Study the pictures of the alternative energy sources A, B and C below and answer the questions that follow - NSC Agricultural Technology - Question 3 - 2022 - Paper 1
Question 3
Study the pictures of the alternative energy sources A, B and C below and answer the questions that follow.
A
B
C
3.1.1 Choose the energy source that makes use o... show full transcript
Worked Solution & Example Answer:Study the pictures of the alternative energy sources A, B and C below and answer the questions that follow - NSC Agricultural Technology - Question 3 - 2022 - Paper 1
Step 1
Choose the energy source that makes use of a generator.
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Answer
The energy source that makes use of a generator is Source C, which is usually associated with hydroelectric power generation.
Step 2
Describe the working principles of energy source B.
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Answer
Energy source B operates through the following principles:
Cold water passes through glass tubes that are heated by solar energy.
The heated water then enters a geyser through a copper pipe network.
Inside the geyser, the hot water heats up the cold water inside, making it suitable for use.
Step 3
Identify the device that must be connected to energy source A to change direct current to alternating current.
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The device that must be connected to energy source A is an inverter.
Step 4
Identify energy source C.
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Energy source C is concentrated solar, which can also be referred to as solar panels or solar power systems.
Step 5
State TWO disadvantages of wind turbine blades turning too fast.
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The blades could be damaged due to excessive strain.
The turbine structure may collapse under high stress conditions.
Step 6
THREE geographical challenges that may arise during a survey for a geothermal energy power station.
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The rock may not be suitable for drilling due to hardness or composition.
There may be insufficient water supply for the geothermal system.
Finding a sustainable and suitable site for a power plant can be challenging, especially in geologically unstable areas.
Step 7
Name an alternative racing fuel that could supplement petroleum.
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An alternative racing fuel that could supplement petroleum is methanol.
Step 8
Identify THREE substances that could be used to manufacture the alternative racing fuel named in QUESTION 3.4.1.
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Woody plant fiber.
Methane gas sourced from landfills.
Natural gas.
Step 9
State THREE disadvantages associated with hydroelectric power plants.
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Limited plant locations due to geographical constraints.
High initial costs required for construction and infrastructure.
Environmental impacts such as flood risks and disruption of local ecosystems.
Step 10
Give TWO reasons why hydroelectric power plants are limited in South Africa.
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Water scarcity in many regions limits the availability of water resources for hydroelectric generation.
Inadequate water flow and river management can hinder the feasibility of such projects.
