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HVAC: EPA 608 Certification Exam With 100% Correct Answers 2023
- Vak
- Instelling
Are there drop-in replacements for R-12 systems? Why or why not? - Correct answerNo because the new refrigerants are incompatible with the oils and lubricants used in R12 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 not ...
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