6.1 Various options are given as possible answers to the following questions - NSC Civil Technology Civil Services - Question 6 - 2019 - Paper 1
Question 6
6.1 Various options are given as possible answers to the following questions. Choose the answer and write only the letter (A–D) next to the question numbers (6.1.1 t... show full transcript
Worked Solution & Example Answer:6.1 Various options are given as possible answers to the following questions - NSC Civil Technology Civil Services - Question 6 - 2019 - Paper 1
Step 1
6.1.1 One can use ... to secure galvanised pipes to different surfaces.
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Answer
D. All the above-mentioned. This option includes pipe flanges, steel hangers, and perforated straps which are all suitable for securing galvanised pipes.
Step 2
6.1.2 When one needs to cut uPVC pipes to a specific length, one will use a ...
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Answer
A. hack-saw. A hack-saw is the most appropriate tool for making precise cuts to uPVC pipes.
Step 3
6.1.3 A property of solder:
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D. Ductile. Solder must have ductility to form a strong joint without breaking.
Step 4
6.1.5 Pop rivets are divided into two groups, namely ... rivets.
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A. blind and open. These refer to the types of pop rivets based on how they are installed.
Step 5
6.2 When soldering two tin plates together, a cover strip can be used to assist with joining them together.
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To illustrate the concept, a simple lapped joint should be drawn showing the cover strip effectively joining the two plates.
Step 6
6.3 Copy the following table into the ANSWER BOOK and tabulate the symbols under the correct headings.
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DRAINAGE ABOVE GROUND: 6.3.1 OR Water meter, 6.3.4;
DRAINAGE BELOW GROUND: 6.3.2 OR 6.3.3 OR Inspection eye (IE).
Step 7
6.4.1 Give the angle for the bend of the fitting.
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The angle for the bend of the fitting is 135°.
Step 8
6.4.2 Explain the purpose of A.
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The purpose of A is to provide an access point for inspection and maintenance of the drainage system.
Step 9
6.5 Describe TWO aspects that fittings in a drainage system should comply with.
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Fittings should be made of materials that are suitable for the piping and must be able to withstand internal and external pressures.
Step 10
6.6 Name TWO methods of ventilating a drainage system to prevent syphoning.
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Ventilation pipes and vent valves are critical to preventing syphoning in drainage systems.
Step 11
6.7 Describe the difference between septic tanks and vacuum tanks in terms of the removal of the sewage.
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Septic tanks are emptied when the sludge level rises, while vacuum tanks must be emptied regularly by local municipalities when full.
Step 12
6.9 ANSWER SHEET 6.9 shows a line diagram of a house with a granny flat and an incomplete sewerage layout.
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Design should incorporate all relevant aspects such as branch pipes, vent pipes, gulleys, junctions, inspection eyes, and gradients, as demonstrated in the provided layout.
