Exam (elaborations)
HVAC: EPA 608 Certification Study Guide| 100 QUESTIONS| WITH COMPLETE SOLUTIONS
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Are there drop-in replacements for R-12 systems? Why or why not? correct answer: No because the new refrigerants are incompatible with the oils and lubricants used in R-12 systems. What type of oil is used in R-134a and what oils will it mix with? correct answer: Ester based oils and they do n...
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