1 | Page
EPA 608 Universal Certificate Exam | Actual Questions
With Correct Solutions | Latest Update 2026/2027 |
Graded A+ | Assured Pass.
If a refrigerant has an ODP of anything greater than 0, it must contain chlorine,
since it is chlorine that is responsible for destroying ozone. Examples of this
include R-11, which has an ODP of 1 and R-22, which has an ODP of 0.5. They
both contain chlorine. -correct-answer-If a refrigerant has an ODP of 0.5, which of
the following are true?
The refrigerant with the highest global warming potential is R-12, which is a CFC
refrigerant. It has a GWP of 10,900. This means that it retains almost 11,000 times
more than the amount of energy that carbon dioxide would trap in the
atmosphere! -correct-answer-Of the following refrigerants, which one has the
highest global warming potential (GWP)?
10,000-50,000 -correct-answer-R-12 has a GWP in which of the following ranges?
1000-10,000 -correct-answer-R-410a has a GWP in which of the following ranges?
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HFC-410a -correct-answer-R-410a is the same as
None of these. R-290 is greater than none of these refrigerants. Recall that R-290
is propane, which is a hydrocarbon. We mentioned that hydrocarbons, or HCs,
have the lowest GWPs. Answer choices a, b, and c are either HCFC or HFC
refrigerants, which have GWPs in the thousands. -correct-answer-The GWP of
R290 is greater than which of the following? (Select all that apply)
A.
R-410a
B.
R-134a
C.
R-22
D.
None of these
CFC-12 -correct-answer-R-12 is the same as
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HFO-1234yf -correct-answer-R-1234yf is the same as:
R-1234yf has the least GWP. It is an HFO refrigerant and has a GWP of only 4.
correct-answer-Of the following refrigerants, which one has the least global
warming potential (GWP)?
CFC-11 -correct-answer-R-11 is the same as
HFC-134a -correct-answer-R-134a is the same as
Asphyxia -correct-answer-What are the main safety concerns with R-410a?
Refrigerants that are Class 2 and burn slowly -correct-answer-What does the new
subclass (2L) describe?
The highest possible ODP for these refrigerants is 1 for R-11, a CFC refrigerant. The
potential of any refrigerant to deplete the ozone layer is compared to the ODP of
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R-11 and will be lower. -correct-answer-What is highest possible ODP for any CFC,
HCFC, HFC, or HFO refrigerant?
R-441a is a hydrocarbon refrigerant. Hydrocarbons are natural refrigerants and do
not contain chlorine, they do not deplete the ozone layer. So all hydrocarbons
have an ODP of 0. -correct-answer-What is the ODP of R-441a?
1 -correct-answer-Which class refers to a refrigerant that is not flammable at all?
B -correct-answer-Which class refers to a refrigerant with high toxicity?
A.
R-12
B.
R-1234yf
EPA 608 Universal Certificate Exam | Actual Questions
With Correct Solutions | Latest Update 2026/2027 |
Graded A+ | Assured Pass.
If a refrigerant has an ODP of anything greater than 0, it must contain chlorine,
since it is chlorine that is responsible for destroying ozone. Examples of this
include R-11, which has an ODP of 1 and R-22, which has an ODP of 0.5. They
both contain chlorine. -correct-answer-If a refrigerant has an ODP of 0.5, which of
the following are true?
The refrigerant with the highest global warming potential is R-12, which is a CFC
refrigerant. It has a GWP of 10,900. This means that it retains almost 11,000 times
more than the amount of energy that carbon dioxide would trap in the
atmosphere! -correct-answer-Of the following refrigerants, which one has the
highest global warming potential (GWP)?
10,000-50,000 -correct-answer-R-12 has a GWP in which of the following ranges?
1000-10,000 -correct-answer-R-410a has a GWP in which of the following ranges?
,2 | Page
HFC-410a -correct-answer-R-410a is the same as
None of these. R-290 is greater than none of these refrigerants. Recall that R-290
is propane, which is a hydrocarbon. We mentioned that hydrocarbons, or HCs,
have the lowest GWPs. Answer choices a, b, and c are either HCFC or HFC
refrigerants, which have GWPs in the thousands. -correct-answer-The GWP of
R290 is greater than which of the following? (Select all that apply)
A.
R-410a
B.
R-134a
C.
R-22
D.
None of these
CFC-12 -correct-answer-R-12 is the same as
,3 | Page
HFO-1234yf -correct-answer-R-1234yf is the same as:
R-1234yf has the least GWP. It is an HFO refrigerant and has a GWP of only 4.
correct-answer-Of the following refrigerants, which one has the least global
warming potential (GWP)?
CFC-11 -correct-answer-R-11 is the same as
HFC-134a -correct-answer-R-134a is the same as
Asphyxia -correct-answer-What are the main safety concerns with R-410a?
Refrigerants that are Class 2 and burn slowly -correct-answer-What does the new
subclass (2L) describe?
The highest possible ODP for these refrigerants is 1 for R-11, a CFC refrigerant. The
potential of any refrigerant to deplete the ozone layer is compared to the ODP of
, 4 | Page
R-11 and will be lower. -correct-answer-What is highest possible ODP for any CFC,
HCFC, HFC, or HFO refrigerant?
R-441a is a hydrocarbon refrigerant. Hydrocarbons are natural refrigerants and do
not contain chlorine, they do not deplete the ozone layer. So all hydrocarbons
have an ODP of 0. -correct-answer-What is the ODP of R-441a?
1 -correct-answer-Which class refers to a refrigerant that is not flammable at all?
B -correct-answer-Which class refers to a refrigerant with high toxicity?
A.
R-12
B.
R-1234yf
