Podcast
Questions and Answers
What are slag inclusions in welds?
What are slag inclusions in welds?
- Oxides and other nonmetallic solids found as elongated or multifaceted inclusions (correct)
- Gas bubbles trapped in the weld metal
- Impurities in the molten metal pool
- Metallic solids that are sometimes found as elongated or multifaceted inclusions
Why are stray arc strikes considered more serious?
Why are stray arc strikes considered more serious?
- They may create a quenched and embrittled condition in the weld zone (correct)
- They improve the weld quality
- They have no impact on the weld
- They prevent the formation of slag inclusions
What is the purpose of slag during welding?
What is the purpose of slag during welding?
- To create a protective layer over the weld
- To introduce impurities into the weld
- To serve as scavengers of impurities in the molten metal pool (correct)
- To increase the cooling rate of the weld
Why may repair of stray arc strike damage be difficult and costly?
Why may repair of stray arc strike damage be difficult and costly?
What is one of the factors that can lead to rapid solidification of weld metal?
What is one of the factors that can lead to rapid solidification of weld metal?
What can result from rapid solidification of weld metal?
What can result from rapid solidification of weld metal?
What is a characteristic of slag inclusions in multipass welding?
What is a characteristic of slag inclusions in multipass welding?
What is the consequence of insufficient cleaning between weld passes in multipass welding?
What is the consequence of insufficient cleaning between weld passes in multipass welding?
What type of electrodes designed for out-of-position welding have a fast freezing slag system?
What type of electrodes designed for out-of-position welding have a fast freezing slag system?
What can result from using electrodes designed for out-of-position welding in high-speed welding applications?
What can result from using electrodes designed for out-of-position welding in high-speed welding applications?
What is the consequence of using an electrode that is too large when making a root pass?
What is the consequence of using an electrode that is too large when making a root pass?
What type of NDT methods are capable of detecting below-surface discontinuities such as slag inclusions?
What type of NDT methods are capable of detecting below-surface discontinuities such as slag inclusions?
What is the majority of slag inclusions usually trapped below?
What is the majority of slag inclusions usually trapped below?
What is essential to prevent the majority of slag inclusions?
What is essential to prevent the majority of slag inclusions?
What is the consequence of using the wrong size of electrode when making a root pass?
What is the consequence of using the wrong size of electrode when making a root pass?
What is the importance of the proper choice of electrodes for high-speed welding?
What is the importance of the proper choice of electrodes for high-speed welding?
