4.1 Choose a description from COLUMN B that matches an item in COLUMN A - NSC Civil Technology Construction - Question 4 - 2022 - Paper 1
Question 4
4.1 Choose a description from COLUMN B that matches an item in COLUMN A. Write only the letter next to the question numbers (4.1.1 to 4.1.8) in the ANSWER BOOK, e.g.... show full transcript
Worked Solution & Example Answer:4.1 Choose a description from COLUMN B that matches an item in COLUMN A - NSC Civil Technology Construction - Question 4 - 2022 - Paper 1
Step 1
4.1.1 Advantage of ready-mixed concrete
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I - concrete has the same density throughout.
Step 2
4.1.2 Disadvantage of ready-mixed concrete
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H - delivery and pouring delays may affect the quality of the concrete.
Step 3
4.1.3 Boom pump
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G - uses a remote-controlled robotic arm to place concrete.
Step 4
4.1.4 Slump test
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F - used to determine the workability of concrete.
Step 5
4.1.5 Collapsed slump
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C - too much water was added to the concrete.
Step 6
4.1.6 Cube test
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E - compressive strength of 20 MPa after 21 days.
Step 7
4.1.7 Fine concrete
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A - uses flexible or steel hoses to place concrete.
Step 8
4.1.8 High-strength concrete
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K - compressive strength of 30 MPa after 28 days.
Step 9
4.2 State the minimum distance that excavated soil should be kept away from the edge of a trench.
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The minimum distance that excavated soil should be kept away is 600 mm.
Step 10
4.3 Explain THREE safety factors that should be considered before excavation begins.
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A competent person should evaluate the stability of the ground to ensure safety.
Draw up a safety plan and take sufficient steps to ensure safe working conditions.
Erect fencing around the perimeter of the excavation site to limit access.
Step 11
4.4 Describe TWO properties of steel shuttering.
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Steel shuttering is stronger than wood and timber board products.
It is reusable and has tight along seams and joints to prevent leaking of concrete.
Step 12
4.5 Describe THREE methods that can be used to level a site.
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Filling a slope using appropriate materials.
Cutting away a slope to achieve a level surface.
Using excavated soil to fill in low spots.
Step 13
4.6 Name THREE components of shuttering that is used to support trenches.
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Folding wedges/Wedges.
Walling boards.
Poling boards.
Step 14
4.7 Name ONE property of block board used in formwork.
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Block board is lightweight and easy to work with using ordinary woodworking tools.
Step 15
4.8.1 Identify the machine shown in FIGURE 4.8.
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The machine shown in FIGURE 4.8 is a Tamping rammer.
Step 16
4.8.2 Explain safe handling with regard to hands and feet when operating the machine.
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Do not place your hands/feet near the moving parts of the machine.
Use both hands to operate the machine and ensure a well-balanced stance.
Step 17
4.8.3 Motivate why it is important to clean the parts of the machine after it has been used.
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Cleaning the machine parts is important to prevent rust and ensure that the machine functions effectively.
Step 18
4.9 USE ANSWER SHEET 4.9 and complete the drawing of a vertical section of the formwork.
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Refer to the provided drawing guidelines on the answer sheet for accuracy and proportion.
