HVAC: EPA 608 Certification Study Guide | 100 Questions with 100% Correct Answers | Verified | Latest Update 2024
Are there drop-in replacements for R-12 systems? Why or why not? - 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? - Ester based oils and they do not mix with other oils What type of lubricant is used with HCFCs? - Alkylbenzene lubricant What is difference b/w ternary blend a azeotropic blend? - Ternary blends are three-part mixtures whereas azeotropic blends are blends of two or more compounds that act like a single compound. What is the trait of a hygroscopic lubricant? - It absorbs (takes on) moisture What is temperature glide and what type of blend won't have it? -
Escuela, estudio y materia
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- HVAC: EPA 608 Certification
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- HVAC: EPA 608 Certification
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- Subido en
- 16 de enero de 2024
- Número de páginas
- 11
- Escrito en
- 2023/2024
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- Examen
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hvac epa 608 certification study guide 100 ques
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