EPA 608 CORE Test Bank. Over 300 Questions with
correct verified answers. Latest 2024-2025
1. What characteristic or characteristics of CFCs make them more likely than other
chlorine compounds to reach the stratosphere?: Dont disolve iin water
2. Each chlorine atom in the stratosphere can destroy how many ozone molecules?:
100,000 ozone molecules
3. Which refrigerant contains a CFC?
R500, R12, R113 or R11?: Theyre all CFC's
4. HYDROCHLORIC FLORICCARBON (HCFC) refrigerant contain?: Hydrogen,
chlorine, flourine and carbon
5. Which refrigerant is a chlorine free refrigerant?: HFC R 134A
6. What is the result damage to the ozone layer?: Increases in human skin cancer
7. According to the EPA, chlorine in the stratosphere is believed to come primarily
from the CFCs rather than from volcanoes because: -) 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
8. Which is a violation of the EPA clean air act?: -) 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
9. Discarding of disposable cylinders is accomplished by: Assuring that all
refrigerant is recovered and that the cylinders are rendered useless then recycle the metal
10. 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:
$10,000
11. CFC's will no longer be manufactured or imported into the U.S. after what
year?: 1995
12. Since July 1, 1992 it has been illegal to:: Knowingly releasing HCF or HCFC
refrigerants in the U.S.
13. Which compounds are controlled by the Montreal protocol?: -) chloric floric
carbons
-) hydro chloric carbons
-) halons
-) all of the above
14. EPA regulations cover all AC and refrigeration equipment when containing
what?: Any refrigerant or refrigerant substitute
15. The syntetic substitute currently usedwith blends containing HCFCs is::
Alcobenzine
16. What is the significance of atheotropic mixture:: The mixture combines to act
as a single compound refrigerant
17. Cooling occurs in a vapor compression refrigeration system when::
Refrigerant liquid boils into a vapor
, .
18. Ozone depletion in the stratosphere is what type of problem:: Its a GLOBAL
problem
19. The definition of recover is:: To remove refrigerant in any condition from a
system and store it an external container without neccesarily testing it
20. Which of the following leak detection methods is considered by the EPA to be
the effective for locating the general area of small leaks?: Electronic ultrasonic testers
21. Recovery during low ambient temperatures will:: Slow the recovery process 22.
During dehydration of a refrigeration system the refrigeration system is heated to::
Decrease dehydration time
23. To determine the safe pressure for leak testing one should use:: Low side test
data plate value
24. Care should be used to avoid over filling refrigerant storage cylinders
because:: The internal pressure of the cylinders may rise and cause an explosion 25.
When transporting cylinders containing used refrigerants DOT REQUIRES that
you:: attach DOT classification tags
26. What is the significance of an azeotropic mixture?: The mixture combines to
act like a single component refrigerant
27. CF Cs are more likely to reach the stratosphere than other chlorine-
containing compounds because___________.: They are chemically very stable 28.
Chlorofuorocarbons, or CFCs, consist ofwhich of the following chemicals?:
Chlorine, fluorine and carbon
29. Which compound are the most damaging to the stratospheric ozone layer and
have the highest ozone depletion potential rating?: CFCs
30. ________ test methods are assumed by the EPA as the most effective methods
for locating the general area of small leaks.: Electronic and ultrasonic 31. If a
, reclamation company is shipping a cylinder containing mixed refrigerants they may
______.: Agree to destroy the refrigerant but typically a substantial fee is charged
32 One chlorine atom in the stratosphere is capable of destroying how many ozone
molecules?: 100,000 33. ________is a CFC.
A) R-141b
B) R- 134a
C) R-502
D) R-123: R-502
34. HCFC refrigerants cause ____________ damage to the stratospheric ozone
layer in comparison to CFC refrigerants.: Less
35. The system vacuum gauge should be connected __________?: As far as
possible from the vacuum pump.
