AZ ROC C-77 Plumbing Including Solar (Commercial) Practice Questions - Arizona ROC C-77 CR-77 Plumbing Including Solar (Commercial) Examination Exam

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Under the International Solar Energy Code (ISPC) and Uniform Plumbing Code (UPC), which heat transfer fluid is classified as non-toxic and permitted in single-wall heat exchangers connected to potable water?

USP grade propylene glycol / water solution Industrial ethylene glycol antifreeze solution Mineral oil heat transfer fluid Aromatic hydrocarbon heat exchange liquid

Correct Answer:

USP grade propylene glycol / water solution

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