3.1 Choose a description from COLUMN B that matches an item in COLUMN A - NSC Civil Technology Construction - Question 3 - 2016 - Paper 1
Question 3
3.1 Choose a description from COLUMN B that matches an item in COLUMN A. Write only the letter (A–G) next to the question number (3.1.1–3.1.5) in the ANSWER BOOK, fo... show full transcript
Worked Solution & Example Answer:3.1 Choose a description from COLUMN B that matches an item in COLUMN A - NSC Civil Technology Construction - Question 3 - 2016 - Paper 1
Step 1
Choose a description from COLUMN B that matches an item in COLUMN A.
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Answer
3.1.1 Kick pipe: B
3.1.2 Gutter: E
3.1.3 Grid-plate manhole cover on streets/pavements/in kerbs: D
3.1.4 Prepaid card system: C
3.1.5 Surface-mounted conduits: A
Step 2
Name any THREE materials that are used for the manufacture of pipes for a cold-water installation.
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Answer
PVC pipe
Copper pipe
Galvanized pipe
Step 3
Explain the purpose of A.
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The purpose of A is to provide water to the tap.
Step 4
Explain the function of cap B on the pipe bend.
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Cap B is removable to provide access to the inside of the pipe.
Step 5
Identify pipe C.
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Answer
Pipe C is a waste water pipe/PVC pipe/Galvanized pipe.
Step 6
State the diameter of pipe C.
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The diameter of pipe C is 40 mm/50 mm.
Step 7
Explain the purpose of D.
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The purpose of D is to anchor the pipe to the wall.
Step 8
Explain why you would fix a 45° PVC bend (E) at the end of pipe C.
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A 45° PVC bend (E) is used to guide the wastewater directly into the gully.
Step 9
State the diameter of pipe F.
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The diameter of pipe F is 100 mm interior/110 mm exterior.
Step 10
Describe the purpose of the water at G.
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The purpose of the water at G is to form a water seal/water trap/water lock to prevent bad odours and gasses from the sewer entering back into the building.
Step 11
Identify part H.
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Part H is a P-trap.
Step 12
Identify the following symbols as used in civil services:
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3.4.1: Wash tub
3.4.2: Sewer line/drain pipes
3.4.3: Safety valve
3.4.4: Storm water drain pipes
Step 13
Give TWO reasons why wastewater may not be channelled into a septic tank.
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It contains chemicals that are poisonous to the bacteria in the tank.
The tank will fill up quickly and block the system.
Step 14
Write the correct name of the part next to the letter (A–G) in the ANSWER BOOK.
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