EPA 608 Core Exam-Graded A
As of what date did it become unlawful to release Class 1 and Class II
refrigerants to the atmosphere?
a. July 1, 1992
b. July 1, 1993
c. November 14, 1994
d. January 1, 1996 - correct Answers-a. July 1, 1992
What is the ozone layer and why is it important to us on Earth?
a. Thin layer of R-22 in the atmosphere that filters UV.
b. Protective shield for Earth from the sun's harmful ultraviolent (UV)
rays in the stratosphere layer that extends about 6 to 30 miles above
earth
c. Thin layer of CFC and HCFC in the atmosphere that filters UV.
d. Protective layer that shields UV in the Troposphere - correct Answers-b. Protective
shield for Earth from the sun's harmful ultraviolent (UV)
rays in the stratosphere layer that extends about 6 to 30 miles above
earth
The atom found in CFC and HCFC refrigerants that destroys ozone in the
stratosphere is?
a. Fluorine
b. Carbon
c. Hydrogen
d. Chlorine - correct Answers-d. Chlorine
What is an ozone molecule made of?
a. Refrigerant
b. Ammonia
c. Three oxygen atoms (O3).
d. Oxygen and ammonia. - correct Answers-Three oxygen atoms (O3).
Which refrigerant is a CFC?
a. R-134A
b. R-123
c. R-22
d. R-12 - correct Answers-d. R-12
What is the name of the atom that attacks ozone molecules?
a. CFC atoms
b. HCFC atoms
c. Chlorine and bromine atoms emitted into the atmosphere
,d. a and b - correct Answers-c. Chlorine and bromine atoms emitted into the
atmosphere
Which refrigerant is a HFC?
a. R-134A
b. R-123
c. R-22
d. R-12 - correct Answers-a. R-134A
Describe how one Chlorine atom can destroy 100,000 ozone molecules.
a. Chlorine releases one of the oxygen atoms and forms two O2 oxygen
molecules, leaving the chlorine molecule free to attack another
ozone molecule and repeat the process.
b. Chlorine locks up the ozone molecule and then and then goes after
another.
c. Chlorine converts the ozone to bromine and then attacks more ozone
molecules.
d. Chlorine can bleach 100,000 ozone molecules before it weakens. - correct Answers-
a. Chlorine releases one of the oxygen atoms and forms two O2 oxygen molecules,
leaving the chlorine molecule free to attack another
ozone molecule and repeat the process.
Which refrigerant contains no chlorine?
a. R-134A
b. R-123
c. R-22
d. R-12 - correct Answers-a. R-134A
Name the refrigerant types that belong to CFCs, HCFCs and HFCs
a. CFC R-11, R-12, R-500
b. HCFC R-22, R-123
c. HFC R-134a
d. All of the above are correct - correct Answers-d. All of the above are correct
The rule of thumb for refilling approved cylinders is a maximum of ___ percent
liquid?
a. 60%
b. 79%
c. 80%
d. 90% - correct Answers-c. 80%
What do the letters in "HCFC" stand for?
a. High Carbon Fluorine Chlorine
b. hydrochlorofluorocarbons
c. Harmful Carbon Fluorine Chlorine
d. highchlorinefluorocarbon - correct Answers-b. hydrochlorofluorocarbons
,To recover refrigerant is to?
a. Remove a refrigerant in any condition from a system in either an
active or passive manner, and store it in an external container
without necessarily testing or processing
b. Reduce contaminants in used refrigerant by oil separation through filter
dryers.
c. Reprocess refrigerant to new product specifications
d. Remove refrigerant and change ownership. - correct Answers-a. Remove a
refrigerant in any condition from a system in either an
active or passive manner, and store it in an external container
without necessarily testing or processing
What is ODP?
a. Oxygen Destruction Properties
b. Ozone Depletion Potential
c. Ozone Destruction Properties
d. Oxygen Depletion Potential - correct Answers-b. Ozone Depletion Potential
R-134A is a "drop in" refrigerant for?
