FIGURE 6.1 shows components of welding equipment - NSC Mechanical Technology Welding and Metalwork - 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 Welding and Metalwork - Question 6 - 2016 - Paper 1
Step 1
6.1.1 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
6.1.2 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
6.1.3 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 ensures the integrity of the weld by protecting it from oxidation.
Step 4
6.2.1 Slag inclusion.
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Answer
Causes of slag inclusion include:
Included angle is too narrow.
Rapid chilling during welding.
Step 5
6.2.2 Undercutting.
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Causes of undercutting include:
Faulty electrode manipulation.
Current too high during the welding process.
Step 6
6.3.1 Lack of fusion.
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Answer
Measures to prevent lack of fusion include:
Adjust the electrode angle and prepare the V groove properly.
Use sufficient weave to melt the sides of the joint.
Step 7
6.3.2 Weld craters.
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Measures to prevent weld craters include:
Use lower current during the welding process.
Employ proper welding techniques.
Step 8
6.4 Explain how you will conduct a dye penetration test on a welded joint.
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To conduct a dye penetration test, follow these steps:
Clean the weld area that needs to be tested.
Spray the dye onto the clean surface.
Allow the dye to penetrate the weld joint for a specified time.
Clean excess dye with a suitable cleaning agent.
Spray a developer on the surface to draw out the dye trapped in any cracks.
Evaluate the resultant surface to identify all surface defects.
