biomass energy requires significant land area for growing crops or plants used as fuel. This can lead to competition for land with food production and natural ecosystems.
Which renewable energy source is least affected by weather conditions?
A Biomass
B Wind energy
C Solar energy
D Hydropower
Hydropower is less affected by weather conditions compared to solar or wind energy. As long as there is a reliable water source, hydropower can generate electricity consistently, making it a stable energy source.