Why are air acetylene, air map, or air propane torches preferred over oxyacetylene torches for soldering copper pipes?
A) They have smaller, more focused flames than oxyacetylene torches.
B) Oxyacetylene temperatures can easily overheat the pipe.
C) They all produce a much hotter flame than oxyacetylene torches.
D) Oxyacetylene torches cannot be used with solder because of the possibility of adverse chemical reactions.
B
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Fill in the blank(s) with the appropriate word(s).
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