EPA 608 CERTIFICATION EXAM NEWEST
2026/2027 ACTUAL EXAM STUDY GUIDE
COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES
(VERIFIED ANSWERS) |ALREADY GRADED
A+||NEWEST VERSION
Chlorofluorocarbons (CFC's) and hydrochlorofluorocarbons (HCFC's) have which of the following
in common? - ANSWER They must be recovered before opening or disposing of appliances
Refrigerant that is recovered can be returned to: - ANSWER the same system or other
systems owned by the same person without restrictions
An example of an HFC refrigerant is: - ANSWER R-134a
When transporting cylinders containing used refrigerant, the DOT requires that you: -
ANSWER attach DOT classification tags
Blended refrigerants leak from a system: - ANSWER in uneven amounts due to different
vapor pressures
Which type of refrigerant is the most harmful to stratospheric ozone? - ANSWER CFC
,Long hoses between the unit and the recovery machine should not be used because they
cause: - ANSWER ◦A) excessive pressure drop
◦B) increased recovery time
◦C) Increased emissions
If corrosion is found within the body of a relief valve, the valve must be: - ANSWER replaced
Disposable refrigerant containers are used for ______ refrigerant. - ANSWER virgin
Never use an open flame to heat a refrigerant tank because
◦A) it can result in venting refrigerant to the atmosphere
◦B) the tank may explode, causing serious injury to people nearby
◦C) refrigerant in the tank may decompose, forming a toxic material - ANSWER ◦A) it can
result in venting refrigerant to the atmosphere
◦B) the tank may explode, causing serious injury to people nearby
◦C) refrigerant in the tank may decompose, forming a toxic material
If an oil is hygroscopic, it means that it: - ANSWER readily absorbs moisture
The type of oil that is most commonly used in stationary refrigeration applications w/ HFC-134a
refrigerant is: - ANSWER ester oil
Which type of refrigerant is the most harmful to stratospheric ozone? - ANSWER refrigerants
containing bromine
Ozone depletion in the Stratosphere is what type of problem? - ANSWER global
,Under EPA's regulations, what standard must reclaimed refrigerant meet before it can be
resold? - ANSWER ARI 700
Under the EPA's " safe disposal requirements ", who is responsible of making sure that the
refrigerant is removed from household refrigerators before they are disposed of: -
ANSWER final person in the disposal chain
Ozone depletion potential, or "ODP," is - ANSWER a measure of the ability of CFCs and HCFCs
to destroy ozone
_______ is the process of removing refrigerant in any condition from a system and storing it in
a container without necessarily testing or processing it in any way. - ANSWER recovering
The EPA can require a technician to demonstrate their ability to perform proper procedures for
recovering and/or recycling refrigerant. Failure to demonstrate competency can result in: -
ANSWER revocation of the technician's certification
Never use oxygen or compressed air to pressurize a system because: - ANSWER when mixed
with compressor oil or some refrigerants, it could explode
Which of the following is an approved "drop-in" service replacement for R-12? HFC-134a, HFC-
410a, R-407c, according to the EPA there are no "drop-in" replacements - ANSWER according
to the EPA there are no "drop-in" replacements
The synthetic lubricant presently used with ternary blends containing HCFCs is -
ANSWER alkylbenzene
, On a typical three port ( three hose) manifold gauge, the center port is used for: -
ANSWER recovery, evacuation and charging
What refrigerant type has the highest ozone depletion potential? HCFCs, HFCs, CFCs -
ANSWER CFCs
What refrigerant has the lowest ozone depletion potential? R-22, R-11, R-12, or R-113 -
ANSWER R-22
Which refrigerants must be recovered before opening a system or disposing of a system? -
ANSWER all refrigerants must be recovered
When dehydrating a system, the system can be heated to - ANSWER decrease the
dehydration time
Use _______ to remove ice from the sight glass. - ANSWER an alcohol spray
What atom of the CFC molecule causes ozone depletion? - ANSWER chlorine
Refrigerant vapors or mist should not be inhaled because: - ANSWER they may cause heart
irregularities and/or unconsciousness
The high-pressure gauge on service manifold sets has a continuous scale, usually calibrated to
read from: - ANSWER 0-500psi
P.P.E.'s (gloves, safety glasses, safety shoes, etc.) should always be worn is when: - ANSWER
