____ weld faces tend to trap slag along the toe of the weld.
A. Concave
B. Flat
C. Dirty
D. Convex
Answer: D
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Changing the torch angle changes the percentage of heat that is transferred into the metal.
Answer the following statement true (T) or false (F)
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Certain elements, like silicon, generate magnetic fields that have strong attractive and repulsive forces
Indicate whether the statement is true or false.
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Explain how grain?boundary precipitation can lead to the formation of precipitation?free zones. Prescribe a heat treatment schedule to eliminate or minimize grain boundary precipitates.
What will be an ideal response?
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Technician A says R-12 is a chlorofluorocarbon (CFC) that damages Earth’s ozone layer. Technician B says R-134a is a hydrofluorocarbon (HFC) that causes even greater damage. Who is correct?
a.
b.
c.
d.
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