QUESTION 3: CONSTRUCTION ASSOCIATED WITH CIVIL SERVICES, OHSA AND QUANTITIES (SPECIFIC)
FIGURE 3.1 below shows safety equipment - NSC Civil Technology Civil Services - Question 3 - 2023 - Paper 1
Question 3
QUESTION 3: CONSTRUCTION ASSOCIATED WITH CIVIL SERVICES, OHSA AND QUANTITIES (SPECIFIC)
FIGURE 3.1 below shows safety equipment.
3.1.1 Identify A and B.
3.1.2 To w... show full transcript
Worked Solution & Example Answer:QUESTION 3: CONSTRUCTION ASSOCIATED WITH CIVIL SERVICES, OHSA AND QUANTITIES (SPECIFIC)
FIGURE 3.1 below shows safety equipment - NSC Civil Technology Civil Services - Question 3 - 2023 - Paper 1
Step 1
3.1.1 Identify A and B.
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Answer
A is identified as the safety harness and B as the locking snap hook or clip.
Step 2
3.1.2 To what should B be attached?
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B should be attached to a secure anchor point or safety line.
Step 3
3.1.3 Name ONE safety item that a worker must wear in order to prevent infections when working with raw sewage.
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One safety item that a worker must wear is safety goggles.
Step 4
3.2.1 Identify A to C.
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Answer
A is the benching, B is the branch channel, and C is the inlet/inlet pipe.
Step 5
3.2.2 Explain TWO faults that are illustrated in the installation of this manhole.
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Answer
One fault is that the walls are not double-skinned, leading to potential failure. Another fault is the incorrect bonding of bricks, which can compromise structure integrity.
Step 6
3.2.3 Name a type of manhole that is NOT built with bricks.
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A concrete ring manhole is a type that is not built with bricks.
Step 7
3.2.4 A manhole cover is removed for maintenance. Describe ONE safety precaution that needs to be applied to ensure the safety of pedestrians.
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One safety precaution is to cordon off the area and post warning signs to alert pedestrians.
Step 8
3.3 Calculate the fall of pipe A.
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Answer
To calculate the fall of the 100 mm pipe over a length of 2 m, we use the formula:
Fall = Total Length / Gradient
Assuming a gradient of 1:40, this gives us:
Fall = 2000 mm / 40 = 50 mm.
Step 9
3.4 Describe the term backfilling.
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Backfilling is the process of putting soil back into a trench or excavation to provide support or to restore the original ground level.
Step 10
3.5 Use the information in FIGURE 3.5 below and take off the quantities of materials needed.
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