EPA 608 CORE STUDY QUESTIONS AND ANSWERS
What characteristic or characteristics of CFCs make them more likely than other chlorine
compounds to reach the stratosphere? - ANSWER Dont disolve iin water
Each chlorine atom in the stratosphere can destroy how many ozone molecules? -
ANSWER 100,000 ozone molecules
Which refrigerant contains a CFC?
R500, R12, R113 or R11? - ANSWER Theyre all CFC's
HYDROCHLORIC FLORICCARBON (HCFC) refrigerant contain? - ANSWER Hydrogen,
chlorine, flourine and carbon
Which refrigerant is a chlorine free refrigerant? - ANSWER HFC R 134A
What is the result damage to the ozone layer? - 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 - 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? - 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 - 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 - ANSWER $10,000
CFC's will no longer be manufactured or imported into the U.S. after what year? -
ANSWER 1995
Since July 1, 1992 it has been illegal to: - ANSWER Knowingly releasing HCF or HCFC
refrigerants in the U.S.
Which compounds are controlled by the Montreal protocol? - ANSWER -) chloric floric
carbons
-) hydro chloric carbons
-) halons
-) all of the above
EPA regulations cover all AC and refrigeration equipment when containing what? -
ANSWER Any refrigerant or refrigerant substitute
The syntetic substitute currently usedwith blends containing HCFCs is: - ANSWER
Alcobenzine
What is the significance of atheotropic mixture: - ANSWER The mixture combines to act
as a single compound refrigerant
Cooling occurs in a vapor compression refrigeration system when: - ANSWER
Refrigerant liquid boils into a vapor
Ozone depletion in the stratosphere is what type of problem: - ANSWER Its a GLOBAL
problem
The definition of recover is: - 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? - ANSWER Electronic ultrasonic
testers
Recovery during low ambient temperatures will: - ANSWER Slow the recovery process
During dehydration of a refrigeration system the refrigeration system is heated to: -
ANSWER Decrease dehydration time
To determine the safe pressure for leak testing one should use: - ANSWER Low side
test data plate value
,Care should be used to avoid over filling refrigerant storage cylinders because: -
ANSWER The internal pressure of the cylinders may rise and cause an explosion
When transporting cylinders containing used refrigerants DOT REQUIRES that you: -
ANSWER attach DOT classification tags
What is the significance of an azeotropic mixture? - ANSWER The mixture combines to
act like a single component refrigerant
CF Cs are more likely to reach the stratosphere than other chlorine-containing
compounds because___________. - ANSWER They are chemically very stable
Chlorofuorocarbons, or CFCs, consist ofwhich of the following chemicals? - ANSWER
Chlorine, fluorine and carbon
Which compound are the most damaging to the stratospheric ozone layer and have the
highest ozone depletion potential rating? - ANSWER CFCs
________ test methods are assumed by the EPA as the most effective methods for
locating the general area of small leaks. - ANSWER Electronic and ultrasonic
If a reclamation company is shipping a cylinder containing mixed refrigerants they may
______. - ANSWER Agree to destroy the refrigerant but typically a substantial fee is
charged
One chlorine atom in the stratosphere is capable of destroying how many ozone
molecules? - ANSWER 100,000
________is a CFC.
A) R-141b
B) R- 134a
C) R-502
D) R-123 - ANSWER R-502
HCFC refrigerants cause ____________ damage to the stratospheric ozone layer in
comparison to CFC refrigerants. - ANSWER Less
The system vacuum gauge should be connected __________? - ANSWER As far as
possible from the vacuum pump.
, Manufacture of CFCs was banned as of December 31, _______?
A) 1994
B) 1995
C) 2000
D) 2010 - ANSWER 1995
Positive evidence that CFCs are in the stratosphere comes from ____________? -
ANSWER Measurements of CFCs in air samples taken from the stratosphere
Under EPAs regulations reclaimed refrigerant must meet standards for purity before it
can be resold - ANSWER ARI 700
________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 - ANSWER
System-dependent
All devices used for refrigerant recovery must meet___________standards. - ANSWER
EPA
An example of an HCFC refrigerant: - ANSWER R-22
Which of the refrigerants listed below contain no chlorine?
