1.1 Choose a description from COLUMN B that matches an item in COLUMN A - NSC Civil Technology Civil Services - Question 1 - 2019 - Paper 1
Question 1
1.1 Choose a description from COLUMN B that matches an item in COLUMN A. Write only the letter (A–G) next to the question numbers (1.1.1 to 1.1.5) in the ANSWER BOOK... show full transcript
Worked Solution & Example Answer:1.1 Choose a description from COLUMN B that matches an item in COLUMN A - NSC Civil Technology Civil Services - Question 1 - 2019 - Paper 1
Step 1
1.1.1 Galvanising
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Answer
Galvanising refers to the process of applying a protective zinc coating to steel or iron in order to prevent rusting. Therefore, the correct match is G.
Step 2
1.1.2 Electroplating
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Electroplating involves applying a thin layer of metal onto a substrate via the process of electrolysis. This protects the underlying material; therefore, the correct match is E.
Step 3
1.1.3 Curing
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Curing refers to the process of maintaining adequate moisture, temperature, and time to allow the chemical hydration of the cement. This is crucial to enhance strength and durability. The correct match is C.
Step 4
1.1.4 Paint
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Answer
Paint is a substance utilized to provide color and protection to surfaces. It typically involves a liquid mixture that coats surfaces, becoming a solid film upon drying, which aligns with D.
Step 5
1.1.5 Powder coating
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Powder coating is a finishing process where dry powder is applied and then heated to form a hard, protective finish. It corresponds to A.
Step 6
1.2 Explain ONE cause of injuries when handling materials.
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One common cause of injuries when handling materials is improper lifting techniques. When heavy materials or loads are not lifted properly, it can lead to strain injuries, particularly in the back and shoulders.
Step 7
1.3 Give the angle/ratio at which a ladder should be placed against a wall.
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Answer
A ladder should be placed at a ratio of 1:4, which means for every 4 units of height, the base of the ladder should be 1 unit away from the wall, or it can be positioned at an angle of 75 degrees.
Step 8
1.4 Explain TWO safety precautions that must be followed when using a builder's hoist.
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First, ensure that the hoist is operated by a qualified person to avoid accidents. Second, never overload the hoist beyond its recommended weight capacity to prevent mechanical failure.
Step 9
1.5.1 Identify both A and B.
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Answer
A is a Laser level and B is a Dumpy level.
Step 10
1.5.2 Name ONE use of A and B respectively.
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A (Laser level) is used to ensure precise horizontal and vertical alignment when installing ceilings or floor tiles. B (Dumpy level) is used to determine differences between levels and slopes.
Step 11
1.6.1 Identify the fastener that is used in D.
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Answer
The fastener used in D is a Rawl bolt.
Step 12
1.6.2 Describe the steps in A–D above in your ANSWER BOOK.
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Step A involves drilling a hole of the required diameter. Step B removes debris from the hole. Step C introduces the bolt and anchor into the hole, and Step D involves securing the bolt tightly to the surface.
Step 13
1.6.3 Justify the use of this fastener to secure the bracket of a heavy gate to a wall.
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Answer
Rawl bolts are ideal for securing heavy structures due to their excellent tensile strength. They are designed to resist pull-out failure, making them reliable for anchoring brackets of substantial weight.
