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HVAC NATE Heat Pump Questions with Correct Answers Graded A+
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HVAC NATE Heat Pump Questions with Correct Answers Graded A+ On an R-22 system, line diameters and lengths are typically specified for a vapor pressure drop that does not exceed what? -Ans 6-7PSI or 6F What is the primary purpose of using flux when soldering copper or brass parts? -Ans Preven...
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