8.5 Chapter Conclusion
David Ridge
Summary
This chapter took a deeper look at the SMAW process. It covered some of the history of SMAW’s development over the last hundred or so years. We took a close look at the components necessary for the process, and how to set up and adjust the welding machine. We learned about the filler metal classification system for cover metal electrodes. The material also covered some basic principles of welding with SMAW and safety considerations common to working with this process.
SMAW is a robust process that still finds a place in the welding and fabrication industry today. It takes patience, practice, and skill to weld with this process. Understanding the fundamental aspects of this process will help you become proficient and perform quality work.
Review Questions
- What are three areas of the welding industry where SMAW is still used today?
- List the components of a SMAW system.
- What is the most important control on a SMAW power source?
- Voltage
- Amperage
- Wattage
- Travel speed
- In the electrode classification E7018, which numbers indicate the tensile strength of the weld? What would the tensile strength be for this electrode?
- In the electrode classification E7024, the third number indicates that this electrode can be used in what welding positions?
- All positions
- Flat position only
- Flat and horizontal fillets only
- Vertical down only
- What is the acronym used to help new welders remember good welding technique? What does each letter of the acronym stand for? Explain why each item helps you learn welding basics.
- A weld bead that is narrow with a high crown and little penetration indicates that the amperage setting may be:
- Too high
- Too low
- Just right
- Set on AC instead of DC
- In general, the correct arc length for each SMAW welding electrode is said to be:
- One-eighth of an inch
- One-quarter of an inch
- As close to the base metal as possible
- Equal to the electrode diameter
- Work angle is the angle of the welding rod in relation to the direction the weld is progressing.
- True
- False
- A travel speed that is too fast can cause undercut at the edges of the weld.
- True
- False
- Why is being able to clearly see the weld pool important?
- Imagine you are welding on a small workpiece placed on a table at waist height in front of you. Describe what would make for a comfortable welding position.
- Why should you never set an electrode holder down with an electrode still in it?
- Why is fatigue a factor when it comes to welding safety?