5.1 Name the first step you will follow when plastering a wall - NSC Civil Technology Construction - Question 5 - 2022 - Paper 1
Question 5
5.1 Name the first step you will follow when plastering a wall.
5.2 Describe the main function of water when mixing plaster.
5.3 Name the mixing ratio of cement an... show full transcript
Worked Solution & Example Answer:5.1 Name the first step you will follow when plastering a wall - NSC Civil Technology Construction - Question 5 - 2022 - Paper 1
Step 1
Name the first step you will follow when plastering a wall.
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Answer
The first step in plastering a wall is to wet the wall. This ensures proper adhesion of the plaster to the surface.
Step 2
Describe the main function of water when mixing plaster.
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Answer
The main function of water when mixing plaster is to make the mixture workable. This allows for easier application and smooth finishing.
Step 3
Name the mixing ratio of cement and sand that is used in plaster for a wavy surface.
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The mixing ratio of cement to sand used in plaster for a wavy surface is 1:3.
Step 4
For which type of plaster finish is the Tyrolean machine used?
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The Tyrolean machine is used for achieving a splatter dash finish on plaster.
Step 5
Name TWO types of screed.
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Two types of screed are:
Dry screed
Monolithic screed
Step 6
Name the admixture you will add to reduce the water/cement ratio.
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The admixture that can be added to reduce the water/cement ratio is a water-reducing agent.
Step 7
Explain the purpose of the cavity.
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Answer
The purpose of the cavity is to ensure that no water will penetrate the inner wall, and to provide insulation against heat, sound, and cold.
Step 8
Use a freehand drawing to differentiate between a nylon wall tie and a twisted pattern wall tie.
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A nylon wall tie is typically a long piece of nylon with a thick midsection, while a twisted pattern wall tie has a twisted design at the center. Drawings should clearly show these differences.
Step 9
What material is used for grouting between paving bricks?
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Plaster sand or a sand/cement slurry is typically used for grouting between paving bricks.
Step 10
Describe the reason for the construction failure in FIGURE 5.9 below.
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The construction failure in Figure 5.9 is due to poorly constructed edge restraint, leading to movement and misalignment of the paving bricks.
