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The diagram below indicates the stages involved in the treatment of water before it enters the home - Leaving Cert Home Economics - Question 1(a) - 2012
Question 1(a)
The diagram below indicates the stages involved in the treatment of water before it enters the home. (i) Explain four of the stages involved in the treatment of wat... show full transcript
Worked Solution & Example Answer:The diagram below indicates the stages involved in the treatment of water before it enters the home - Leaving Cert Home Economics - Question 1(a) - 2012
Step 1
Explain four of the stages involved in the treatment of water to make it safe for human consumption and domestic use.
Answer
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Screening: This is the initial step where large particles and debris such as leaves and twigs are removed from the water. This helps to prevent damage to subsequent treatment equipment.
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Sedimentation: In this stage, chemicals may be added to the water to promote the settling of smaller particles. These particles then sink to the bottom of the tank, allowing clear water to be drawn from the top.
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Filtration: Water passes through filters made of sand, gravel, and stones. This process effectively removes remaining impurities and provides a clearer, cleaner water supply.
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Chlorination and Fluoridation: Chlorine is added to disinfect the water, killing bacteria and harmful microorganisms, while fluoride is sometimes added for dental health benefits.
Step 2
In relation to the cold water supply system in a house, state the function of each of the following:
Answer
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Ball cock/valve: This controls the water level in the tank, allowing the tank to fill when water levels are low and stopping the flow when the desired level is reached.
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Stop cock: The stop cock allows the water supply to the home to be turned off during emergencies or repairs, preventing flooding.
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Overflow pipe: This pipe prevents overfilling and potential flooding by allowing excess water to escape if the water level exceeds a certain point.
Step 3
Describe two methods of reducing the amount of water used in the home.
Answer
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Installation of Low-Flow Fixtures: Replacing traditional faucets and showerheads with low-flow models can significantly reduce water usage without sacrificing performance.
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Utilization of Water-Efficient Appliances: Using dishwashers and washing machines that are designed to use less water while still being effective can help minimize overall water consumption in the home.