Review Questions
Write your answers on a separate sheet of paper. Do
not write in this book.
1. What are the five basic types of joints?
2. Welds made from both sides of the joint are called
_____ welds.
3. _____ welds are often used where dissimilar
materials are joined.
4. Weld material placed on the surface of a joint for
protection of the base material is called _____ or
_____.
5. The oxyacetylene and the plasma arc processes are
_____ cutting processes.
6. Where high-strength welds are required, a _____
joint weld with 100 percent penetration is used.
7. Unless tack welds are made properly, they often
_____ during the welding operation.
8. Fillet welds are always measured by the length of
the fillet _____.
9. Where fillet weld dimensions are not specified, the
size of the weld should equal the thickness of the
_____ material.
10. The condition of a butt joint where neither the top
nor the bottom edge of the material is flush is called
_____.
11. _____ joints always shrink across the weld joint.
12. The main problem in making fillet welds is _____
_____ _____ into the root of the joint.
13. Edge-type joints without full penetration of the weld
should not be used in _____ _____.
14. _____ bars are used during welding to localize and
remove heat from the weld area.
15. The American Welding Society defines four posi-
tions of welding: _____, _____, _____, and _____.
68 Gas Metal Arc Welding Handbook
Wall
thickness
Reinforcement
Heat affected zone
within this area
Figure 6-35. The joint thickness and the filler material tensile
strength is equivalent to the strength of the base material in this
design.
New
weld
Original material Original material
Buttered weld Buttered weld
Figure 6-36. Buttering techniques are commonly used to adapt
dissimilar metals for welding.
Figure 6-37. Temperature crayons and pellets may be used to
determine preheating temperatures prior to welding.
Hold-down and chill bars
Backing and
chill bar
Figure 6-38. Tooling and bars used to remove heat from the
weld and resist heat flow into the base material are sometimes
called “chill bars.”