Photo AI
4.1 Redraw the table below in your ANSWER BOOK - NSC Agricultural Technology - Question 4 - 2018 - Paper 1
Question 4
4.1 Redraw the table below in your ANSWER BOOK. Complete the table by comparing MIG welding with arc welding using the given headings. | HEADINGS | MIG WELDING | AR... show full transcript
Worked Solution & Example Answer:4.1 Redraw the table below in your ANSWER BOOK - NSC Agricultural Technology - Question 4 - 2018 - Paper 1
Step 1
Step 2
Briefly describe FIVE safety measures that must be followed when welding with the MIG-welding machine.
Answer
- Remove all materials that can catch fire near the welding area.
- Protect eyes by wearing a welding shield or screens.
- Wear gloves made of heat-resistant materials.
- Keep the area well-ventilated to avoid fumes.
- Prevent sparks from catching on clothing by wearing a welding apron.
Step 3
Name THREE different types of welding movements that can be considered when making an arc-welding run AND make a neat drawing of EACH welding figure.
Answer
- Figure 8 - A continuous looping movement that resembles the number 8.
- U-shape - Movements that form a U formation on the workpiece.
- Zigzag - A back-and-forth motion that creates a zigzag pattern on the weld.
Step 4
Describe the cutting procedure that must be followed to ensure a safe and clean cut when cutting a 10 mm steel plate with an oxyacetylene set.
Answer
- Set the required gas flow on the cylinders.
- Adjust the oxy-acetylene torch according to the cutting needs.
- Heat the material to be cut until it is red hot.
- Use the oxygen lever to blow away the melted metal while cutting.
Step 5
Explain the influence that water or moisture has on the nozzle of the plasma-cutting apparatus below.
Answer
Water or moisture can cause short circuits and damage the cutting nozzle due to internal arcing that occurs within. This can lead to unevenness in the flame, affecting the quality of the cut.
Step 6
Design a cattle-handling facility consisting of ONE big holding kraal, THREE smaller kraals, ONE crush pen and functional gates.
Answer
The design should feature a large central kraal for holding cattle and three smaller kraals for processing. The crush pen should be easily accessible for handling the cattle with effective gates for seamless movement. It should maximize space while maintaining a functional and protective environment.