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 means that all the options listed (pipe flanges, steel hangers, and perforated straps) can be utilized to secure 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
The correct answer is B: crosscut. This method is typically the most effective for ensuring a straight, clean cut.
Step 3
6.1.3 A property of solder:
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Answer
The correct answer is A: Bluish in colour. This typically indicates the quality and type of solder that can be used effectively in joining metal pipes.
Step 4
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 classifications indicate how the rivets are installed depending on accessibility to the joint.
Step 5
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 in the ANSWER BOOK, illustrating how the cover strip effectively joins the two plates together.
Step 6
6.3 Copy the following table into the ANSWER BOOK and tabulate the symbols under the correct headings.
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Answer
Under Drainage Above Ground:
6.3.1: Wash basin
Under Drainage Below Ground:
6.3.3: Inspection eye
6.3.4: Outflow pipe (or Outlet as appropriate).
Step 7
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 is typically 135°.
Step 8
6.4.2 Explain the purpose of A.
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Answer
The purpose of A (the inspection eye) is to gain access to the sewer pipe to inspect it, clear blockages, or allow for cleaning.
Step 9
6.5 Describe TWO aspects that fittings in a drainage system should comply with.
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Answer
Fittings should be made of a material suitable for the piping to ensure durability and prevent leaks.
They should be able to withstand internal pressure of 50 kPa and external pressure of 30 kPa without leaking.
Step 10
6.6 Name TWO methods of ventilating a drainage system to prevent syphonage.
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Answer
Ventilation pipes or vent pipes can be installed throughout the drainage system.
Vent valves can be used to allow air in and prevent syphonage.
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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Answer
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, with sewage being removed by a local municipality.
Step 12
6.9 Use ANSWER SHEET 6.9 and design and draw the complete sewerage layout.
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Answer
The design should accurately represent the connections of branch pipes, vent pipes, gulley traps, junctions, main sewer pipes, rodding eyes, and gradient as per the specifications in the answer sheet.
