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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 first stage where large debris such as leaves, sticks, and other floating materials are removed from the water. It ensures that the water entering the treatment system is free from these impurities.
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Sedimentation: During this stage, chemicals are added to the water that promote the settling of smaller particles. These particles sink to the bottom, allowing clearer water to be drawn for further treatment.
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Filtration: Here, the water passes through filters that remove remaining impurities, including dirt and microorganisms. Various filter media may be used, enhancing the purification process.
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Chlorination: In this vital stage, chlorine is added to the water to eliminate bacteria and other harmful pathogens. This step is crucial for ensuring water safety before it enters homes.
Step 2
In relation to the cold water supply system in a house, state the function of each of the following: - ball cock/valve - stop cock - overflow pipe.
Answer
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Ball cock/valve: This device regulates the flow of water into the tank. It stops the water from overflowing by shutting off the supply when the tank reaches a certain level.
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Stop cock: This is a control valve that allows the user to turn off the water supply to the entire house, which can be handy for repairs or emergencies.
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Overflow pipe: This pipe prevents flooding by carrying excess water away from the tank in case it becomes overfilled, directing it safely to a drainage point.
Step 3
Describe two methods of reducing the amount of water used in the home.
Answer
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Installing Water-Saving Fixtures: By using low-flow showerheads and faucets, households can significantly decrease water usage without sacrificing performance.
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Adopting Water Efficient Habits: Simple practices such as taking shorter showers, fixing leaks promptly, and only running dishwashers or washing machines with full loads can further contribute to substantial water savings.