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... 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
Energy source C, shown in the image, utilizes a generator as part of its structure, specifically in the hydroelectric system.
Step 2
Describe the working principles of energy source B.
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Energy source B utilizes a geyser mechanism where cold water passes through glass tubes heated by solar energy. The hot water then moves into a copper pipe system connecting to the geyser, which heats the water further. The copper element plays a crucial role in this heating process.
Step 3
Identify the device that must be connected to energy source A to change direct current to alternating current.
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An inverter is the device needed to convert the direct current produced by energy source A into alternating current.
Step 4
Identify energy source C.
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Energy source C is a concentrated solar energy system, also referred to as Solar or Sun power.
Step 5
State TWO disadvantages of wind turbine blades turning too fast.
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The blades could become damaged due to excessive strain.
The structure of the turbine might collapse under high stress.
Step 6
Identify THREE geographical challenges that may arise during a survey for a geothermal energy power station.
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The rock might not be suitable for drilling, affecting accessibility.
Availability of water could be limited in the region for the geothermal processes.
There could be volcanic activities that pose risks during the survey.
Step 7
Name an alternative racing fuel that could supplement petroleum.
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Methanol is an alternative racing fuel that can be used alongside petroleum.
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 from landfills
Natural gas
Step 9
State THREE disadvantages associated with hydroelectric power plants.
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They often require limited plant locations, impacting their availability.
Initial costs for building such plants can be quite high.
They are susceptible to disturbances from natural events, such as floods or earthquakes.
Step 10
Give TWO reasons why hydroelectric power plants are limited in South Africa.
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Water scarcity is a significant challenge preventing the establishment of new plants.
Inadequate water flow in rivers limits the feasibility of hydroelectric projects.
