3/9/26, 11:14
AM
EPA SECTION 608 CORE 2026 EXAM WITH COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)/GRADE A+ ASSURED
What does ozone in the b. Molecules containing 3 oxygen atoms.
stratosphere above the earth
consist of?
a. Molecules containing 2 oxygen
atoms.
b. Molecules containing 3 oxygen
atoms.
c. Molecules containing 4 oxygen
atoms.
d. Molecules containing 5 oxygen
atoms
Which of the following refrigerants d. R-600a
has the lowest global warming
potential?
a. R-134a
b. R-407C
c. R-410A
d. R-600a
Which of the following gases is used b. Carbon Dioxide
as the baseline measurement for
global warming potential?
a. Ammonia
b. Carbon Dioxide
c. CFC-12
d. Propane
Which type of refrigerant typically b. HFOs
has the lowest global warming
potential?
a. HCFCs
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b. HFOs
c. HFCs
d. All are equal
What is the state of refrigerant b. Low pressure superheated vapor
entering the compressor of a
refrigeration system?
a. Low pressure subcooled liquid
b. Low pressure superheated vapor
c. High pressure subcooled liquid
d. High pressure subcooled vapor
How does the global warming d. It is thousands of times greater.
potential of R-410A compare to
that of carbon dioxide?
a. It is lower.
b. They are equal.
c. It is hundreds of times greater.
d. It is thousands of times greater.
How do the global warming b. They are significantly lower.
potentials of isobutane (R-600a),
propane (R-290), and R-441A
compare to the GWPs of HFC-
134a, R404A, and R-410A?
a.They are significantly higher.
b. They are significantly lower.
c. They are approximately equal
d. They are slightly higher.
What are the characteristics of b. Non-ozone depleting and
hydrofluoroolefins (HFOs)? have low global warming
a. Non-ozone depleting and have potentials.
high global warming potentials.
b. Non-ozone depleting and have
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,3/9/26, 11:14
AM
low global warming potentials.
c. Ozone depleting and have high
global warming potentials.
d. Ozone depleting and have
low global warming potentials.
Why are HFO refrigerants less c. They contain fluorine.
flammable than hydrocarbon
refrigerants?
a.They contain chlorine.
b. They contain bromine.
c. They contain fluorine.
d. They contain carbon.
Which of the following refrigerants is a. R-1234yf
an HFO?
a. R-1234yf
b. R-123
c. R-134a
d. All three are HFOs
What characteristics of HFC d. They can have very high global
refrigerants make them damaging warming potentials.
to the environment?
a.They are toxic to plants and animals
at low doses.
b. They contain chlorine which
damages the ozone layer.
c. They have high Ozone Depletion
Potential (ODP)
d. They can have very high global
warming potentials.
Why are some of the b. They are less flammable than hydrocarbon
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hydrofluoroolefins classified as A2L? refrigerants, but most are still mildly flammable.
a.They have toxicity characteristics.
b. They are less flammable
than hydrocarbon
refrigerants, but most are still
mildly flammable.
c. They are prohibited for use in the
U.S.
d. They have ozone depleting
potentials and have low global
warming potentials.
How many ozone molecules can each b. 100,000 molecules
chlorine atom in the stratosphere
destroy?
a. 1,000 molecules
b. 100,000 molecules
c. 100,000,000 molecules
d. None. Chlorine is not the element
in refrigerant that harms ozone.
An example of a CFC refrigerant is: d. R-12
a. R-134a
b. R-123
c. R-22
d. R-12
Which of the following is a HFC a. R-134a
refrigerant?
a. R-134a
b. R-115
c. R-22
d. R-11
Which of the following is a high- a. R-410A
https://quizlet.com/427815025/epa-section-608-core-2019-revision- 4/33
flash-cards/
AM
EPA SECTION 608 CORE 2026 EXAM WITH COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)/GRADE A+ ASSURED
What does ozone in the b. Molecules containing 3 oxygen atoms.
stratosphere above the earth
consist of?
a. Molecules containing 2 oxygen
atoms.
b. Molecules containing 3 oxygen
atoms.
c. Molecules containing 4 oxygen
atoms.
d. Molecules containing 5 oxygen
atoms
Which of the following refrigerants d. R-600a
has the lowest global warming
potential?
a. R-134a
b. R-407C
c. R-410A
d. R-600a
Which of the following gases is used b. Carbon Dioxide
as the baseline measurement for
global warming potential?
a. Ammonia
b. Carbon Dioxide
c. CFC-12
d. Propane
Which type of refrigerant typically b. HFOs
has the lowest global warming
potential?
a. HCFCs
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flash-cards/
,3/9/26, 11:14
AM
b. HFOs
c. HFCs
d. All are equal
What is the state of refrigerant b. Low pressure superheated vapor
entering the compressor of a
refrigeration system?
a. Low pressure subcooled liquid
b. Low pressure superheated vapor
c. High pressure subcooled liquid
d. High pressure subcooled vapor
How does the global warming d. It is thousands of times greater.
potential of R-410A compare to
that of carbon dioxide?
a. It is lower.
b. They are equal.
c. It is hundreds of times greater.
d. It is thousands of times greater.
How do the global warming b. They are significantly lower.
potentials of isobutane (R-600a),
propane (R-290), and R-441A
compare to the GWPs of HFC-
134a, R404A, and R-410A?
a.They are significantly higher.
b. They are significantly lower.
c. They are approximately equal
d. They are slightly higher.
What are the characteristics of b. Non-ozone depleting and
hydrofluoroolefins (HFOs)? have low global warming
a. Non-ozone depleting and have potentials.
high global warming potentials.
b. Non-ozone depleting and have
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,3/9/26, 11:14
AM
low global warming potentials.
c. Ozone depleting and have high
global warming potentials.
d. Ozone depleting and have
low global warming potentials.
Why are HFO refrigerants less c. They contain fluorine.
flammable than hydrocarbon
refrigerants?
a.They contain chlorine.
b. They contain bromine.
c. They contain fluorine.
d. They contain carbon.
Which of the following refrigerants is a. R-1234yf
an HFO?
a. R-1234yf
b. R-123
c. R-134a
d. All three are HFOs
What characteristics of HFC d. They can have very high global
refrigerants make them damaging warming potentials.
to the environment?
a.They are toxic to plants and animals
at low doses.
b. They contain chlorine which
damages the ozone layer.
c. They have high Ozone Depletion
Potential (ODP)
d. They can have very high global
warming potentials.
Why are some of the b. They are less flammable than hydrocarbon
https://quizlet.com/427815025/epa-section-608-core-2019-revision- 3/33
flash-cards/
, 3/9/26, 11:14
AM
hydrofluoroolefins classified as A2L? refrigerants, but most are still mildly flammable.
a.They have toxicity characteristics.
b. They are less flammable
than hydrocarbon
refrigerants, but most are still
mildly flammable.
c. They are prohibited for use in the
U.S.
d. They have ozone depleting
potentials and have low global
warming potentials.
How many ozone molecules can each b. 100,000 molecules
chlorine atom in the stratosphere
destroy?
a. 1,000 molecules
b. 100,000 molecules
c. 100,000,000 molecules
d. None. Chlorine is not the element
in refrigerant that harms ozone.
An example of a CFC refrigerant is: d. R-12
a. R-134a
b. R-123
c. R-22
d. R-12
Which of the following is a HFC a. R-134a
refrigerant?
a. R-134a
b. R-115
c. R-22
d. R-11
Which of the following is a high- a. R-410A
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