36. Manufacture of CFCs was banned as of December 31, _______? A) 1994 B)
1995
C) 2000
D) 2010: 1995
37. Positive evidence that CFCs are in the stratosphere comes from ____________?:
Measurements of CFCs in air samples taken from the stratosphere
38. Under EPAs regulations reclaimed refrigerant must meet standards for purity
before it can be resold: ARI 700
39. ________recovery devices are so named because they depend on components of
the system. That is, they capture refrigerant with the assistance of components
in the air conditioning or refrigeration equipment they are emptying: System-
dependent
correct verified answers. Latest 2024-2025
1. What characteristic or characteristics of CFCs make them more likely than other
chlorine compounds to reach the stratosphere?: Dont disolve iin water
2. Each chlorine atom in the stratosphere can destroy how many ozone molecules?:
100,000 ozone molecules
3. Which refrigerant contains a CFC?
R500, R12, R113 or R11?: Theyre all CFC's
4. HYDROCHLORIC FLORICCARBON (HCFC) refrigerant contain?: Hydrogen,
chlorine, flourine and carbon
5. Which refrigerant is a chlorine free refrigerant?: HFC R 134A
6. What is the result damage to the ozone layer?: Increases in human skin cancer
7. According to the EPA, chlorine in the stratosphere is believed to come primarily
from the CFCs rather than from volcanoes because: -) 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
8. Which is a violation of the EPA clean air act?: -) 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
9. Discarding of disposable cylinders is accomplished by: Assuring that all
refrigerant is recovered and that the cylinders are rendered useless then recycle the metal
10. 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:
$10,000
11. CFC's will no longer be manufactured or imported into the U.S. after what
year?: 1995
12. Since July 1, 1992 it has been illegal to:: Knowingly releasing HCF or HCFC
refrigerants in the U.S.
13. Which compounds are controlled by the Montreal protocol?: -) chloric floric
carbons
-) hydro chloric carbons
-) halons
-) all of the above
14. EPA regulations cover all AC and refrigeration equipment when containing
what?: Any refrigerant or refrigerant substitute
15. The syntetic substitute currently usedwith blends containing HCFCs is::
Alcobenzine
16. What is the significance of atheotropic mixture:: The mixture combines to act
as a single compound refrigerant
17. Cooling occurs in a vapor compression refrigeration system when::
Refrigerant liquid boils into a vapor
, .
18. Ozone depletion in the stratosphere is what type of problem:: Its a GLOBAL
problem
19. The definition of recover is:: To remove refrigerant in any condition from a
system and store it an external container without neccesarily testing it
20. Which of the following leak detection methods is considered by the EPA to be
the effective for locating the general area of small leaks?: Electronic ultrasonic testers
21. Recovery during low ambient temperatures will:: Slow the recovery process 22.
During dehydration of a refrigeration system the refrigeration system is heated to::
Decrease dehydration time
23. To determine the safe pressure for leak testing one should use:: Low side test
data plate value
24. Care should be used to avoid over filling refrigerant storage cylinders
because:: The internal pressure of the cylinders may rise and cause an explosion 25.
When transporting cylinders containing used refrigerants DOT REQUIRES that
you:: attach DOT classification tags
26. What is the significance of an azeotropic mixture?: The mixture combines to
act like a single component refrigerant
27. CF Cs are more likely to reach the stratosphere than other chlorine-
containing compounds because___________.: They are chemically very stable 28.
Chlorofuorocarbons, or CFCs, consist ofwhich of the following chemicals?:
Chlorine, fluorine and carbon
29. Which compound are the most damaging to the stratospheric ozone layer and
have the highest ozone depletion potential rating?: CFCs
30. ________ test methods are assumed by the EPA as the most effective methods
for locating the general area of small leaks.: Electronic and ultrasonic 31. If a
, reclamation company is shipping a cylinder containing mixed refrigerants they may
______.: Agree to destroy the refrigerant but typically a substantial fee is charged
32 One chlorine atom in the stratosphere is capable of destroying how many ozone
molecules?: 100,000 33. ________is a CFC.
A) R-141b
B) R- 134a
C) R-502
D) R-123: R-502
34. HCFC refrigerants cause ____________ damage to the stratospheric ozone
layer in comparison to CFC refrigerants.: Less
35. The system vacuum gauge should be connected __________?: As far as
possible from the vacuum pump.
36. Manufacture of CFCs was banned as of December 31, _______? A) 1994 B)
1995
C) 2000
D) 2010: 1995
37. Positive evidence that CFCs are in the stratosphere comes from ____________?:
Measurements of CFCs in air samples taken from the stratosphere
38. Under EPAs regulations reclaimed refrigerant must meet standards for purity
before it can be resold: ARI 700
39. ________recovery devices are so named because they depend on components of
the system. That is, they capture refrigerant with the assistance of components
in the air conditioning or refrigeration equipment they are emptying: System-
dependent