A) CFCs
B)HCFCs
C) HFCs
D) ODCs - ANSWER HFCs
What characteristic or characteristics of CFCs make them more likely than other chlorine
compounds to reach the stratosphere? - ANSWER Dont disolve iin water
Each chlorine atom in the stratosphere can destroy how many ozone molecules? -
ANSWER 100,000 ozone molecules
Which refrigerant contains a CFC?
R500, R12, R113 or R11? - ANSWER Theyre all CFC's
HYDROCHLORIC FLORICCARBON (HCFC) refrigerant contain? - ANSWER Hydrogen,
chlorine, flourine and carbon
Which refrigerant is a chlorine free refrigerant? - ANSWER HFC R 134A
What is the result damage to the ozone layer? - 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 - 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? - 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 - 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 - ANSWER $10,000
CFC's will no longer be manufactured or imported into the U.S. after what year? -
ANSWER 1995
Since July 1, 1992 it has been illegal to: - ANSWER Knowingly releasing HCF or HCFC
refrigerants in the U.S.
Which compounds are controlled by the Montreal protocol? - ANSWER -) chloric floric
carbons
-) hydro chloric carbons
-) halons
-) all of the above
EPA regulations cover all AC and refrigeration equipment when containing what? -
ANSWER Any refrigerant or refrigerant substitute
The syntetic substitute currently usedwith blends containing HCFCs is: - ANSWER
Alcobenzine
What is the significance of atheotropic mixture: - ANSWER The mixture combines to act
as a single compound refrigerant
Cooling occurs in a vapor compression refrigeration system when: - ANSWER
Refrigerant liquid boils into a vapor
Ozone depletion in the stratosphere is what type of problem: - ANSWER Its a GLOBAL
problem
The definition of recover is: - 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? - ANSWER Electronic ultrasonic
testers
Recovery during low ambient temperatures will: - ANSWER Slow the recovery process
During dehydration of a refrigeration system the refrigeration system is heated to: -
ANSWER Decrease dehydration time
To determine the safe pressure for leak testing one should use: - ANSWER Low side
test data plate value
,Care should be used to avoid over filling refrigerant storage cylinders because: -
ANSWER The internal pressure of the cylinders may rise and cause an explosion
When transporting cylinders containing used refrigerants DOT REQUIRES that you: -
ANSWER attach DOT classification tags
What is the significance of an azeotropic mixture? - ANSWER The mixture combines to
act like a single component refrigerant
CF Cs are more likely to reach the stratosphere than other chlorine-containing
compounds because___________. - ANSWER They are chemically very stable
Chlorofuorocarbons, or CFCs, consist ofwhich of the following chemicals? - ANSWER
Chlorine, fluorine and carbon
Which compound are the most damaging to the stratospheric ozone layer and have the
highest ozone depletion potential rating? - ANSWER CFCs
________ test methods are assumed by the EPA as the most effective methods for
locating the general area of small leaks. - ANSWER Electronic and ultrasonic
If a reclamation company is shipping a cylinder containing mixed refrigerants they may
______. - ANSWER Agree to destroy the refrigerant but typically a substantial fee is
charged
One chlorine atom in the stratosphere is capable of destroying how many ozone
molecules? - ANSWER 100,000
________is a CFC.
A) R-141b
B) R- 134a
C) R-502
D) R-123 - ANSWER R-502
HCFC refrigerants cause ____________ damage to the stratospheric ozone layer in
comparison to CFC refrigerants. - ANSWER Less
The system vacuum gauge should be connected __________? - ANSWER As far as
possible from the vacuum pump.
, Manufacture of CFCs was banned as of December 31, _______?
A) 1994
B) 1995
C) 2000
D) 2010 - ANSWER 1995
Positive evidence that CFCs are in the stratosphere comes from ____________? -
ANSWER Measurements of CFCs in air samples taken from the stratosphere
Under EPAs regulations reclaimed refrigerant must meet standards for purity before it
can be resold - ANSWER ARI 700
________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 - ANSWER
System-dependent
All devices used for refrigerant recovery must meet___________standards. - ANSWER
EPA
An example of an HCFC refrigerant: - ANSWER R-22
Which of the refrigerants listed below contain no chlorine?
A) CFCs
B)HCFCs
C) HFCs
D) ODCs - ANSWER HFCs
