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5.1 Predict TWO consequences of poorly constructed storm-water systems - NSC Civil Technology Civil Services - Question 5 - 2021 - Paper 1
Question 5
5.1 Predict TWO consequences of poorly constructed storm-water systems. 5.2 ANSWER SHEET 5.2 shows the elevation of a building with the fascia board in position. No... show full transcript
Worked Solution & Example Answer:5.1 Predict TWO consequences of poorly constructed storm-water systems - NSC Civil Technology Civil Services - Question 5 - 2021 - Paper 1
Step 1
Predict TWO consequences of poorly constructed storm-water systems.
Answer
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Discomfort of occupants or public due to improper drainage leading to stagnant water and maintenance issues.
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Damage to properties from flooding and water ingress, potentially compromising structural integrity and leading to costly repairs.
Step 2
Use ANSWER SHEET 5.2 and draw to scale 1 : 10 a square gutter attached to the fascia board.
Answer
To create the drawing:
- Begin by sketching the elevation of the building with the fascia board prominently displayed.
- Draw the PVC box gutter, ensuring it measures 125 mm in width and 80 mm in height.
- Include a stopped end of the same dimensions (125 mm x 80 mm) at one end of the gutter.
- Add two gutter clips along the gutter to hold it in place. Specify their locations.
- Incorporate the 60 mm gutter outlet correctly positioned to facilitate drainage to the downpipe.
- Ensure to represent the 60 mm square down pipe leading from the gutter downward.
- Label all components clearly in the drawing.
Step 3
Use the drawing on ANSWER SHEET 5.3 and draw the development of pipe A, with a 3 mm seam on the short side.
Answer
To develop pipe A:
- Identify the measurements from the top view of the cylindrical pipe elbow.
- Divide the circle into 12 equal parts to project the development accurately.
- Create projection lines for the circumference, ensuring correct dimensions are kept throughout.
- Draw outside lines for both the base and sides of the development.
- Add the 3 mm seam on the short side to finalize the development.
- Clearly label all parts of the development for clarity.