36 | P a g e
a. R-12
b. R-22
c. R-11
d. R-134A is not a drop-in refrigerant - correct Answers-d. R-134A is not a drop-in
refrigerant
Name some of the health and environmental effects of ozone depletion.
a. Increased Temperature of the Earth
b. Increased Cases of Skin Cancer
c. Increased numbers of Cataracts in the eyes
d. All the above - correct Answers-d. All the above
The condition and state of the refrigerant leaving a receiver is?
a. Subcooled liquid
b. Subcooled vapor
c. Superheated vapor
d. Superheated liquid. - correct Answers-a. Subcooled liquid
What evidence do we have that CFCs and HCFCs are depleting the ozone?
a. The rise in the amount of chlorine measured in the stratosphere over the
past two decades matches the rise in the amount of fluorine.
b. The rise in the amount of chlorine measured in the stratosphere over the
past two decades matches the rise in CFC emissions over the same
period.
c. Samples of air taken from the stratosphere over erupting volcanoes show
, that volcanoes contribute a small quantity of chlorine to the stratosphere
compared to CFCs.
d. All the above - correct Answers-d. All the above
The component of an air conditioning system that changes a low pressure vapor
to a high pressure vapor is the?
a. Condenser
b. Metering device
c. Evaporator
d. Compressor
20.What characteristics - correct Answers-d. Compressor
What characteristics make it easy for CFCs to reach the stratosphere and how
do they get there?
a. CFCs are lighter than air atoms and rise into the Stratosphere.
b. CFCs will not dissolve in water or break down into compounds that dissolve in water.
Wind moves them into the Stratosphere
c. Heating of the CFCs makes them lighter than air.
d. a and c - correct Answers-b. CFCs will not dissolve in water or break down into
compounds that dissolve in water. Wind moves them into the Stratosphere
Why do we now use R-134a refrigerant?
a. It costs less
b. HFCs do not contain any chlorine
c. It is a drop in replacement for R-22
d. It is a drop in replacement for R-11 - correct Answers-b. HFCs do not contain any
chlorine
What is the purpose of the CAA?
37 | P a g e
a. Regulate California Air quality
b. Clean the air in the US
c. Limit how much of a pollutant can be in the air in the US - correct Answers-c. Limit
how much of a pollutant can be in the air in the US
What three things is the CAA doing to control chlorofluorocarbon emissions?
a. Set dates to phase out CFC's and HCFC's
b. Prohibit venting of CFC and HCFC
c. Require the EPA to set standards for recovery of refrigerants prior to
appliance disposal
d. All the above - correct Answers-d. All the above
What can states do in addition to the CAA?
a. Enforce standards more strict than the CAA laws
b. Nothing
c. States can create their own laws.
As of what date did it become unlawful to release Class 1 and Class II
refrigerants to the atmosphere?
a. July 1, 1992
b. July 1, 1993
c. November 14, 1994
d. January 1, 1996 - correct Answers-a. July 1, 1992
What is the ozone layer and why is it important to us on Earth?
a. Thin layer of R-22 in the atmosphere that filters UV.
b. Protective shield for Earth from the sun's harmful ultraviolent (UV)
rays in the stratosphere layer that extends about 6 to 30 miles above
earth
c. Thin layer of CFC and HCFC in the atmosphere that filters UV.
d. Protective layer that shields UV in the Troposphere - correct Answers-b. Protective
shield for Earth from the sun's harmful ultraviolent (UV)
rays in the stratosphere layer that extends about 6 to 30 miles above
earth
The atom found in CFC and HCFC refrigerants that destroys ozone in the
stratosphere is?
a. Fluorine
b. Carbon
c. Hydrogen
d. Chlorine - correct Answers-d. Chlorine
What is an ozone molecule made of?
a. Refrigerant
b. Ammonia
c. Three oxygen atoms (O3).
d. Oxygen and ammonia. - correct Answers-Three oxygen atoms (O3).
Which refrigerant is a CFC?
a. R-134A
b. R-123
c. R-22
d. R-12 - correct Answers-d. R-12
What is the name of the atom that attacks ozone molecules?
a. CFC atoms
b. HCFC atoms
c. Chlorine and bromine atoms emitted into the atmosphere
,d. a and b - correct Answers-c. Chlorine and bromine atoms emitted into the
atmosphere
Which refrigerant is a HFC?
a. R-134A
b. R-123
c. R-22
d. R-12 - correct Answers-a. R-134A
Describe how one Chlorine atom can destroy 100,000 ozone molecules.
a. Chlorine releases one of the oxygen atoms and forms two O2 oxygen
molecules, leaving the chlorine molecule free to attack another
ozone molecule and repeat the process.
b. Chlorine locks up the ozone molecule and then and then goes after
another.
c. Chlorine converts the ozone to bromine and then attacks more ozone
molecules.
d. Chlorine can bleach 100,000 ozone molecules before it weakens. - correct Answers-
a. Chlorine releases one of the oxygen atoms and forms two O2 oxygen molecules,
leaving the chlorine molecule free to attack another
ozone molecule and repeat the process.
