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5.1 Classify the type of finish that can be obtained by using the following: 5.1.1 A Tyrolene machine 5.1.2 Hessian cloth or cement bag 5.2 State TWO purposes of screed - NSC Civil Technology Construction - Question 5 - 2020 - Paper 1
Question 5
5.1 Classify the type of finish that can be obtained by using the following: 5.1.1 A Tyrolene machine 5.1.2 Hessian cloth or cement bag 5.2 State TWO purposes of ... show full transcript
Worked Solution & Example Answer:5.1 Classify the type of finish that can be obtained by using the following: 5.1.1 A Tyrolene machine 5.1.2 Hessian cloth or cement bag 5.2 State TWO purposes of screed - NSC Civil Technology Construction - Question 5 - 2020 - Paper 1
Step 1
5.1 Classify the type of finish that can be obtained by using the following:
Answer
5.1.1 A Tyrolene machine:
- This machine is used to achieve a splatter finish or roughcast finish, commonly utilized in external wall surfaces for texture and aesthetics.
5.1.2 Hessian cloth or cement bag:
- These can be used to achieve a bagging finish, which provides a smooth and textured surface by applying a thin layer of mortar.
Step 2
Step 3
5.3 Explain ONE method of preparing a smooth concrete floor to receive the screed.
Answer
One effective method is to chip the surface with a sharp tool to remove any surface skin, thereby exposing the hard, clean concrete underneath. Following this, it is important to wet the surface to enhance the bonding of the screed.
Step 4
Step 5
5.5 Differentiate between a rough arch and a gauged arch in terms of the respective shapes of the mortar joints.
Answer
- Rough arch: The mortar joints are typically wedge-shaped or triangular, creating a less uniform appearance.
- Gauged arch: The mortar joints will be uniform and rectangular in shape, ensuring a more aesthetically pleasing finish.
Step 6
5.6 Use ANSWER SHEET 5.6 and draw a neat sketch showing the alternate plan courses of a one-and-a-half brick pier built in stretcher bond.
Answer
In this sketch, the first course of bricks should be laid in a stretcher bond format, followed by the second course also in stretcher bond. Ensure to accurately represent the staggered joints typical of this bonding pattern.
Step 7
5.7 Use ANSWER SHEET 5.7 and draw to scale 1:10 a horizontal section view through a wooden door frame built into a 220 mm wall.
Answer
The drawing should depict a horizontal cross-section, clearly indicating the dimensions of the wall (220 mm), door frame (110 mm x 70 mm), DPC attached to the door frame, quarter rounds, and plaster finish. Ensure all components are labeled correctly and proportionally according to the scale.