EPA SECTION 608 CORE (2019 REVISION) |COMPLETE STUDY GUIDE
WITH 100% ACCURATE QUESTIONS &ANSWERS PASS
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What does ozone in the 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 - (ANSWER)B
Which of the following refrigerants has the lowest global warming potential?
a. R-134a
b. R-407C
c. R-410A
d. R-600a - (ANSWER)D
Which of the following gases is used as the baseline measurement for global warming potential?
a. Ammonia
b. Carbon Dioxide
c. CFC-12
d. Propane - (ANSWER)B
Which type of refrigerant typically has the lowest global warming potential?
a. HCFCs
b. HFOs
c. HFCs
d. All are equal - (ANSWER)B
What is the state of refrigerant entering the compressor of a refrigeration system?
a. Low pressure subcooled liquid
,EPA SECTION 608 CORE (2019 REVISION) |COMPLETE STUDY GUIDE
WITH 100% ACCURATE QUESTIONS &ANSWERS PASS
GUARANTEED
b. Low pressure superheated vapor
c. High pressure subcooled liquid
d. High pressure subcooled vapor - (ANSWER)B
How does the global warming 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. - (ANSWER)D
How do the global warming 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. - (ANSWER)B
What are the characteristics of hydrofluoroolefins (HFOs)?
a. Non-ozone depleting and have high global warming potentials.
b. Non-ozone depleting and have low global warming potentials.
c. Ozone depleting and have high global warming potentials.
d. Ozone depleting and have low global warming potentials. - (ANSWER)B
Why are HFO refrigerants less flammable than hydrocarbon refrigerants?
a. They contain chlorine.
b. They contain bromine.
c. They contain fluorine.
, EPA SECTION 608 CORE (2019 REVISION) |COMPLETE STUDY GUIDE
WITH 100% ACCURATE QUESTIONS &ANSWERS PASS
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d. They contain carbon. - (ANSWER)C
Which of the following refrigerants is an HFO?
a. R-1234yf
b. R-123
c. R-134a
d. All three are HFOs - (ANSWER)A
What characteristics of HFC refrigerants make them damaging 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. - (ANSWER)D
Why are some of the hydrofluoroolefins classified as A2L?
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. - (ANSWER)B
How many ozone molecules can each 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. - (ANSWER)B
WITH 100% ACCURATE QUESTIONS &ANSWERS PASS
GUARANTEED
What does ozone in the 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 - (ANSWER)B
Which of the following refrigerants has the lowest global warming potential?
a. R-134a
b. R-407C
c. R-410A
d. R-600a - (ANSWER)D
Which of the following gases is used as the baseline measurement for global warming potential?
a. Ammonia
b. Carbon Dioxide
c. CFC-12
d. Propane - (ANSWER)B
Which type of refrigerant typically has the lowest global warming potential?
a. HCFCs
b. HFOs
c. HFCs
d. All are equal - (ANSWER)B
What is the state of refrigerant entering the compressor of a refrigeration system?
a. Low pressure subcooled liquid
,EPA SECTION 608 CORE (2019 REVISION) |COMPLETE STUDY GUIDE
WITH 100% ACCURATE QUESTIONS &ANSWERS PASS
GUARANTEED
b. Low pressure superheated vapor
c. High pressure subcooled liquid
d. High pressure subcooled vapor - (ANSWER)B
How does the global warming 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. - (ANSWER)D
How do the global warming 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. - (ANSWER)B
What are the characteristics of hydrofluoroolefins (HFOs)?
a. Non-ozone depleting and have high global warming potentials.
b. Non-ozone depleting and have low global warming potentials.
c. Ozone depleting and have high global warming potentials.
d. Ozone depleting and have low global warming potentials. - (ANSWER)B
Why are HFO refrigerants less flammable than hydrocarbon refrigerants?
a. They contain chlorine.
b. They contain bromine.
c. They contain fluorine.
, EPA SECTION 608 CORE (2019 REVISION) |COMPLETE STUDY GUIDE
WITH 100% ACCURATE QUESTIONS &ANSWERS PASS
GUARANTEED
d. They contain carbon. - (ANSWER)C
Which of the following refrigerants is an HFO?
a. R-1234yf
b. R-123
c. R-134a
d. All three are HFOs - (ANSWER)A
What characteristics of HFC refrigerants make them damaging 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. - (ANSWER)D
Why are some of the hydrofluoroolefins classified as A2L?
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. - (ANSWER)B
How many ozone molecules can each 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. - (ANSWER)B
