FIGURE 6.1 shows components of welding equipment - NSC Mechanical Technology Automotive - Question 6 - 2016 - Paper 1
Question 6
FIGURE 6.1 shows components of welding equipment. Answer the questions that follow.
6.1.1 Identify the type of equipment shown in FIGURE 6.1.
6.1.2 Label component... show full transcript
Worked Solution & Example Answer:FIGURE 6.1 shows components of welding equipment - NSC Mechanical Technology Automotive - 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 a MIG/MAGS welding equipment. This type of welding utilizes a continuous wire feeding process along with a shielding gas.
Step 2
Label components A–G.
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Answer
The components are labeled as follows:
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. This helps to avoid oxidation and ensures a clean weld.
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.
Weld temperature is too low.
Step 5
Name TWO causes of each of the following welding defects: Undercutting.
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Faulty electrode manipulation.
Current too high.
Step 6
State TWO measures to prevent the following welding defects: Lack of fusion.
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Answer
Adjust the electrode angle and prepare the V groove properly.
Ensure the proper current is used to allow full fusion.
Step 7
State TWO measures to prevent the following welding defects: Welding craters.
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Answer
Use a lower current.
Employ proper welding technique.
Step 8
Explain how you will conduct a dye penetration test on a welded joint.
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Answer
To conduct a dye penetration test on a welded joint, follow these steps:
Clean the weld that needs to be tested thoroughly to remove any impurities.
Apply the dye and allow it to penetrate the weld joint.
Excess dye should be cleaned away with a suitable agent, ensuring a clear view of the weld area.
Apply a developer to draw out the dye trapped in any cracks.
