What is the most characteristic detail of the submerged arc welding process? a) The use of a continuous flow of protective material called flux. b...

The answer is a) The use of a continuous flow of protective material called flux.

Submerged arc welding (SAW) is a type of arc welding that uses a consumable flux to protect the weld from the atmosphere. The flux is added continuously as the weld is being made, which helps to prevent the weld from rusting and also helps to create a smooth, uniform weld bead.

The use of flux is the most characteristic detail of SAW because it is what distinguishes SAW from other arc welding processes. Other arc welding processes, such as gas metal arc welding (GMAW) and flux-cored arc welding (FCAW), do not use flux.

The other options are not correct. SAW does not use a non-consumable electrode, it does not require external flux addition, and it does not require high intensity currents.

Here are some additional details about submerged arc welding:

• SAW is a versatile welding process that can be used for a variety of applications, including welding steel pipes, beams, and plates.
• SAW is a relatively slow process, but it can produce high-quality welds with good mechanical properties.
• SAW is a relatively safe process, but the fumes from the flux can be harmful to the welder's health.

I hope this helps! Let me know if you have other questions.