____ 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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