EPA SECTION 608 CORE CERTIFICATION
EXAM STUDY GUIDE 2026
COMPREHENSIVE PRACTICE QUESTIONS
AND CORRECT ANSWERS WITH DETAILED
RATIONALES REFRIGERANT SAFETY, EPA
REGULATIONS, RECOVERY AND
RECYCLING, LEAK DETECTION, CLEAN AIR
ACT AND HVAC TECHNICIAN EXAM
PREPARATION
Capturing and ultimately eliminating the use of chlorofluorocarbons is: -
CORRECT ANSWER -being done in the United States to stop damage to the
stratospheric ozone layer.
State and local governments may esta What characteristic or characteristics
of CFCs make them more likely than other chlorine compounds to reach the
stratosphere? - CORRECT ANSWER -Dont disolve iin water
Each chlorine atom in the stratosphere can destroy how many ozone
molecules? - CORRECT ANSWER -100,000 ozone molecules
Which refrigerant contains a CFC?
R500, R12, R113 or R11? - CORRECT ANSWER -Theyre all CFC's
,HYDROCHLORIC FLORICCARBON (HCFC) refrigerant contain? -
CORRECT ANSWER -Hydrogen, chlorine, flourine and carbon
Which refrigerant is a chlorine free refrigerant? - CORRECT ANSWER -HFC
R 134A
What is the result damage to the ozone layer? - CORRECT ANSWER -
Increases in human skin cancer
According to the EPA, chlorine in the stratosphere is believed to come
primarily from the CFCs rather than from volcanoes because - CORRECT
ANSWER --) The rise in the amount of chlorine measured in the
stratosphere over the past 2 decades matches the rise of chlorine which has
different natural sources of chlorune overthe same period
-) The rise of chlorine in the statosphere matches the rise in CFCs over the
same period
-) samples of air taken over erupting volcanoes shows that volcanoes
contribute a small amount of chlorine in the stratosphere compared to
CFCs
-) ALL OF THE ABOVE
Which is a violation of the EPA clean air act? - CORRECT ANSWER --)
falsifying or failing to keep required records
-) failing to keep evacuation levels before opening or disposing of
appliances
-) knowingly releasing HFC's, HCFCs or CFC refrigerants
,-) ALL OF THE ABOVE
Discarding of disposable cylinders is accomplished by - CORRECT ANSWER
-Assuring that all refrigerant is recovered and that the cylinders are
rendered useless then recycle the metal
How much money can be awarded to a person who supplies information
leading to a conviction against the technician who is intentionally venting
refrigerants or violatingsome other provision of the EPA CLEAN AIR ACT -
CORRECT ANSWER -$10,000
CFC's will no longer be manufactured or imported into the U.S. after what
year? - CORRECT ANSWER -1995
Since July 1, 1992 it has been illegal to: - CORRECT ANSWER -Knowingly
releasing HCF or HCFC refrigerants in the U.S.
Which compounds are controlled by the Montreal protocol? - CORRECT
ANSWER --) chloric floric carbons
-) hydro chloric carbons
-) halons
-) all of the above
EPA regulations cover all AC and refrigeration equipment when containing
what? - CORRECT ANSWER -Any refrigerant or refrigerant substitute
, The syntetic substitute currently usedwith blends containing HCFCs is: -
CORRECT ANSWER -Alcobenzine
What is the significance of atheotropic mixture: - CORRECT ANSWER -The
mixture combines to act as a single compound refrigerant
Cooling occurs in a vapor compression refrigeration system when: -
CORRECT ANSWER -Refrigerant liquid boils into a vapor
Ozone depletion in the stratosphere is what type of problem: - CORRECT
ANSWER -Its a GLOBAL problem
The definition of recover is: - CORRECT ANSWER -To remove refrigerant in
any condition from a system and store it an external container without
neccesarily testing it
Which of the following leak detection methods is considered by the EPA to
be the effective for locating the general area of small leaks? - CORRECT
ANSWER -Electronic ultrasonic testers
Recovery during low ambient temperatures will: - CORRECT ANSWER -Slow
the recovery process
During dehydration of a refrigeration system the refrigeration system is
heated to: - CORRECT ANSWER -Decrease dehydration time
EXAM STUDY GUIDE 2026
COMPREHENSIVE PRACTICE QUESTIONS
AND CORRECT ANSWERS WITH DETAILED
RATIONALES REFRIGERANT SAFETY, EPA
REGULATIONS, RECOVERY AND
RECYCLING, LEAK DETECTION, CLEAN AIR
ACT AND HVAC TECHNICIAN EXAM
PREPARATION
Capturing and ultimately eliminating the use of chlorofluorocarbons is: -
CORRECT ANSWER -being done in the United States to stop damage to the
stratospheric ozone layer.
