6.1 Identify the type of equipment shown in FIGURE 6.1 - NSC Mechanical Technology Welding and Metalwork - Question 6 - 2016 - Paper 1
Question 6
6.1 Identify the type of equipment shown in FIGURE 6.1.
6.1.2 Label components A–G.
6.1.3 What is the purpose of the gas during the welding process?
6.2 Name TWO ... show full transcript
Worked Solution & Example Answer:6.1 Identify the type of equipment shown in FIGURE 6.1 - NSC Mechanical Technology Welding and Metalwork - Question 6 - 2016 - Paper 1
Step 1
Identify the type of equipment shown in FIGURE 6.1.
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Answer
The equipment shown in FIGURE 6.1 is MIG/MAGS welding equipment.
Step 2
Label components A–G.
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Answer
A = Shielding gas cylinder
B = Regulator
C = Gas flow meter
D = Continuous wire reel
E = Welding gun
F = Arc
G = Earth clamp
Step 3
What is the purpose of the gas during the welding process?
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Answer
The purpose of the gas during the welding process is to prevent oxygen from coming into contact with the molten metal.
Step 4
Name TWO causes of each of the following welding defects: Slag inclusion.
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Answer
The included angle is too narrow.
Rapid chilling.
Step 5
Name TWO causes of each of the following welding defects: Undercutting.
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Answer
Faulty electrode manipulation.
Current too high.
Step 6
State TWO measures to prevent the following weld defects: Lack of fusion.
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Answer
Adjust the electrode angle and prepare the V groove properly.
Use proper current to ensure full fusion.
Step 7
State TWO measures to prevent the following weld defects: Weld craters.
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Answer
Use lower current settings.
Implement proper welding techniques.
Step 8
Explain how you will conduct a dye penetration test on a welded joint.
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Answer
First, clean the weld area thoroughly to remove any contaminants. Next, apply the dye to the clean surface and allow it to penetrate for a specified time. Afterward, remove any excess dye using a cleaner, followed by drying the surface. Finally, spray a developer to visualize any defects revealed by the dye.
