EPA 608 CORE Exam 2026 Questions
and Answers Graded A+
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
©COPYRIGHT 2026, ALL RIGHTS RESERVED 1
,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
©COPYRIGHT 2026, ALL RIGHTS RESERVED 2
,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
©COPYRIGHT 2026, ALL RIGHTS RESERVED 3
, 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
To determine the safe pressure for leak testing one should use: - Correct answer-
Low side test data plate value
©COPYRIGHT 2026, ALL RIGHTS RESERVED 4
and Answers Graded A+
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
©COPYRIGHT 2026, ALL RIGHTS RESERVED 1
,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
©COPYRIGHT 2026, ALL RIGHTS RESERVED 2
,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
©COPYRIGHT 2026, ALL RIGHTS RESERVED 3
, 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
To determine the safe pressure for leak testing one should use: - Correct answer-
Low side test data plate value
©COPYRIGHT 2026, ALL RIGHTS RESERVED 4
