EPA 608 Core Test Sample Exam 2026
Questions and Answers
As of what date did it become unlawful to release Class 1 and Class II
refrigerants to the atmosphere?
a. July 1, 1992
b. July 1, 1993
c. November 14, 1994
d. January 1, 1996 - Correct answer-a. July 1, 1992
What is the ozone layer and why is it important to us on Earth?
a. Thin layer of R-22 in the atmosphere that filters UV.
b. Protective shield for Earth from the sun's harmful ultraviolent (UV)
rays in the stratosphere layer that extends about 6 to 30 miles above
earth
c. Thin layer of CFC and HCFC in the atmosphere that filters UV.
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,d. Protective layer that shields UV in the Troposphere - Correct answer-b.
Protective shield for Earth from the sun's harmful ultraviolent (UV)
rays in the stratosphere layer that extends about 6 to 30 miles above
earth
The atom found in CFC and HCFC refrigerants that destroys ozone in the
stratosphere is?
a. Fluorine
b. Carbon
c. Hydrogen
d. Chlorine - Correct answer-d. Chlorine
What is an ozone molecule made of?
a. Refrigerant
b. Ammonia
c. Three oxygen atoms (O3).
d. Oxygen and ammonia. - Correct answer-Three oxygen atoms (O3).
Which refrigerant is a CFC?
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,a. R-134A
b. R-123
c. R-22
d. R-12 - Correct answer-d. R-12
What is the name of the atom that attacks ozone molecules?
a. CFC atoms
b. HCFC atoms
c. Chlorine and bromine atoms emitted into the atmosphere
d. a and b - Correct answer-c. Chlorine and bromine atoms emitted into the
atmosphere
Which refrigerant is a HFC?
a. R-134A
b. R-123
c. R-22
d. R-12 - Correct answer-a. R-134A
Describe how one Chlorine atom can destroy 100,000 ozone molecules.
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, a. Chlorine releases one of the oxygen atoms and forms two O2 oxygen
molecules, leaving the chlorine molecule free to attack another
ozone molecule and repeat the process.
b. Chlorine locks up the ozone molecule and then and then goes after
another.
c. Chlorine converts the ozone to bromine and then attacks more ozone
molecules.
d. Chlorine can bleach 100,000 ozone molecules before it weakens. - Correct
answer-a. Chlorine releases one of the oxygen atoms and forms two O2 oxygen
molecules, leaving the chlorine molecule free to attack another
ozone molecule and repeat the process.
Which refrigerant contains no chlorine?
a. R-134A
b. R-123
c. R-22
d. R-12 - Correct answer-a. R-134A
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Questions and Answers
As of what date did it become unlawful to release Class 1 and Class II
refrigerants to the atmosphere?
a. July 1, 1992
b. July 1, 1993
c. November 14, 1994
d. January 1, 1996 - Correct answer-a. July 1, 1992
What is the ozone layer and why is it important to us on Earth?
a. Thin layer of R-22 in the atmosphere that filters UV.
b. Protective shield for Earth from the sun's harmful ultraviolent (UV)
rays in the stratosphere layer that extends about 6 to 30 miles above
earth
c. Thin layer of CFC and HCFC in the atmosphere that filters UV.
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,d. Protective layer that shields UV in the Troposphere - Correct answer-b.
Protective shield for Earth from the sun's harmful ultraviolent (UV)
rays in the stratosphere layer that extends about 6 to 30 miles above
earth
The atom found in CFC and HCFC refrigerants that destroys ozone in the
stratosphere is?
a. Fluorine
b. Carbon
c. Hydrogen
d. Chlorine - Correct answer-d. Chlorine
What is an ozone molecule made of?
a. Refrigerant
b. Ammonia
c. Three oxygen atoms (O3).
d. Oxygen and ammonia. - Correct answer-Three oxygen atoms (O3).
Which refrigerant is a CFC?
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,a. R-134A
b. R-123
c. R-22
d. R-12 - Correct answer-d. R-12
What is the name of the atom that attacks ozone molecules?
a. CFC atoms
b. HCFC atoms
c. Chlorine and bromine atoms emitted into the atmosphere
d. a and b - Correct answer-c. Chlorine and bromine atoms emitted into the
atmosphere
Which refrigerant is a HFC?
a. R-134A
b. R-123
c. R-22
d. R-12 - Correct answer-a. R-134A
Describe how one Chlorine atom can destroy 100,000 ozone molecules.
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, a. Chlorine releases one of the oxygen atoms and forms two O2 oxygen
molecules, leaving the chlorine molecule free to attack another
ozone molecule and repeat the process.
b. Chlorine locks up the ozone molecule and then and then goes after
another.
c. Chlorine converts the ozone to bromine and then attacks more ozone
molecules.
d. Chlorine can bleach 100,000 ozone molecules before it weakens. - Correct
answer-a. Chlorine releases one of the oxygen atoms and forms two O2 oxygen
molecules, leaving the chlorine molecule free to attack another
ozone molecule and repeat the process.
Which refrigerant contains no chlorine?
a. R-134A
b. R-123
c. R-22
d. R-12 - Correct answer-a. R-134A
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