Study the sectional view of a wind turbine below - NSC Agricultural Technology - Question 3 - 2016 - Paper 1
Question 3
Study the sectional view of a wind turbine below.
Identify parts A and B of the wind turbine above.
State TWO problems associated with wind turbines used to genera... show full transcript
Worked Solution & Example Answer:Study the sectional view of a wind turbine below - NSC Agricultural Technology - Question 3 - 2016 - Paper 1
Step 1
Identify parts A and B of the wind turbine above.
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Answer
Part A is the Rotor/Propeller (nose cone, head) and Part B is the Gear Box (transmission, gear).
Step 2
State TWO problems associated with wind turbines used to generate electrical energy.
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The unreliability of the wind, which can be inconsistent and lead to energy shortages.
Initial installation cost is high, which may deter investment.
Step 3
Name and describe TWO devices installed on a wind turbine to ensure maximum efficiency of the turbine blades.
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Wind direction meter: This device orients the rotor/propeller properly into the wind to maximize energy capture.
Wind speed meter: This device measures wind speed to adjust the pitch of the blades for optimal performance.
Step 4
Recommend TWO different systems that can be used in this situation to produce hot water.
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Solar/Sun hot water system, which harnesses solar energy to heat water efficiently.
Electrical solar/sun panel system, which converts sunlight into electrical energy for heating water.
Step 5
State THREE economic factors that influence the production of biofuel.
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Fuel prices, which can impact the profitability of biofuel production.
Availability of water resources needed for crop growth to produce biofuel.
The potential impact of biofuel production on food supply and prices.
Step 6
Describe how electricity is generated in the hydro-electric plant below.
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Electricity generation starts with water flowing downward through a penstock. The falling water spins a turbine connected to a generator, converting the hydrokinetic energy into electrical energy.
Step 7
Name THREE applications of photovoltaic cells on a farm.
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