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
The correct answer is D) All the above-mentioned. This option encompasses the various methods available for securing galvanized pipes, including pipe flanges, steel hangers, and perforated straps.
Step 2
6.1.2 When one needs to cut uPVC pipes to a specific length, one will use a ... saw.
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Answer
The correct answer is B) crosscut. A crosscut saw is specially designed for cutting materials like uPVC pipes to the desired length.
Step 3
6.1.3 A property of solder:
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Answer
The correct answer is D) Ductile. Solder must be ductile to ensure that it can be easily formed and maintain strong joints under various conditions.
Step 4
6.1.4 Flux is used to ...
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Answer
The correct answer is B) assist with cleaning the material to be soldered. Flux helps in removing oxides and contaminants from the surfaces to ensure a strong solder joint.
Step 5
6.1.5 Pop rivets are divided into two groups, namely ... rivets.
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Answer
The correct answer is A) blind and open. These groups categorize the types of pop rivets used in various applications.
Step 6
6.2 When soldering two tin plates together, a cover strip can be used to assist with joining them.
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Answer
A simple lapped joint with a cover strip should be drawn, showing the two tin plates overlapping with the cover strip on top.
Step 7
6.3 Copy the following table into the ANSWER BOOK and tabulate the symbols under the correct headings.
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Answer
In the table, 6.3.1 corresponds to a washbasin under 'DRAINAGE ABOVE GROUND', and 6.3.2 corresponds to an inspection eye under 'DRAINAGE BELOW GROUND'.
Step 8
6.4.1 Give the angle for the bend of the fitting.
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Answer
The angle for the bend of the fitting typically used in such applications is 135 degrees.
Step 9
6.4.2 Explain the purpose of A.
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Answer
The purpose of A is to facilitate the change in direction of the pipe, ensuring proper flow of sewage without causing blockages.
Step 10
6.5 Describe TWO aspects that fittings in a drainage system should comply with.
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Answer
Fittings should be made of material that is suitable for the piping, and they must be able to withstand internal water pressure of 50 kPa without leaking.
Step 11
6.6 Name TWO methods of ventilating a drainage system to prevent syphonage.
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Answer
Methods for ventilating include using vent pipes and vent valves to ensure that air flows freely through the drainage system.
Step 12
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 must be emptied when the sludge level rises above the outlet, while vacuum tanks must be emptied when they reach their maximum capacity.
Step 13
6.9 Use the assessment criteria on the ANSWER SHEET as a guide.
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Answer
Design the complete sewerage layout ensuring to include all necessary symbols and criteria detailed on ANSWER SHEET 6.9.
