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5.1.1 Explain why reinforced concrete is preferred in the manufacturing of A - NSC Civil Technology Civil Services - Question 5 - 2022 - Paper 1
Question 5
5.1.1 Explain why reinforced concrete is preferred in the manufacturing of A. 5.1.2 Describe the logic for having a fall/slope when positioning B.
Worked Solution & Example Answer:5.1.1 Explain why reinforced concrete is preferred in the manufacturing of A - NSC Civil Technology Civil Services - Question 5 - 2022 - Paper 1
Step 1
Explain why reinforced concrete is preferred in the manufacturing of A.
Answer
Reinforced concrete is often preferred for manufacturing surface channels like A for several reasons:
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Strength: Reinforced concrete is significantly stronger than mass concrete. The inclusion of steel reinforcement bars (rebars) improves tensile strength, resulting in a structure that can withstand high loads without failure.
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Durability: It can withstand various environmental factors and remain durable over longer periods, which is essential for outdoor applications like drainage systems.
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Water Resistance: The composition allows it to manage and withstand the force of water flow and large volumes effectively, making it suitable for channels that deal with stormwater management.
Step 2
Describe the logic for having a fall/slope when positioning B.
Answer
The logic for having a fall or slope when positioning concrete shoes like B is primarily for effective drainage. This design helps ensure that water flows away from the building rather than pooling around its foundation, which can lead to structural damage over time. A proper slope allows for the efficient movement of rainwater down to downpipes and away from the property, enhancing the overall water management system.
Step 3
5.2 ANSWER SHEET 5.2 shows the incomplete sectional view of a roof and wall.
Answer
To complete the drawing, include the following elements:
- Fascia Board: This is essential for supporting the gutter.
- Square Gutter: Depict this directly under the fascia, aligned properly.
- Gutter Clip: Illustrate this to secure the square gutter in place, ensuring proper angle alignment.
- Down Pipe: Show this extending from the gutter to direct water downwards.
- Holder Bat: Indicate where this will support the gutter.
- Rainwater Shoe: Ensure this is properly positioned at the base of the downpipe to direct water away effectively.
Make sure the proportions are accurate and all elements fit harmoniously within the design.
Step 4
5.3 ANSWER SHEET 5.3 shows the front view and auxiliary view of two cylindrical pipes.
Answer
In this step, begin by observing the dimensions associated with both views provided in the drawing. Then, create the development of the pipe A as follows:
- Dividing the Circle: Divide the circumference into 12 equal parts.
- Projection Lines: Draw vertical projection lines from each division to represent the height of the pipe.
- Developing: From the circle, each division should be extended longitudinally to showcase how the pipe unfolds or develops into a flat shape.
Verify that the measurements from both views are coherent and consistent, resulting in an accurate development representation.