EPA SECTION 608 CORE (2019 REVISION)
|COMPLETE STUDY GUIDE WITH 100% ACCURATE
QUESTIONS &ANSWERS. EXCELLENCE
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. Molecules containing 3
oxygen atoms.
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. R-600a
Which of the following gases is used as the baseline
measurement for global warming potential?
a. Ammonia
b. Carbon Dioxide
c. CFC-12
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,d. Propane Answer: b. Carbon Dioxide
Which type of refrigerant typically has the lowest global warming potential?
a. HCFCs
b. HFOs
c. HFCs
d. All are equal Answer: b. HFOs
What is the state of refrigerant 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 Answer: b. Low pressure superheated vapor
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. It is thousands of times greater.
How do the global warming potentials of isobutane
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,(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. They are significantly lower.
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. Non-ozone
depleting and have low global
warming potentials.
Why are HFO refrigerants less flammable than
hydrocarbon refrigerants?
a. They contain chlorine.
b. They contain bromine.
c. They contain fluorine.
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, d. They contain carbon. Answer: c. They contain fluorine.
Which of the following refrigerants is an HFO?
a. R-1234yf
b. R-123
c. R-134a
d. All three are HFOs Answer: a. R-1234yf
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. They can have
very high global warming
potentials.
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
4
APPHIA - Crafted with Care and Precision for Academic Excellence.
|COMPLETE STUDY GUIDE WITH 100% ACCURATE
QUESTIONS &ANSWERS. EXCELLENCE
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. Molecules containing 3
oxygen atoms.
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. R-600a
Which of the following gases is used as the baseline
measurement for global warming potential?
a. Ammonia
b. Carbon Dioxide
c. CFC-12
1
APPHIA - Crafted with Care and Precision for Academic Excellence.
,d. Propane Answer: b. Carbon Dioxide
Which type of refrigerant typically has the lowest global warming potential?
a. HCFCs
b. HFOs
c. HFCs
d. All are equal Answer: b. HFOs
What is the state of refrigerant 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 Answer: b. Low pressure superheated vapor
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. It is thousands of times greater.
How do the global warming potentials of isobutane
2
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,(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. They are significantly lower.
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. Non-ozone
depleting and have low global
warming potentials.
Why are HFO refrigerants less flammable than
hydrocarbon refrigerants?
a. They contain chlorine.
b. They contain bromine.
c. They contain fluorine.
3
APPHIA - Crafted with Care and Precision for Academic Excellence.
, d. They contain carbon. Answer: c. They contain fluorine.
Which of the following refrigerants is an HFO?
a. R-1234yf
b. R-123
c. R-134a
d. All three are HFOs Answer: a. R-1234yf
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. They can have
very high global warming
potentials.
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
4
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