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5.1 Recommend the ratio that will be used to obtain a smooth plaster finish for interior walls, using one bag of cement - NSC Civil Technology Construction - Question 5 - 2023 - Paper 1
Question 5
5.1 Recommend the ratio that will be used to obtain a smooth plaster finish for interior walls, using one bag of cement. 5.2 In chronological order, explain the fir... show full transcript
Worked Solution & Example Answer:5.1 Recommend the ratio that will be used to obtain a smooth plaster finish for interior walls, using one bag of cement - 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 ideal ratio for a smooth plaster finish using one bag of cement is generally 1:3 (cement to sand). This proportion allows for a workable mix that achieves the desired smoothness and adhesion on interior walls.
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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Preparation of the Substrate: Begin by ensuring the concrete surface is clean and free from any debris or dust. Remove loose particles and any contaminating materials.
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Moistening the Surface: Lightly moisten the concrete base to prevent excessive absorption of water from the screed mixture, which can cause cracking.
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Application of Bonding Agents: Apply a primer or bonding agent to the concrete surface to enhance the adhesion between the screed and the concrete. Use a brush or roller for even coverage.
Step 3
5.3 Explain the term monolithic screed.
Answer
Monolithic screed refers to a type of screed that is applied in a single layer, resulting in a uniform and seamless surface. It is poured in one continuous operation, allowing for better bonding with the underlying subfloor and reducing the chances of cracking or delamination. This method ensures a durable and stable floor surface once cured.
Step 4
5.4 Explain how you will plaster the stop end of a wall in chronological order.
Answer
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Preparation of the Surface: Clean the stop end of the wall to ensure proper adhesion of the plaster mixture.
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Mixing the Plaster: Prepare the plaster mix according to recommended ratios, achieving a workable consistency.
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Application of Plaster: Using a trowel, apply the plaster to the stop end, ensuring an even layer. Feather the edges to blend with the adjoining wall.
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Finishing: Smooth the surface with a float or trowel to achieve the desired finish, and allow it to cure properly.
Step 5
5.5 State TWO advantages of a gauged arch.
Answer
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Aesthetic Appeal: Gauged arches provide a more visually appealing finish due to their precise and tailored construction, enhancing the overall design of the building.
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Structural Integrity: They are designed to distribute loads effectively, which can improve the structural integrity of openings and contribute to the longevity of the archway.
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 sketch should show half of a semi-circular arch with details on the wooden turning piece and open laggings, highlighting the structure's design for clarity.
Step 7
5.7 USE ANSWER SHEET 5.7 and complete the pictorial views of the consecutive brick courses.
Answer
On Answer Sheet 5.7, depict the consecutive brick courses of a one-and-a-half-brick pier built in English bond format, ensuring accurate representations of the brick placements and joint styles.