EPA 608 EXAM NEWEST EXAM
2026 380 QUESTIONS WITH
CORRECT VERIFIED ANSWERS |
ALREADY GRADED A+ | LATEST
COMPLETE VERSION |
GUARANTEED PASS!
"When recovering refrigerant using a passive recovery system and the system has an
inoperative compressor, it is __________. - CORRECT ANSWER=> helpful to heat and stretch the
compressor with a rubber mallet to release any refrigerant trapped in and under the
compressor oil"
"What requires access in both the high and low side of the system for refrigerant recovery when
using a passive recovery process? - CORRECT ANSWER=> when the compressor does not run"
"What is the pressure of a storage cylinder of R-134a, that is stored in a room where the
temperature is 100 °F? - CORRECT ANSWER=> 124 psig"
"Recovery of refrigerant cannot begin if the initial pressure in the system is _______. - CORRECT
ANSWER=> 0 psig"
"Which maintenance practice should be performed on a regular basis? - CORRECT ANSWER=> a.
change the vacuum pump oil
b. check the recovery equipment for leaks
c. check the manifold hose set for leaks"
1|Page
,"Which refrigerants can be mixed in a system? - CORRECT ANSWER=> refrigerants cannot be
mixed"
"Which of the following is required by the EPA when attaching a gauge set? - CORRECT
ANSWER=> either self-healing valves on the ends of the gauge set hoses to minimize any release
of refrigerant or manual hand valves on the ends of the gauge set hoses to minimize any release
of refrigerant"
"Always look for oil contamination when recovering refrigerant because _______. - CORRECT
ANSWER=> contaminated oil indicates the system will need to be flushed"
"Nitrogen tanks should always be equipped with a _________. - CORRECT ANSWER=> pressure
regulator and pressure relief valve downstream of the regulator"
"CFC and HCFC refrigerants can decompose to form _________. - CORRECT ANSWER=>
hydrochloric and hydrofluoric acids"
"At high temperatures, CFC and HCFC refrigerants can decompose into _________. - CORRECT
ANSWER=> phosgene gas"
"A very large refrigerant leak can cause suffocation because refrigerants _________. - CORRECT
ANSWER=> are heavier than air and displace oxygen"
"For a belt-driven non-hermetic compressor system, the ________ is most likely to leak if the
system has not been operated for several months. - CORRECT ANSWER=> shaft seal"
"____________ indicates low charge in a high-pressure system with a capillary tube. - CORRECT
ANSWER=> excessive superheat"
"To determine the system charge for leakage rate calculations, the EPA allows the use of
calculations based on _________. - CORRECT ANSWER=> component and pipe sizes"
"A comfort-cooling appliance containing 60 pounds of refrigerant has a significant leak (leaking
beyond the applicable leak rate threshold). You have _______ days to repair the leak and
perform a successful initial leak verification test. - CORRECT ANSWER=> 30"
"When beginning recovery, it is fastest to remove the refrigerant as a _________. - CORRECT
ANSWER=> liquid"
2|Page
,"Recovering refrigerant as a vapor minimizes the removal of _______ from the system. -
CORRECT ANSWER=> oil"
"After all the liquid refrigerant has been recovered from a system, the remaining vapor
____________. - CORRECT ANSWER=> must be removed by the recovery system to the required
evacuation level"
"____________ will speed up recovery. - CORRECT ANSWER=> cooling the recovery tank"
"A hermetic compressor will overheat if operated in a vacuum because _________. - CORRECT
ANSWER=> the compressor motor uses the flow of refrigerant through the compressor for
cooling"
"You have a recovery machine certified for both R-407C and R-410A with R-410A refrigerant in
it. You now have to recover refrigerant from a R-407C unit. What must be done before
beginning the R-407C recovery? - CORRECT ANSWER=> remove the R-410A from the recovery
unit (and hoses), change the filter drier, and change the recovery cylinder to an R-407C cylinder"
"During a TXV repair, refrigerant was recovered from the system. The refrigerant ___________. -
CORRECT ANSWER=> can be charged back into the same system after repairs are made and the
system is leak checked and properly evacuated"
"A system with a large liquid receiver needs a major system repair to replace a faulty TXV. When
servicing the unit ________. - CORRECT ANSWER=> the refrigerant should be recovered to or
isolated in the receiver"
"EPA-approved recycling and recovery equipment must __________. - CORRECT ANSWER=> a. be
tested by an EPA-approved third party and have a label verifying it meets EPA requirements
b. be equipped with low-loss fittings
c. be certified for use with the refrigerant being recovered or recycled"
"You are changing out the compressor of a system containing 40 pounds of R-404A, you must
_____________. - CORRECT ANSWER=> isolate the compressor, evacuate the isolated section of
the system to 0 psig, and if system pressure does not rise after a few minutes, remove the
compressor"
3|Page
, "After reaching the required recovery vacuum on a system, ________. - CORRECT ANSWER=>
wait at least a few minutes to see if the system pressure rises"
"You have to open an R-410A system with a normal charge of 250 pounds, to replace a
