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EPA SECTION 608 CORE EXAM AND PRACTICE EXAM
LATEST 2025/2026 TEST BANK| COMPLETE 200 REAL
EXAM QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) ALREADY GRADED A+| EPA
SECTION 608 CORE EXAM PREP 2025 (BRAND NEW!!)
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. - Correct Answers - 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 - Correct Answers - 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)
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d. They can have very high global warming potentials. - Correct Answers - 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. - Correct Answers - 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. - Correct Answers - b.
100,000 molecules
An example of a CFC refrigerant is:
a. R-134a
b. R-123
c. R-22
d. R-12 - Correct Answers - d. R-12
Which of the following is a HFC refrigerant?
a. R-134a
b. R-115
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c. R-22
d. R-11 - Correct Answers - 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 - Correct Answers - a. R-410A
Which of these gases help form the earth's protective shield?
a. Methane
b. Radon
c. Stratospheric Ozone
d. Carbon Dioxide - Correct Answers - 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 - Correct Answers - c. Hydrogen, Chlorine,
Fluorine, & Carbon
Which of the following refrigerants damages stratospheric ozone?
a. HFOs
b. HFCs
c. HCFCs
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d. Ammonia - Correct Answers - 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. - Correct Answers -
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.
d. Hydrocarbon refrigerants can be used as a retrofit refrigerant. - Correct Answers - b.
Propane cylinders for grilling contain impurities that can damage refrigerant equipment.
Ozone depletion in the stratosphere is what type
of problem?
a. Local
b. Regional
c. National
d. Global - Correct Answers - d. Global
Which type of refrigerant is the most harmful to stratospheric ozone?
a. CFCs
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EPA SECTION 608 CORE EXAM AND PRACTICE EXAM
LATEST 2025/2026 TEST BANK| COMPLETE 200 REAL
EXAM QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) ALREADY GRADED A+| EPA
SECTION 608 CORE EXAM PREP 2025 (BRAND NEW!!)
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. - Correct Answers - 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 - Correct Answers - 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)
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d. They can have very high global warming potentials. - Correct Answers - 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. - Correct Answers - 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. - Correct Answers - b.
100,000 molecules
An example of a CFC refrigerant is:
a. R-134a
b. R-123
c. R-22
d. R-12 - Correct Answers - d. R-12
Which of the following is a HFC refrigerant?
a. R-134a
b. R-115
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c. R-22
d. R-11 - Correct Answers - 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 - Correct Answers - a. R-410A
Which of these gases help form the earth's protective shield?
a. Methane
b. Radon
c. Stratospheric Ozone
d. Carbon Dioxide - Correct Answers - 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 - Correct Answers - c. Hydrogen, Chlorine,
Fluorine, & Carbon
Which of the following refrigerants damages stratospheric ozone?
a. HFOs
b. HFCs
c. HCFCs
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d. Ammonia - Correct Answers - 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. - Correct Answers -
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.
d. Hydrocarbon refrigerants can be used as a retrofit refrigerant. - Correct Answers - b.
Propane cylinders for grilling contain impurities that can damage refrigerant equipment.
Ozone depletion in the stratosphere is what type
of problem?
a. Local
b. Regional
c. National
d. Global - Correct Answers - d. Global
Which type of refrigerant is the most harmful to stratospheric ozone?
a. CFCs
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