1|Page
EPA 608 UNIVERSAL CERTIFICATE EXAM |
ACTUAL QUESTIONS WITH VERIFIED
DETAILED ANSWERS
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)?
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
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10,000-50,000 -correct-answer-R-12 has a GWP in which of the following ranges?
CFC-12 -correct-answer-R-12 is the same as
HFO-1234yf -correct-answer-R-1234yf is the same as:
HFC-134a -correct-answer-R-134a is the same as
1000-10,000 -correct-answer-R-410a has a GWP in which of the following ranges?
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 R-
290 is greater than which of the following? (Select all that apply)
,3|Page
A.
R-410a
B.
R-134a
C.
R-22
D.
None of these
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?
0. If a refrigerant does not contain chlorine and does not destroy ozone, it has an
ozone depletion potential (ODP) of 0. -correct-answer-What is the least possible
ODP for a 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?
R-600a is isobutane, which is a natural refrigerant. Since natural refrigerants do
not contain chlorine, they do not deplete the ozone layer. So their ODP is 0. -
correct-answer-What is the ODP of R-600a?
2 -correct-answer-Which class refers to a refrigerant that has low flammability?
1 -correct-answer-Which class refers to a refrigerant that is not flammable at all?
EPA 608 UNIVERSAL CERTIFICATE EXAM |
ACTUAL QUESTIONS WITH VERIFIED
DETAILED ANSWERS
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)?
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
,2|Page
10,000-50,000 -correct-answer-R-12 has a GWP in which of the following ranges?
CFC-12 -correct-answer-R-12 is the same as
HFO-1234yf -correct-answer-R-1234yf is the same as:
HFC-134a -correct-answer-R-134a is the same as
1000-10,000 -correct-answer-R-410a has a GWP in which of the following ranges?
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 R-
290 is greater than which of the following? (Select all that apply)
,3|Page
A.
R-410a
B.
R-134a
C.
R-22
D.
None of these
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?
0. If a refrigerant does not contain chlorine and does not destroy ozone, it has an
ozone depletion potential (ODP) of 0. -correct-answer-What is the least possible
ODP for a 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?
R-600a is isobutane, which is a natural refrigerant. Since natural refrigerants do
not contain chlorine, they do not deplete the ozone layer. So their ODP is 0. -
correct-answer-What is the ODP of R-600a?
2 -correct-answer-Which class refers to a refrigerant that has low flammability?
1 -correct-answer-Which class refers to a refrigerant that is not flammable at all?
