Photo AI
List the FOUR main parts of a wind turbine - NSC Agricultural Technology - Question 3 - 2020 - Paper 1
Question 3
List the FOUR main parts of a wind turbine. 3.2 State THREE factors that determine the efficiency of an electrical solar panel. 3.3 Geothermal energy is the heat e... show full transcript
Worked Solution & Example Answer:List the FOUR main parts of a wind turbine - NSC Agricultural Technology - Question 3 - 2020 - Paper 1
Step 1
List the FOUR main parts of a wind turbine.
Answer
- Rotor: The component that converts wind energy into rotational energy.
- Gearbox: Increases the rotation speed for better electricity generation.
- Generator: Converts mechanical energy from the rotor into electrical energy.
- Blades: Designed to capture wind energy effectively.
Step 2
State THREE factors that determine the efficiency of an electrical solar panel.
Answer
- Angle of Installation: The angle at which panels are installed can impact sunlight absorption.
- Number of Solar Panels: More panels can lead to greater efficiency in energy production.
- Location: Presence of obstruction like buildings or trees can block sun exposure.
Step 3
Briefly describe the procedure that must be followed to harness geothermal energy and transform it into electricity.
Answer
- Drilling: Deep holes are drilled to reach a geothermal hotspot.
- Steam Extraction: A pipe is placed to allow steam to rise to the surface.
- Turbine Activation: The steam is channeled to a turbine, which generates electricity.
- Cooling Process: Cooled water is pumped down to repeat the process.
Step 4
Step 5
State FOUR disadvantages of bio-fuel.
Answer
- Low Energy Output: Biofuels generally produce less energy than fossil fuels.
- High Production Costs: The cost involved in producing biofuels is often very high.
- Impact on Food Supply: Using food crops for fuel can lead to food shortages.
- Land Use Competition: It can compete for land that could be used for food production.
Step 6
State FOUR advantages of the solar geyser over an ordinary electrical geyser.
Answer
- Limitless Energy Source: Solar energy is renewable and abundant.
- Cost Efficiency: Reduces electricity bills due to lower operational costs.
- Portability: Many solar geysers can be installed in various locations easily.
- Low Maintenance: Solar geysers generally require less maintenance compared to traditional geysers.