EPA SECTION 608 CORE/117 QUESTIONS AND ANSWERS (A+)

EPA SECTION 608 CORE/117
QUESTIONS AND ANSWERS (A+)
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.

Quiz :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

Quiz :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. Carbon Dioxide

Quiz :Which type of refrigerant typically has the lowest
global warming potential?
a. HCFCs
b. HFOs
c. HFCs
d. All are equal - √Answer :b. HFOs

,Quiz :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

Quiz :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.

Quiz :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. They are
significantly lower.

Quiz :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.

Quiz :Why are HFO refrigerants less flammable than
hydrocarbon refrigerants?
a. They contain chlorine.
b. They contain bromine.
c. They contain fluorine.
d. They contain carbon. - √Answer :c. They contain
fluorine.

Quiz :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

Quiz :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.

Quiz :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. They are
less flammable than hydrocarbon refrigerants, but most
are still mildly flammable.

Quiz :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. 100,000 molecules

Quiz :An example of a CFC refrigerant is:
a. R-134a
b. R-123
c. R-22
d. R-12 - √Answer :d. R-12

Quiz :Which of the following is a HFC refrigerant?
a. R-134a
b. R-115
c. R-22
d. R-11 - √Answer :a. R-134a

Quiz :Which of the following is a high-pressure
refrigerant
under EPA's section 608 regulations?
a. R-410A