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4.1.1 Identify A and B - NSC Agricultural Technology - Question 4 - 2020 - Paper 1
Question 4
4.1.1 Identify A and B. 4.1.2 Explain the function of A in the picture above. 4.1.3 Name the material used to manufacture B. 4.1.4 Explain the causes of the small... show full transcript
Worked Solution & Example Answer:4.1.1 Identify A and B - NSC Agricultural Technology - Question 4 - 2020 - Paper 1
Step 1
Step 2
Explain the function of A in the picture above.
Answer
The function of part A is to protect the contact tip from contamination and damage while also directing the flow of shielding gas that surrounds the weld area. This shielding gas is essential for preventing oxidation of the molten weld pool, thus ensuring a cleaner and stronger weld.
Step 3
Step 4
Explain the causes of the small metal balls that form when welding with a MIG welder.
Answer
The small metal balls, often called spatter, can form due to several factors:
- Improper gas flow, such as having the gas closed or too low.
- Contaminants on the work surface, such as paint or grease.
- Incorrect settings on the welding machine, such as too high amperage or current.
- Inadequate shielding, which can allow outside elements to affect the weld.