3.1 FIGURE 3.1 below is an illustration of a manhole - NSC Civil Technology Civil Services - Question 3 - 2019 - Paper 1
Question 3
3.1 FIGURE 3.1 below is an illustration of a manhole. Study the illustration and answer the questions that follow.
3.1.1 Describe the difference between A and D wit... show full transcript
Worked Solution & Example Answer:3.1 FIGURE 3.1 below is an illustration of a manhole - NSC Civil Technology Civil Services - Question 3 - 2019 - Paper 1
Step 1
3.1.1 Describe the difference between A and D with regard to the flow of sewage.
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Answer
The difference between A and D is that A is the entrance point where sewage enters the system, while D is the exit point where sewage flows out of the system. Sewage runs from A to D.
Step 2
3.1.2 Identify B.
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Answer
B is the inspection chamber of the manhole.
Step 3
3.1.3 The benching (C) must be installed at a slope. Give ONE reason for this.
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Answer
Benching must be installed at a slope to ensure that sewage flows smoothly towards the outlet without stagnation or blockage.
Step 4
3.1.4 Recommend ONE type of brick that can be used to build the walls of the manhole.
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Answer
Engineering brick is recommended for building the walls of the manhole due to its strength and water-resistant properties.
