Podcast
Questions and Answers
What is the main focus of welding in flat position 1G?
What is the main focus of welding in flat position 1G?
- Performing stringer/layered beads
- Observing welding codes on undercut and lack of fusion
- Conducting weld inspection of the finish weldment
- Checking root penetration (correct)
Which factor should a welder check in accordance with acceptable standards?
Which factor should a welder check in accordance with acceptable standards?
- Proper housekeeping
- Weld capping/final pass
- Excessive penetration (correct)
- Cracks in the weldment
What should a welder observe to ensure the weld capping/final pass meets standards?
What should a welder observe to ensure the weld capping/final pass meets standards?
- Undercut (correct)
- Burn-through
- Lack of fusion
- Excessive penetration
Why is it important for a welder to avoid excessive penetration during welding?
Why is it important for a welder to avoid excessive penetration during welding?
Which welding parameter should be maintained within allowable tolerances for weld capping/final pass?
Which welding parameter should be maintained within allowable tolerances for weld capping/final pass?
What may occur if a welder does not observe welding codes and standards for capping/final pass?
What may occur if a welder does not observe welding codes and standards for capping/final pass?
What should a welder write at the beginning of the activity on a separate sheet of paper?
What should a welder write at the beginning of the activity on a separate sheet of paper?
Which section of the activity focuses on the essentials of welding?
Which section of the activity focuses on the essentials of welding?
Why is it essential to consider the type of metal in the selection of electrode?
Why is it essential to consider the type of metal in the selection of electrode?
What happens if a welder travels too fast during welding?
What happens if a welder travels too fast during welding?
Which factor plays a significant role in determining the arc length?
Which factor plays a significant role in determining the arc length?
In welding, why are angles of the electrode important?
In welding, why are angles of the electrode important?
What could be a consequence of using the wrong type of electrode for a particular metal?
What could be a consequence of using the wrong type of electrode for a particular metal?
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Study Notes
Welding Technique Issues
- Improper welding technique can cause unfilled corners, cut into the joint, or incomplete filling of the groove joint
- Wrong electrode angle can result in uneven weld deposition and overlap
- Incorrect amperage, travel speed, and electrode angle can all contribute to poor weld quality
- Using the wrong electrode for the desired joint penetration can lead to defects
- Dirty or painted base metal, strong winds, and moisture can also affect weld quality
Essential Variables of Welding (SMAW)
- There are five essential variables of welding: Current Setting (C), Length of Arc (L), Angle of Electrode (A), Speed of Travel (S), and Selection of Electrode (S)
- These essentials must be controlled to produce a quality weld
- Remember the five essentials by using the word CLASS (Current, Length, Angle, Speed, and Selection)
Importance of Essential Variables
- If these five essentials are not followed, weld discontinuities or defects will occur, such as porosities, overlap, undercut, incomplete fusion, and cracks
- The length of an arc is determined by the size of the electrode
- A narrow weld bead with pointed ripples can result from too slow travel speed
- Welding with too long an arc gap can result in overlapping
- Undercutting can occur if the current is set too high
Arc Length and Electrode Angle
- The arc length required depends on the size of the electrode used and the welding task
- A shorter arc length is required for small-diameter electrodes
- The work angle of an electrode is not approximately 90°
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