HVAC: EPA 608 Certification Study Guide with Complete Solutions
1 view 0 purchase
Course
EPA 608
Institution
EPA 608
HVAC: EPA 608 Certification Study
Guide with Complete Solutions
Are there drop-in replacements for R-12 systems? Why or why not? - Answer️️ -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 ...
HVAC: EPA 608 Certification Study
Guide with Complete Solutions
Are there drop-in replacements for R-12 systems? Why or why not? - 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? - Answer✔️✔️-Ester
based oils and they do not mix with other oils
What type of lubricant is used with HCFCs? - Answer✔️✔️-Alkylbenzene lubricant
What is difference b/w ternary blend a azeotropic blend? - Answer✔️✔️-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? - Answer✔️✔️-It absorbs (takes on) moisture
What is temperature glide and what type of blend won't have it? - Answer✔️✔️-Temp.
blend is the difference between the dew point and the bubble point
Dew Point - Answer✔️✔️-Occurs when saturation temp in evaporator causes refrigerant
to change from liquid to vapor
Bubble Point - Answer✔️✔️-Occurs when saturation temp in condenser changes
refrigerant from vapor to liquid
Page | 1
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller SophiaBennett. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.
