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Using a clear labelled diagram, sketch a system to provide cold water to a wash hand basin, as shown in the sketch - Leaving Cert Construction Studies - Question 3 - 2006
Question 3
Using a clear labelled diagram, sketch a system to provide cold water to a wash hand basin, as shown in the sketch. Include the following in your diagram: - rising m... show full transcript
Worked Solution & Example Answer:Using a clear labelled diagram, sketch a system to provide cold water to a wash hand basin, as shown in the sketch - Leaving Cert Construction Studies - Question 3 - 2006
Step 1
Using a clear labelled diagram, sketch a system to provide cold water to a wash hand basin, as shown in the sketch.
Answer
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Sketch the Diagram: Start by drawing a clear and labeled diagram that includes the major components: the cold water storage tank, rising main, pipework, and necessary valves.
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Water Storage Tank: Draw a 230 liter cold water storage tank. Label it clearly. Indicate a ballcock and valve at the top of the tank.
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Overflow and Valves: Include a 22 mm overflow pipe connected to the tank. Ensure to add a stop valve on the supply line leading to the washing hand basin.
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Rising Main: Illustrate a 12 mm rising main connected to the 15 mm cold feed towards the wash hand basin. This should also be labeled appropriately.
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Connection to Wash Hand Basin: Draw the connection to the wash hand basin clearly, labeling all parts such as the cold feed and any other necessary connections.
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Final Touches: Review your diagram for clarity and make sure that all components are well labeled with the correct dimensions where applicable.
Step 2
Using notes and neat freehand sketches, show one method that would prevent the freezing of water in the storage tank.
Answer
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Insulate the Pipes: Use fiberglass or pipe insulation wrapped around all pipes to prevent heat loss.
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Insulate the Storage Tank: Enclose the water storage tank with either a rigid well-sealed insulation or with fiberglass material wrapped around the tank to minimize exposure to cold air.
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Place the Tank Properly: Make sure the tank is placed in an attic or in spaces that maintain a higher temperature. Ensure it is at least 750 mm away from any external wall or roof surface.
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Do Not Insulate Underneath: Leave the bottom of the tank without insulation, allowing warm air from below to rise and maintain a suitable temperature in the tank.
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Install a Heating Device: Consider installing a frost stat (thermostat) or a heating device in the attic area. This will activate when temperatures drop to a freezing point, effectively preventing the water in the tank from freezing.