NSC Agricultural Technology Welding methods: The table below shows four weldi

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. Illustration NAME OF THE W... show full transcript

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 Welding Defect

96%

114 rated

Answer

Porosity

Step 2

4.1.2 Give the Possible Causes

99%

104 rated

Answer

Blocked nozzle, gas flow too low or too high, welding arc length is too long, moisture in the weld area.

Step 3

4.1.3 Name of Welding Defect

96%

101 rated

Answer

Spatter

Step 4

4.1.4 Give the Possible Causes

98%

120 rated

Answer

Voltage too low, inadequate surface preparation, rusty or dirty metal.

Step 5

4.1.5 Name of Welding Defect

97%

117 rated

Answer

Undercut

Step 6

4.1.6 Give the Possible Causes

97%

121 rated

Answer

Welding speed too fast, incorrect travel angle.

Step 7

4.1.7 Name of Welding Defect

96%

114 rated

Answer

Lack of fusion

Step 8

4.1.8 Give the Possible Causes

99%

104 rated

Answer

Amperage too low, wrong torch angle.

The table below shows four welding defects - NSC Agricultural Technology - Question 4 - 2021 - Paper 1

Worked Solution & Example Answer:The table below shows four welding defects - NSC Agricultural Technology - Question 4 - 2021 - Paper 1

4.1.1 Name of Welding Defect

4.1.2 Give the Possible Causes

4.1.3 Name of Welding Defect

4.1.4 Give the Possible Causes

4.1.5 Name of Welding Defect

4.1.6 Give the Possible Causes

4.1.7 Name of Welding Defect

4.1.8 Give the Possible Causes

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