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QUESTION 5: PLASTER AND SCREED, BRICKWORK AND GRAPHICS AS MEANS OF COMMUNICATION (SPECIFIC) Start this question on a NEW page - NSC Civil Technology Construction - Question 5 - 2023 - Paper 1
Question 5
QUESTION 5: PLASTER AND SCREED, BRICKWORK AND GRAPHICS AS MEANS OF COMMUNICATION (SPECIFIC) Start this question on a NEW page. 5.1 Recommend the ratio that will... show full transcript
Worked Solution & Example Answer:QUESTION 5: PLASTER AND SCREED, BRICKWORK AND GRAPHICS AS MEANS OF COMMUNICATION (SPECIFIC) Start this question on a NEW page - NSC Civil Technology Construction - Question 5 - 2023 - Paper 1
Step 1
5.1 Recommend the ratio that will be used to obtain a smooth plaster finish for interior walls, using one bag of cement.
Answer
The recommended ratio to achieve a smooth plaster finish for interior walls using one bag of cement is typically 1:3, which translates to 1 part cement and 3 parts sand. Alternatively, a ratio of 1:6 (1 part cement to 6 parts sand) can also be used, depending on the desired thickness and smoothness of the plaster.
Step 2
5.2 In chronological order, explain the first THREE steps to prepare a concrete floor to receive the screed.
Answer
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Chip the surface: Ensure that the concrete surface is roughened by chipping away any smooth areas. This is vital for the screed to bond effectively.
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Remove all debris and dust: After chipping, clean the surface thoroughly to remove all dust, dirt, and debris that could interfere with adhesion.
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Test the absorption ability of the concrete: Spray water on the concrete to check its absorption. The surface should absorb water within a few minutes, indicating it's ready for the screed.
Step 3
5.3 Explain the term monolithic screed.
Answer
A monolithic screed is a type of flooring finish that is poured in a single layer over a substrate, typically concrete. This screed is designed to be laid over fresh concrete, ensuring a seamless surface without joints or breaks, which enhances durability and water resistance.
Step 4
5.4 Explain how you will plaster the stop end of a wall in chronological order.
Answer
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Clamp straight edges to stop-end of the wall: Start by securing straight edges vertically along the stop-end to guide the plaster application.
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Apply the plaster and allow to dry: Mix the plaster to the appropriate consistency, then apply it evenly over the stop-end, ensuring a smooth finish before allowing it to set.
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Cut the access plaster to the level of the straight edges: Once dry, carefully trim any excess plaster that extends beyond the straight edges, finishing the surface flush and smooth.
Step 5
5.5 State TWO advantages of a gauged arch.
Answer
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Looks neat and aesthetic: A gauged arch has a clean, streamlined appearance that enhances the visual appeal of a structure.
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Do not need plastering: The defined edges of a gauged arch often eliminate the need for additional plastering, saving time and materials in the finishing process.
Step 6
5.6 Draw in the ANSWER BOOK a neat sketch showing half of a wooden turning piece for a semi-circular arch with open laggings.
Answer
A neat sketch should illustrate the half-structure of a wooden turning piece for a semi-circular arch, focusing on the curvature and the detailed configuration of open laggings.
Step 7
5.7 ANSWER SHEET 5.7 shows the outlines of two consecutive brick courses of a one-and-a-half-brick pier built in English bond. Use ANSWER SHEET 5.7 and complete the pictorial views of the consecutive brick courses.
Answer
Utilize ANSWER SHEET 5.7 to accurately depict the two courses of bricks, ensuring that each brick is illustrated with proper alignment and bond, showcasing the English bond pattern.