EPA 608 Universal Exam With 100 Correct Answers 2023
3 views 0 purchase
Course
NU1426
Institution
NU1426
EPA 608 Universal Exam With 100% Correct Answers 2023
What are two factors that, if present, are most likely to lead to an explosion with hydrocarbon refrigerants?
An appliance normally containing more than 50 pounds of R-22 refrigerant was found to have a 35% annual leak rate. After the repair, ...
EPA 608 Universal Exam With 100% Correct
Answers 2023
1). What are two factors that, if present, are most likely to lead to an explosion with
hydrocarbon refrigerants?
Ans: A sufficient concentration of the refrigeration in the space and an ignition source
2). An appliance normally containing more than 50 pounds of r-22 refrigerant was found to
have a 35% annual leak rate. after the repair, how many successful verification tests are
required?
Ans: Two. Performed before the appliance is recharged
3). All appliances must be equipped with a service aperture or process stub which is used
when adding or removing refrigerant from the appliance. what is typically used on small
appliances?
Ans: A straight piece of tubing that is entered using a piercing access valve. Process
Tube
4). What is the primary purpose of a purge unit on a low-pressure chiller?
Ans: Remove non-condensable from the system
5). Which of the following are recommended safe work practices when recovering refrigerants?
Ans: Wear safety eyewear and butyl-lined gloves when connecting/disconnecting
hoses
6). What is the state of the refrigerant leaving the receiver in a refrigeration system?
Ans: High pressure liquid
7). Which of the following repairs would always be considered "major" under epa's regulations?
Ans: Replacement of an evaporator coil
PaperStoc.com Page 1 of 12
, 8). On low-pressure chillers, moisture most frequently enters the refrigeration system through:
Ans: Leaks from areas with gaskets or fittings
9). How would you remove moisture from refrigerant in a system?
Ans: Use a filter drier
10). Where does refrigerant go after it leaves the purge unit of a low-pressure centrifugal
system?
Ans: The evaporator
11). Which refrigerants can be mixed in an appliance?
Ans: Refrigerants cannot be mixed
12). What gas should be used to leak check a system designed for use with r-410a that has been
opened for a major system repair?
Ans: Pressurized nitrogen
13). What is the term for removing refrigerant in any condition from a system and storing it in an
external container without necessarily testing or processing it in any way?
Ans: Recovery
14). What is meant by the term "high efficiency purge unit"?
Ans: Purge units that discharge a low percentage of refrigerant with the air they remove
15). Before beginning a refrigerant recovery procedure, it is always necessary to:
Ans: know the type of refrigerant in the system
16). Which of the following gases is used as the baseline measurement for global warming
potential?
Ans: Carbon Dioxide
PaperStoc.com Page 2 of 12
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 Academik001. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
