EPA 608 UNIVERSAL EXAM QUESTIONS WITH COMPLETE
SOLUTIONS GUARANTEED PASS 2025/2026
A chiller with a charge of 200 pounds of an ozone-depleting refrigerant
has passed the initial verification leak test. When must a follow-up
verification test be conducted? - ANSWER ->Within 10 days
Why are some hydrofluoroolefin (HFO) refrigerants classified as "A2L"?
- ANSWER ->They are less flammable than hydrocarbon refrigerants,
but most are still mildly flammable
To determine if the system is leaking more than the allowed rate, the
EPA allows the use of which one of the following methods to determine
the full charge? - ANSWER ->Use of calculations based on component
and pipe sizes
When could a reciprocating compressor be damaged if energized? -
ANSWER ->When the discharge service valve is closed
Which of the following are included in EPA's definition of a "small
appliance"? - ANSWER ->Products manufactured, fully charged and
hermetically sealed in a factory
,Recovering refrigerant from a system in the vapor phase will minimize
the loss of which of the following? - ANSWER ->Oil
Which of the following is an indicator of a leak in a high-pressure
system with a capillary tube? - ANSWER ->Excessive superheat
A typical setting for the high-pressure cut-out control on a recovery unit
used for evacuating the refrigerant from a low-pressure chiller is: -
ANSWER ->10 psig
When is it essential to take measures to help release trapped CFC,
HCFC, or HFC refrigerant from the compressor oil during refrigerant
recovery? - ANSWER ->When using self-contained recovery devices
Excessive running of a purge system on a low-pressure chiller generally
indicates what condition? - ANSWER ->Leaking system
Which of the following always falls under the EPA definition for "major
maintenance, service, or repair"? - ANSWER ->Replacing a compressor
,What effect will low ambient temperatures have on recovery? -
ANSWER ->Increase the recovery time What should be used to remove
ice from sight glasses or viewing glasses? - ANSWER ->An alcohol spray
After installation of a field piped split system, the unit should first be
pressurized with: - ANSWERnitrogen and leak checked
Pressure relief valves can only be installed: - ANSWER ->in parallel
How many access valves are needed to recover the refrigerant on a
sealed system with an operating compressor that has a completely
restricted capillary tube? - ANSWER ->Only one access valve, on the
high side of the system
What is the state of the refrigerant entering the compressor of a
refrigerant system? - ANSWER ->Low pressure vapor
When first inspecting a hermetic system known to be leaking, you
should look for: - ANSWER ->traces of oil
Why should low and high side access valves be installed when
recovering refrigerant from a household refrigerator? - ANSWER ->To
improve speed of recovery
, What is the Montreal Protocol? - ANSWER ->An international treaty
that addresses ozone-depleting substances and their alternatives
A rupture disc on a recovery vessel for low-pressure refrigerants
relieves at: - ANSWER ->15 psig
What must be done before disposing of any appliance containing a CFC,
HCFC, or HFC refrigerant? - ANSWER ->Recover the refrigerant
What must a system owner do once the threshold leak rate has been
exceeded on any low-pressure system using an ozone-depleting
refrigerant? - ANSWER ->Repair the appliance enough to bring the leak
rate below the threshold, retrofit, or retire the appliance
What may be done to speed the recovery process and ensure that all
CFC, HCFC, or HFC refrigerant has been removed from a frost-free
refrigerator? - ANSWER ->Turn on the defrost heater to increase the
refrigerant's temperature and vaporize any liquid
When using a self-contained recovery device on a CFC, HCFC, or HFC
system with an operating compressor, technicians must: - ANSWER
>either recover the refrigerant to 4 inches of mercury vacuum or 90%
of the nameplate charge
SOLUTIONS GUARANTEED PASS 2025/2026
A chiller with a charge of 200 pounds of an ozone-depleting refrigerant
has passed the initial verification leak test. When must a follow-up
verification test be conducted? - ANSWER ->Within 10 days
Why are some hydrofluoroolefin (HFO) refrigerants classified as "A2L"?
- ANSWER ->They are less flammable than hydrocarbon refrigerants,
but most are still mildly flammable
To determine if the system is leaking more than the allowed rate, the
EPA allows the use of which one of the following methods to determine
the full charge? - ANSWER ->Use of calculations based on component
and pipe sizes
When could a reciprocating compressor be damaged if energized? -
ANSWER ->When the discharge service valve is closed
Which of the following are included in EPA's definition of a "small
appliance"? - ANSWER ->Products manufactured, fully charged and
hermetically sealed in a factory
,Recovering refrigerant from a system in the vapor phase will minimize
the loss of which of the following? - ANSWER ->Oil
Which of the following is an indicator of a leak in a high-pressure
system with a capillary tube? - ANSWER ->Excessive superheat
A typical setting for the high-pressure cut-out control on a recovery unit
used for evacuating the refrigerant from a low-pressure chiller is: -
ANSWER ->10 psig
When is it essential to take measures to help release trapped CFC,
HCFC, or HFC refrigerant from the compressor oil during refrigerant
recovery? - ANSWER ->When using self-contained recovery devices
Excessive running of a purge system on a low-pressure chiller generally
indicates what condition? - ANSWER ->Leaking system
Which of the following always falls under the EPA definition for "major
maintenance, service, or repair"? - ANSWER ->Replacing a compressor
,What effect will low ambient temperatures have on recovery? -
ANSWER ->Increase the recovery time What should be used to remove
ice from sight glasses or viewing glasses? - ANSWER ->An alcohol spray
After installation of a field piped split system, the unit should first be
pressurized with: - ANSWERnitrogen and leak checked
Pressure relief valves can only be installed: - ANSWER ->in parallel
How many access valves are needed to recover the refrigerant on a
sealed system with an operating compressor that has a completely
restricted capillary tube? - ANSWER ->Only one access valve, on the
high side of the system
What is the state of the refrigerant entering the compressor of a
refrigerant system? - ANSWER ->Low pressure vapor
When first inspecting a hermetic system known to be leaking, you
should look for: - ANSWER ->traces of oil
Why should low and high side access valves be installed when
recovering refrigerant from a household refrigerator? - ANSWER ->To
improve speed of recovery
, What is the Montreal Protocol? - ANSWER ->An international treaty
that addresses ozone-depleting substances and their alternatives
A rupture disc on a recovery vessel for low-pressure refrigerants
relieves at: - ANSWER ->15 psig
What must be done before disposing of any appliance containing a CFC,
HCFC, or HFC refrigerant? - ANSWER ->Recover the refrigerant
What must a system owner do once the threshold leak rate has been
exceeded on any low-pressure system using an ozone-depleting
refrigerant? - ANSWER ->Repair the appliance enough to bring the leak
rate below the threshold, retrofit, or retire the appliance
What may be done to speed the recovery process and ensure that all
CFC, HCFC, or HFC refrigerant has been removed from a frost-free
refrigerator? - ANSWER ->Turn on the defrost heater to increase the
refrigerant's temperature and vaporize any liquid
When using a self-contained recovery device on a CFC, HCFC, or HFC
system with an operating compressor, technicians must: - ANSWER
>either recover the refrigerant to 4 inches of mercury vacuum or 90%
of the nameplate charge
