Chapter 29 Shielded Metal Arc Welding 817
Copyright Goodheart-Willcox Co., Inc.
3. Engineering. Practice preparing two 4″ × 4″ welding coupons of 3/8″ mild steel plate for
a test groove weld. Bevel each edge at 37.5° and leave a 1/16″ root face. Why are these
measurements and consistency so important in preparing coupons for testing?
4. Math. Use a micrometer or a caliper to measure several different types of electrodes at
the fi ller metal and at the fl ux covering. How uniform is the thickness of the fl ux? What
percentage, by volume, is the fl ux coating compared to the fi ller metal for different types
of electrodes?
5. Social Science. How can you use the Internet and social media to improve your welding
skills? Explore different welding-related websites and social media platforms. Report on
the three you found most helpful and explain the reasons for your choices.
6. Language Arts. The acronym CLAMS helps beginning welders remember important
parameters of welding that they control. Look up this acronym on the Internet. In small
groups, discuss what each letter stands for. Each group member should choose one of the
parameters and explain to the others how controlling it contributes to a quality weld.
Thinking Critically
1. You and a partner are asked to construct a new slatted top for an oxyfuel cutting table
to be used in the lab. Describe your design, including materials, joint types, welding
positions, and electrode selection.
2. When selecting an electrode for a job, one of the considerations is the electrode size
(diameter). In which welding situations is a smaller diameter electrode preferable? In
which welding situations is a larger diameter electrode preferable?