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 me... show full transcript
Worked Solution & Example Answer:4.1.1 Identify A and B - NSC Agricultural Technology - Question 4 - 2020 - Paper 1
Step 1
Identify A and B.
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Answer
A is the gas shroud/cup/cover, and B is the welding electrode or wire.
Step 2
Explain the function of A in the picture above.
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Answer
The function of part A is to protect the contact tip from contamination and to direct the flow of shielding gas to the welding area, ensuring a clean and stable environment for the weld.
Step 3
Name the material used to manufacture B.
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Answer
Part B is typically manufactured from steel, specifically furious metals suitable for welding applications.
Step 4
Explain the causes of the small metal balls that form when welding with a MIG welder.
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Answer
Small metal balls can form on the welding surface due to several reasons: gas might be closed or not flowing properly, the surface could be dirty (like having paint or grease), the plate could be rusted, incorrect welding settings like too low current or the wrong distance between the electrode and workpiece, or improper shielding gas flow causing contamination.