Which refrigerant contains no chlorine?
a. R-134A
b. R-123
c. R-22
d. R-12 - correct Answers-a. R-134A
Name the refrigerant types that belong to CFCs, HCFCs and HFCs
a. CFC R-11, R-12, R-500
b. HCFC R-22, R-123
c. HFC R-134a
d. All of the above are correct - correct Answers-d. All of the above are correct
The rule of thumb for refilling approved cylinders is a maximum of ___ percent
liquid?
a. 60%
b. 79%
c. 80%
d. 90% - correct Answers-c. 80%
What do the letters in "HCFC" stand for?
a. High Carbon Fluorine Chlorine
b. hydrochlorofluorocarbons
c. Harmful Carbon Fluorine Chlorine
d. highchlorinefluorocarbon - correct Answers-b. hydrochlorofluorocarbons
,To recover refrigerant is to?
a. Remove a refrigerant in any condition from a system in either an
active or passive manner, and store it in an external container
without necessarily testing or processing
b. Reduce contaminants in used refrigerant by oil separation through filter
dryers.
c. Reprocess refrigerant to new product specifications
d. Remove refrigerant and change ownership. - correct Answers-a. Remove a
refrigerant in any condition from a system in either an
active or passive manner, and store it in an external container
without necessarily testing or processing
What is ODP?
a. Oxygen Destruction Properties
b. Ozone Depletion Potential
c. Ozone Destruction Properties
d. Oxygen Depletion Potential - correct Answers-b. Ozone Depletion Potential
R-134A is a "drop in" refrigerant for?
36 | P a g e
a. R-12
b. R-22
c. R-11
d. R-134A is not a drop-in refrigerant - correct Answers-d. R-134A is not a drop-in
refrigerant
Name some of the health and environmental effects of ozone depletion.
a. Increased Temperature of the Earth
b. Increased Cases of Skin Cancer
c. Increased numbers of Cataracts in the eyes
d. All the above - correct Answers-d. All the above
The condition and state of the refrigerant leaving a receiver is?
a. Subcooled liquid
b. Subcooled vapor
c. Superheated vapor
d. Superheated liquid. - correct Answers-a. Subcooled liquid
What evidence do we have that CFCs and HCFCs are depleting the ozone?
a. The rise in the amount of chlorine measured in the stratosphere over the
past two decades matches the rise in the amount of fluorine.
b. The rise in the amount of chlorine measured in the stratosphere over the
past two decades matches the rise in CFC emissions over the same
period.
c. Samples of air taken from the stratosphere over erupting volcanoes show
, that volcanoes contribute a small quantity of chlorine to the stratosphere
compared to CFCs.
d. All the above - correct Answers-d. All the above
The component of an air conditioning system that changes a low pressure vapor
to a high pressure vapor is the?
a. Condenser
b. Metering device
c. Evaporator
d. Compressor
20.What characteristics - correct Answers-d. Compressor
What characteristics make it easy for CFCs to reach the stratosphere and how
do they get there?
a. CFCs are lighter than air atoms and rise into the Stratosphere.
b. CFCs will not dissolve in water or break down into compounds that dissolve in water.
Wind moves them into the Stratosphere
c. Heating of the CFCs makes them lighter than air.
d. a and c - correct Answers-b. CFCs will not dissolve in water or break down into
compounds that dissolve in water. Wind moves them into the Stratosphere
Why do we now use R-134a refrigerant?
a. It costs less
b. HFCs do not contain any chlorine
c. It is a drop in replacement for R-22
d. It is a drop in replacement for R-11 - correct Answers-b. HFCs do not contain any
chlorine
What is the purpose of the CAA?
37 | P a g e
a. Regulate California Air quality
b. Clean the air in the US
c. Limit how much of a pollutant can be in the air in the US - correct Answers-c. Limit
how much of a pollutant can be in the air in the US
What three things is the CAA doing to control chlorofluorocarbon emissions?
a. Set dates to phase out CFC's and HCFC's
b. Prohibit venting of CFC and HCFC
c. Require the EPA to set standards for recovery of refrigerants prior to
appliance disposal
d. All the above - correct Answers-d. All the above
What can states do in addition to the CAA?
a. Enforce standards more strict than the CAA laws
b. Nothing
c. States can create their own laws.
