Welding Defects and Remedies Quiz
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Questions and Answers

What is a possible cause of lack of penetration in welding?

  • Arc length too long
  • Excessive heat input
  • Voltage too low
  • Improper joint penetration (correct)

    • Which corrective action can be taken to address burn through?

  • Select lower amperage (correct)
  • Use a larger electrode
  • Increase travel speed
  • Reduce arc length

    • What is one way to manage distortion during the welding process?

  • Weld with a longer electrode
  • Increase voltage significantly
  • Maximize travel speed
  • Use restraint clamp (correct)

    • Which of the following is NOT a corrective action for high voltage/amperage issues?

    <p>Increase arc length</p> Signup and view all the answers

    What is a likely cause for excessive heat input in welding?

    <p>Incorrect travel speed</p> Signup and view all the answers

    What defines welding defects?

    <p>Weld surface irregularities and imperfections.</p> Signup and view all the answers

    What is porosity in welding?

    <p>Small cavities or holes in the weld metal.</p> Signup and view all the answers

    Which corrective action is recommended for reducing porosity caused by a long arc length?

    <p>Reduce the arc length.</p> Signup and view all the answers

    What can cause excessive spatter in welding?

    <p>Voltage or amperage being too high for the electrode.</p> Signup and view all the answers

    Which of the following is a corrective action for excessive spatter due to high voltage?

    <p>Decrease amperage or select a larger electrode.</p> Signup and view all the answers

    What is a corrective action to reduce distortion in welding?

    <p>Weld in small segments and allow cooling between welds.</p> Signup and view all the answers

    Which of the following is a possible cause of incomplete fusion in welding?

    <p>Workpiece dirty.</p> Signup and view all the answers

    What corrective action can be taken to address excessive penetration in welds?

    <p>Select lower amperage.</p> Signup and view all the answers

    Which factor is NOT a cause of excessive heat input in welding?

    <p>Lower travel speeds.</p> Signup and view all the answers

    What is a recommended action to prevent incomplete fusion?

    <p>Hold the arc on the groove side walls when using the weaving technique.</p> Signup and view all the answers

    Study Notes

    Welding Defects, Causes, and Remedies

    • Welding defects are surface irregularities, discontinuities, or inconsistencies in welded parts.
    • Defects can lead to rejection of parts, costly repairs, and reduced performance.
    • In extreme cases, catastrophic failures with loss of property and life are possible.

    Porosity

    • Possible Causes:

      • Arc length too long
      • Work piece dirty
      • Damp electrode

    • Corrective Actions:

      • Reduce arc length
      • Remove grease, oil, rust, paint, coating, slag & dirt from work surface before welding.
      • Use dry electrode

    Excessive Spatter

    • Possible Causes:

      • Voltage too high amperage too high for electrode
      • Arc length too long or voltage too high

    • Corrective Actions:

      • Decrease amperage or select larger electrode
      • Reduce arc length or voltage

    Lack of Penetration

    • Possible Causes:

      • Improper joint penetration
      • Improper weld technique
      • Insufficient heat input

    • Corrective Actions:

      • Material too thick, joint penetration & design must provide access to bottom of groove
      • Keep arc on leading of weld puddle
      • Reduce travel speed/increase amperage, select larger electrode & increase amperage

    Burn Through

    • Possible Causes:

      • Excessive heat input

    • Corrective Actions:

      • Select lower amperage, use smaller electrode
      • Increase/ maintain steady travel speed

    Distortion

    • Possible Causes:

      • Excessive heat input

    • Corrective Actions:

      • Use restraint clamp to hold base metal in position
      • Make tack weld along joint before starting weld operations
      • Predict anticipated weld distortion & pre camber base metal
      • Select lower amperage for electrode
      • Increase travel speed
      • Weld in small segments & allow cooling between welds

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    Description

    Test your knowledge on common welding defects, their causes, and corrective actions. This quiz covers various issues such as porosity, excessive spatter, and lack of penetration, providing insights into maintaining weld quality. Perfect for students and professionals in the welding field.

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