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 components A–G. 6.1.3 What is the purpose of the gas during the welding process? 6.2 Name TWO causes of each of the following welding defects: 6.2.1 Slag inclusion. 6.2.2 Undercutting. 6.3 State TWO measures to prevent the following weld defects: 6.3.1 Lack of fusion. 6.3.2 Weld craters. 6.4 Explain how you will conduct a dye penetration test on a welded joint.

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FIGURE 6.1 shows components of welding equipment - English General - 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 - English General - 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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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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Answer

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.

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