The table below shows four welding defects - NSC Agricultural Technology - Question 4 - 2021 - Paper 1
Question 4
The table below shows four welding defects. Redraw the table in your ANSWER BOOK and write down the answers to QUESTIONS 4.1.1 to 4.1.8.
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Worked Solution & Example Answer:The table below shows four welding defects - NSC Agricultural Technology - Question 4 - 2021 - Paper 1
Step 1
4.1.1 Name of the Welding Defect
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Porosity
Spatter
Under-cut
Lack of fusion
Step 2
4.1.2 Give the Possible Causes
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Porosity: Blocked nozzle, gas flow too low, or slag trapped in the weld.
Spatter: Voltage too low, inappropriate electrode angle, or rusty workpiece surface.
Under-cut: Welding speed too fast, improper technique, or poor travel angle.
Lack of fusion: Insufficient amperage, wrong travel speed, or improper angle.
Step 3
4.1.3
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Refer to the above answer for corresponding defect.
Step 4
4.1.4
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Refer to the above answer for corresponding defect.
Step 5
4.1.5
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Refer to the above answer for corresponding defect.
Step 6
4.1.6
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Refer to the above answer for corresponding defect.
Step 7
4.1.7
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Refer to the above answer for corresponding defect.
Step 8
4.1.8
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Refer to the above answer for corresponding defect.