State and local governments may esta What characteristic or characteristics
of CFCs make them more likely than other chlorine compounds to reach the
stratosphere? - CORRECT ANSWER -Dont disolve iin water
Each chlorine atom in the stratosphere can destroy how many ozone
molecules? - CORRECT ANSWER -100,000 ozone molecules
Which refrigerant contains a CFC?
R500, R12, R113 or R11? - CORRECT ANSWER -Theyre all CFC's
,HYDROCHLORIC FLORICCARBON (HCFC) refrigerant contain? -
CORRECT ANSWER -Hydrogen, chlorine, flourine and carbon
Which refrigerant is a chlorine free refrigerant? - CORRECT ANSWER -HFC
R 134A
What is the result damage to the ozone layer? - CORRECT ANSWER -
Increases in human skin cancer
According to the EPA, chlorine in the stratosphere is believed to come
primarily from the CFCs rather than from volcanoes because - CORRECT
ANSWER --) The rise in the amount of chlorine measured in the
stratosphere over the past 2 decades matches the rise of chlorine which has
different natural sources of chlorune overthe same period
-) The rise of chlorine in the statosphere matches the rise in CFCs over the
same period
-) samples of air taken over erupting volcanoes shows that volcanoes
contribute a small amount of chlorine in the stratosphere compared to
CFCs
-) ALL OF THE ABOVE
Which is a violation of the EPA clean air act? - CORRECT ANSWER --)
falsifying or failing to keep required records
-) failing to keep evacuation levels before opening or disposing of
appliances
-) knowingly releasing HFC's, HCFCs or CFC refrigerants
,-) ALL OF THE ABOVE
Discarding of disposable cylinders is accomplished by - CORRECT ANSWER
-Assuring that all refrigerant is recovered and that the cylinders are
rendered useless then recycle the metal
How much money can be awarded to a person who supplies information
leading to a conviction against the technician who is intentionally venting
refrigerants or violatingsome other provision of the EPA CLEAN AIR ACT -
CORRECT ANSWER -$10,000
CFC's will no longer be manufactured or imported into the U.S. after what
year? - CORRECT ANSWER -1995
Since July 1, 1992 it has been illegal to: - CORRECT ANSWER -Knowingly
releasing HCF or HCFC refrigerants in the U.S.
Which compounds are controlled by the Montreal protocol? - CORRECT
ANSWER --) chloric floric carbons
-) hydro chloric carbons
-) halons
-) all of the above
EPA regulations cover all AC and refrigeration equipment when containing
what? - CORRECT ANSWER -Any refrigerant or refrigerant substitute
, The syntetic substitute currently usedwith blends containing HCFCs is: -
CORRECT ANSWER -Alcobenzine
What is the significance of atheotropic mixture: - CORRECT ANSWER -The
mixture combines to act as a single compound refrigerant
Cooling occurs in a vapor compression refrigeration system when: -
CORRECT ANSWER -Refrigerant liquid boils into a vapor
Ozone depletion in the stratosphere is what type of problem: - CORRECT
ANSWER -Its a GLOBAL problem
The definition of recover is: - CORRECT ANSWER -To remove refrigerant in
any condition from a system and store it an external container without
neccesarily testing it
Which of the following leak detection methods is considered by the EPA to
be the effective for locating the general area of small leaks? - CORRECT
ANSWER -Electronic ultrasonic testers
Recovery during low ambient temperatures will: - CORRECT ANSWER -Slow
the recovery process
During dehydration of a refrigeration system the refrigeration system is
heated to: - CORRECT ANSWER -Decrease dehydration time
