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Using notes and neat freehand sketches, show two considerations that should be taken into account when laying sewer pipes for a domestic dwelling to ensure the safe removal of sewage from the dwelling - Leaving Cert Construction Studies - Question 2 - 2007
Question 2
Using notes and neat freehand sketches, show two considerations that should be taken into account when laying sewer pipes for a domestic dwelling to ensure the safe ... show full transcript
Worked Solution & Example Answer:Using notes and neat freehand sketches, show two considerations that should be taken into account when laying sewer pipes for a domestic dwelling to ensure the safe removal of sewage from the dwelling - Leaving Cert Construction Studies - Question 2 - 2007
Step 1
Using notes and neat freehand sketches, show two considerations that should be taken into account when laying sewer pipes for a domestic dwelling to ensure the safe removal of sewage from the dwelling.
Answer
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Pipe Layout: The layout should be straight and as simple as possible. This minimizes bends and changes in direction, which can lead to blockages. Pipes must be laid in a straight line, should change direction minimally, and should avoid any unnecessary alterations to streamline the flow.
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Gradient Requirement: The pipes need to be installed at an adequate slope or gradient to facilitate proper drainage. For instance, a 6 cm to 10 cm diameter pipe should have a slope of at least 1:100 to ensure effective sewage flow.
Step 2
An inspection chamber is located at A in the sketch of the sewerage system for a dwelling house as shown. Using notes and a neat freehand sketch, show a vertical section through the inspection chamber.
Answer
In the vertical section of the inspection chamber, the following components should be depicted:
- Concrete Foundation: A sturdy base providing stability for the structure.
- Side Walls: Vertical walls that enclose the chamber to prevent soil collapse.
- Position of the Drain: Clearly illustrate the entrance of the drain into the chamber.
- Bending to the Drain: Show the angle at which the drain connects to ensure effective flow into the chamber.
- Cover of Inspection Chamber: Include details of the cover that provides access for inspection and maintenance purposes.
Step 3
Outline one reason why the inspection chamber is located at A as shown.
Answer
The inspection chamber is located at A for the following reason: Access is required to clear any blockages that may occur at this junction. This ensures that any issues can be managed promptly, maintaining the proper functioning of the sewer system.