EPA 608 CORE Exam Questions and Answers (2022/2023)
(Verified Answers) Graded A+
What characteristic or characteristics of CFCs make them more likely than other
chlorine compounds to reach the stratosphere?
Dont disolve iin water
Each chlorine atom in the stratosphere can destroy how many ozone molecules?
100,000 ozone molecules
Which refrigerant contains a CFC?
R500, R12, R113 or R11?
Theyre all CFC's
HYDROCHLORIC FLORICCARBON (HCFC) refrigerant contain?
Hydrogen, chlorine, flourine and carbon
Which refrigerant is a chlorine free refrigerant?
HFC R 134A
What is the result damage to the ozone layer?
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
-) 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?
-) 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
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
$10,000
CFC's will no longer be manufactured or imported into the U.S. after what year?
1995
Since July 1, 1992 it has been illegal to:
Knowingly releasing HCF or HCFC refrigerants in the U.S.
Which compounds are controlled by the Montreal protocol?
-) chloric floric carbons
-) hydro chloric carbons
,-) halons
-) all of the above
EPA regulations cover all AC and refrigeration equipment when containing what?
Any refrigerant or refrigerant substitute
The syntetic substitute currently usedwith blends containing HCFCs is:
Alcobenzine
What is the significance of atheotropic mixture:
The mixture combines to act as a single compound refrigerant
Cooling occurs in a vapor compression refrigeration system when:
Refrigerant liquid boils into a vapor
Ozone depletion in the stratosphere is what type of problem:
Its a GLOBAL problem
The definition of recover is:
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?
Electronic ultrasonic testers
Recovery during low ambient temperatures will:
Slow the recovery process
During dehydration of a refrigeration system the refrigeration system is heated
to:
Decrease dehydration time
To determine the safe pressure for leak testing one should use:
Low side test data plate value
Care should be used to avoid over filling refrigerant storage cylinders because:
The internal pressure of the cylinders may rise and cause an explosion
When transporting cylinders containing used refrigerants DOT REQUIRES that
you:
attach DOT classification tags
What is the significance of an azeotropic mixture?
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___________.
They are chemically very stable
Chlorofuorocarbons, or CFCs, consist ofwhich of the following chemicals?
Chlorine, fluorine and carbon
Which compound are the most damaging to the stratospheric ozone layer and
have the highest ozone depletion potential rating?
CFCs
________ test methods are assumed by the EPA as the most effective methods
for locating the general area of small leaks.
Electronic and ultrasonic
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
, One chlorine atom in the stratosphere is capable of destroying how many ozone
molecules?
100,000
________is a CFC.
A) R-141b
B) R- 134a
C) R-502
D) R-123
R-502
HCFC refrigerants cause ____________ damage to the stratospheric ozone layer
in comparison to CFC refrigerants.
Less
The system vacuum gauge should be connected __________?
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
1995
Positive evidence that CFCs are in the stratosphere comes from ____________?
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
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
System-dependent
All devices used for refrigerant recovery must meet___________standards.
EPA
An example of an HCFC refrigerant:
R-22
Which of the refrigerants listed below contain no chlorine?
A) CFCs
B)HCFCs
C) HFCs
D) ODCs
HFCs
Which refrigerant is an HFC?
A) R-123
B) R- 134a
C) R- 11
D) R- 22
R-134a
(Verified Answers) Graded A+
What characteristic or characteristics of CFCs make them more likely than other
chlorine compounds to reach the stratosphere?
Dont disolve iin water
Each chlorine atom in the stratosphere can destroy how many ozone molecules?
100,000 ozone molecules
Which refrigerant contains a CFC?
R500, R12, R113 or R11?
Theyre all CFC's
HYDROCHLORIC FLORICCARBON (HCFC) refrigerant contain?
Hydrogen, chlorine, flourine and carbon
Which refrigerant is a chlorine free refrigerant?
HFC R 134A
What is the result damage to the ozone layer?
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
-) 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?
-) 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
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
$10,000
CFC's will no longer be manufactured or imported into the U.S. after what year?
1995
Since July 1, 1992 it has been illegal to:
Knowingly releasing HCF or HCFC refrigerants in the U.S.
Which compounds are controlled by the Montreal protocol?
-) chloric floric carbons
-) hydro chloric carbons
,-) halons
-) all of the above
EPA regulations cover all AC and refrigeration equipment when containing what?
Any refrigerant or refrigerant substitute
The syntetic substitute currently usedwith blends containing HCFCs is:
Alcobenzine
What is the significance of atheotropic mixture:
The mixture combines to act as a single compound refrigerant
Cooling occurs in a vapor compression refrigeration system when:
Refrigerant liquid boils into a vapor
Ozone depletion in the stratosphere is what type of problem:
Its a GLOBAL problem
The definition of recover is:
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?
Electronic ultrasonic testers
Recovery during low ambient temperatures will:
Slow the recovery process
During dehydration of a refrigeration system the refrigeration system is heated
to:
Decrease dehydration time
To determine the safe pressure for leak testing one should use:
Low side test data plate value
Care should be used to avoid over filling refrigerant storage cylinders because:
The internal pressure of the cylinders may rise and cause an explosion
When transporting cylinders containing used refrigerants DOT REQUIRES that
you:
attach DOT classification tags
What is the significance of an azeotropic mixture?
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___________.
They are chemically very stable
Chlorofuorocarbons, or CFCs, consist ofwhich of the following chemicals?
Chlorine, fluorine and carbon
Which compound are the most damaging to the stratospheric ozone layer and
have the highest ozone depletion potential rating?
CFCs
________ test methods are assumed by the EPA as the most effective methods
for locating the general area of small leaks.
Electronic and ultrasonic
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
, One chlorine atom in the stratosphere is capable of destroying how many ozone
molecules?
100,000
________is a CFC.
A) R-141b
B) R- 134a
C) R-502
D) R-123
R-502
HCFC refrigerants cause ____________ damage to the stratospheric ozone layer
in comparison to CFC refrigerants.
Less
The system vacuum gauge should be connected __________?
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
1995
Positive evidence that CFCs are in the stratosphere comes from ____________?
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
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
System-dependent
All devices used for refrigerant recovery must meet___________standards.
EPA
An example of an HCFC refrigerant:
R-22
Which of the refrigerants listed below contain no chlorine?
A) CFCs
B)HCFCs
C) HFCs
D) ODCs
HFCs
Which refrigerant is an HFC?
A) R-123
B) R- 134a
C) R- 11
D) R- 22
R-134a