2026/2027 ACTUAL EXAM STUDY GUIDE
COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES
(VERIFIED ANSWERS) |ALREADY GRADED
A+||NEWEST VERSION
Chlorofluorocarbons (CFC's) and hydrochlorofluorocarbons (HCFC's) have which of the following
in common? - ANSWER They must be recovered before opening or disposing of appliances
Refrigerant that is recovered can be returned to: - ANSWER the same system or other
systems owned by the same person without restrictions
An example of an HFC refrigerant is: - ANSWER R-134a
When transporting cylinders containing used refrigerant, the DOT requires that you: -
ANSWER attach DOT classification tags
Blended refrigerants leak from a system: - ANSWER in uneven amounts due to different
vapor pressures
Which type of refrigerant is the most harmful to stratospheric ozone? - ANSWER CFC
,Long hoses between the unit and the recovery machine should not be used because they
cause: - ANSWER ◦A) excessive pressure drop
◦B) increased recovery time
◦C) Increased emissions
If corrosion is found within the body of a relief valve, the valve must be: - ANSWER replaced
Disposable refrigerant containers are used for ______ refrigerant. - ANSWER virgin
Never use an open flame to heat a refrigerant tank because
◦A) it can result in venting refrigerant to the atmosphere
◦B) the tank may explode, causing serious injury to people nearby
◦C) refrigerant in the tank may decompose, forming a toxic material - ANSWER ◦A) it can
result in venting refrigerant to the atmosphere
◦B) the tank may explode, causing serious injury to people nearby
◦C) refrigerant in the tank may decompose, forming a toxic material
If an oil is hygroscopic, it means that it: - ANSWER readily absorbs moisture
The type of oil that is most commonly used in stationary refrigeration applications w/ HFC-134a
refrigerant is: - ANSWER ester oil
Which type of refrigerant is the most harmful to stratospheric ozone? - ANSWER refrigerants
containing bromine
Ozone depletion in the Stratosphere is what type of problem? - ANSWER global
,Under EPA's regulations, what standard must reclaimed refrigerant meet before it can be
resold? - ANSWER ARI 700
Under the EPA's " safe disposal requirements ", who is responsible of making sure that the
refrigerant is removed from household refrigerators before they are disposed of: -
ANSWER final person in the disposal chain
Ozone depletion potential, or "ODP," is - ANSWER a measure of the ability of CFCs and HCFCs
to destroy ozone
_______ is the process of removing refrigerant in any condition from a system and storing it in
a container without necessarily testing or processing it in any way. - ANSWER recovering
The EPA can require a technician to demonstrate their ability to perform proper procedures for
recovering and/or recycling refrigerant. Failure to demonstrate competency can result in: -
ANSWER revocation of the technician's certification
Never use oxygen or compressed air to pressurize a system because: - ANSWER when mixed
with compressor oil or some refrigerants, it could explode
Which of the following is an approved "drop-in" service replacement for R-12? HFC-134a, HFC-
410a, R-407c, according to the EPA there are no "drop-in" replacements - ANSWER according
to the EPA there are no "drop-in" replacements
The synthetic lubricant presently used with ternary blends containing HCFCs is -
ANSWER alkylbenzene
, On a typical three port ( three hose) manifold gauge, the center port is used for: -
ANSWER recovery, evacuation and charging
What refrigerant type has the highest ozone depletion potential? HCFCs, HFCs, CFCs -
ANSWER CFCs
What refrigerant has the lowest ozone depletion potential? R-22, R-11, R-12, or R-113 -
ANSWER R-22
Which refrigerants must be recovered before opening a system or disposing of a system? -
ANSWER all refrigerants must be recovered
When dehydrating a system, the system can be heated to - ANSWER decrease the
dehydration time
Use _______ to remove ice from the sight glass. - ANSWER an alcohol spray
What atom of the CFC molecule causes ozone depletion? - ANSWER chlorine
Refrigerant vapors or mist should not be inhaled because: - ANSWER they may cause heart
irregularities and/or unconsciousness
The high-pressure gauge on service manifold sets has a continuous scale, usually calibrated to
read from: - ANSWER 0-500psi
P.P.E.'s (gloves, safety glasses, safety shoes, etc.) should always be worn is when: - ANSWER
