EPA 608 CORE EXAM TESTS COMBINED
QUESTIONS AND ANSWERS VERIFIED 100%
CORRECT
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 (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.
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 low global warming
potentials. - ANSWER b. They are less flammable than hydrocarbon
refrigerants, but most are still mildly flammable.
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
An example of a CFC refrigerant is:
a. R-134a
b. R-123
c. R-22
d. R-12 - ANSWER d. R-12
Which of the following is a HFC refrigerant?
a. R-134a
b. R-115
c. R-22
d. R-11 - ANSWER a. R-134a
Which of the following is a high-pressure refrigerant under EPA's
section 608 regulations?
a. R-410A
b. R-113
c. R-123
d. R-11 - ANSWER a. R-410A
Which of these gases help form the earth's protective shield?
a. Methane
b. Radon
c. Stratospheric Ozone
d. Carbon Dioxide - ANSWER c. Stratospheric Ozone
HCFC refrigerants contain which of the following?
, a. Helium, Carbon, Fluorine, & Chlorine
b. Hydrogen, Chlorine, Ferrite, & Carbon
c. Hydrogen, Chlorine, Fluorine, &Carbon
d. Hydrogen, Chlorine, Fluorine, & Calcium - ANSWER c.
Hydrogen, Chlorine, Fluorine, &Carbon
Which of the following refrigerants damages stratospheric
ozone?
a. HFOs
b. HFCs
c. HCFCs
d. Ammonia - ANSWER c. HCFCs
What is the strongest evidence that HCFCs are in the
stratosphere?
a. Chemical reactions predict there should be HCFCs in the upper
atmosphere.
b. Measurement of chlorine in air samples from the lower atmosphere.
c. Measurement of HCFCs in air samples from the stratosphere.
d. Satellite measurements of light passing through the atmosphere. -
ANSWER c. Measurement of HCFCs in air samples from the
stratosphere.
Which of the following statements is true?
a. There is no difference between refrigerant grade hydrocarbon
refrigerant and propane for grills.
b. Propane cylinders for grilling contain impurities that can damage
refrigerant equipment.
c. Refrigerant-grade hydrocarbon refrigerant is of lower quality than
consumer propane cylinders.
QUESTIONS AND ANSWERS VERIFIED 100%
CORRECT
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 (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.
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 low global warming
potentials. - ANSWER b. They are less flammable than hydrocarbon
refrigerants, but most are still mildly flammable.
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
An example of a CFC refrigerant is:
a. R-134a
b. R-123
c. R-22
d. R-12 - ANSWER d. R-12
Which of the following is a HFC refrigerant?
a. R-134a
b. R-115
c. R-22
d. R-11 - ANSWER a. R-134a
Which of the following is a high-pressure refrigerant under EPA's
section 608 regulations?
a. R-410A
b. R-113
c. R-123
d. R-11 - ANSWER a. R-410A
Which of these gases help form the earth's protective shield?
a. Methane
b. Radon
c. Stratospheric Ozone
d. Carbon Dioxide - ANSWER c. Stratospheric Ozone
HCFC refrigerants contain which of the following?
, a. Helium, Carbon, Fluorine, & Chlorine
b. Hydrogen, Chlorine, Ferrite, & Carbon
c. Hydrogen, Chlorine, Fluorine, &Carbon
d. Hydrogen, Chlorine, Fluorine, & Calcium - ANSWER c.
Hydrogen, Chlorine, Fluorine, &Carbon
Which of the following refrigerants damages stratospheric
ozone?
a. HFOs
b. HFCs
c. HCFCs
d. Ammonia - ANSWER c. HCFCs
What is the strongest evidence that HCFCs are in the
stratosphere?
a. Chemical reactions predict there should be HCFCs in the upper
atmosphere.
b. Measurement of chlorine in air samples from the lower atmosphere.
c. Measurement of HCFCs in air samples from the stratosphere.
d. Satellite measurements of light passing through the atmosphere. -
ANSWER c. Measurement of HCFCs in air samples from the
stratosphere.
Which of the following statements is true?
a. There is no difference between refrigerant grade hydrocarbon
refrigerant and propane for grills.
b. Propane cylinders for grilling contain impurities that can damage
refrigerant equipment.
c. Refrigerant-grade hydrocarbon refrigerant is of lower quality than
consumer propane cylinders.
