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