compressor, you must evacuate the system to _______. - CORRECT ANSWER=> 10 inches Hg
vacuum"
"If leaks in a system make the recovery to a required evacuation level unattainable or if reaching
this level of evacuation would draw air into the recovered refrigerant, you are only required to
recover down to a pressure of _______. - CORRECT ANSWER=> 0 psig"
"Which repair is ALWAYS considered "major system repair" under EPA's regulations? - CORRECT
ANSWER=> replacement of a condenser"
"It is against EPA regulations to use system-dependent recovery unit when the _______. -
CORRECT ANSWER=> appliance contains over 15 pounds of refrigerant"
"To determine the type of refrigerant used in a 90 ton packaged rooftop unit, __________. -
CORRECT ANSWER=> check the unit nameplate"
"Oil foaming usually occurs in the ______. - CORRECT ANSWER=> compressor"
"Is a hermetic compressor is activated while under a deep vacuum, the ________. - CORRECT
ANSWER=> motor windings could be damaged"
"An oversized vacuum pump can cause __________ during evacuation. - CORRECT ANSWER=>
water in the system to freeze"
"An equipment room refrigerant detector is not required under ASHRAE Standard 15 to detect
________, but the ventilation system must operate continuously. - CORRECT ANSWER=> R-717"
"Every refrigerating system must be protected by _______. - CORRECT ANSWER=> a pressure
relief device"
"A hydrostatic tube test kit is used to _______. - CORRECT ANSWER=> find if there is a leak in the
tube"
4|Page
2026 380 QUESTIONS WITH
CORRECT VERIFIED ANSWERS |
ALREADY GRADED A+ | LATEST
COMPLETE VERSION |
GUARANTEED PASS!
"When recovering refrigerant using a passive recovery system and the system has an
inoperative compressor, it is __________. - CORRECT ANSWER=> helpful to heat and stretch the
compressor with a rubber mallet to release any refrigerant trapped in and under the
compressor oil"
"What requires access in both the high and low side of the system for refrigerant recovery when
using a passive recovery process? - CORRECT ANSWER=> when the compressor does not run"
"What is the pressure of a storage cylinder of R-134a, that is stored in a room where the
temperature is 100 °F? - CORRECT ANSWER=> 124 psig"
"Recovery of refrigerant cannot begin if the initial pressure in the system is _______. - CORRECT
ANSWER=> 0 psig"
"Which maintenance practice should be performed on a regular basis? - CORRECT ANSWER=> a.
change the vacuum pump oil
b. check the recovery equipment for leaks
c. check the manifold hose set for leaks"
1|Page
,"Which refrigerants can be mixed in a system? - CORRECT ANSWER=> refrigerants cannot be
mixed"
"Which of the following is required by the EPA when attaching a gauge set? - CORRECT
ANSWER=> either self-healing valves on the ends of the gauge set hoses to minimize any release
of refrigerant or manual hand valves on the ends of the gauge set hoses to minimize any release
of refrigerant"
"Always look for oil contamination when recovering refrigerant because _______. - CORRECT
ANSWER=> contaminated oil indicates the system will need to be flushed"
"Nitrogen tanks should always be equipped with a _________. - CORRECT ANSWER=> pressure
regulator and pressure relief valve downstream of the regulator"
"CFC and HCFC refrigerants can decompose to form _________. - CORRECT ANSWER=>
hydrochloric and hydrofluoric acids"
"At high temperatures, CFC and HCFC refrigerants can decompose into _________. - CORRECT
ANSWER=> phosgene gas"
"A very large refrigerant leak can cause suffocation because refrigerants _________. - CORRECT
ANSWER=> are heavier than air and displace oxygen"
"For a belt-driven non-hermetic compressor system, the ________ is most likely to leak if the
system has not been operated for several months. - CORRECT ANSWER=> shaft seal"
"____________ indicates low charge in a high-pressure system with a capillary tube. - CORRECT
ANSWER=> excessive superheat"
"To determine the system charge for leakage rate calculations, the EPA allows the use of
calculations based on _________. - CORRECT ANSWER=> component and pipe sizes"
"A comfort-cooling appliance containing 60 pounds of refrigerant has a significant leak (leaking
beyond the applicable leak rate threshold). You have _______ days to repair the leak and
perform a successful initial leak verification test. - CORRECT ANSWER=> 30"
"When beginning recovery, it is fastest to remove the refrigerant as a _________. - CORRECT
ANSWER=> liquid"
2|Page
,"Recovering refrigerant as a vapor minimizes the removal of _______ from the system. -
CORRECT ANSWER=> oil"
"After all the liquid refrigerant has been recovered from a system, the remaining vapor
____________. - CORRECT ANSWER=> must be removed by the recovery system to the required
evacuation level"
"____________ will speed up recovery. - CORRECT ANSWER=> cooling the recovery tank"
"A hermetic compressor will overheat if operated in a vacuum because _________. - CORRECT
ANSWER=> the compressor motor uses the flow of refrigerant through the compressor for
cooling"
"You have a recovery machine certified for both R-407C and R-410A with R-410A refrigerant in
it. You now have to recover refrigerant from a R-407C unit. What must be done before
beginning the R-407C recovery? - CORRECT ANSWER=> remove the R-410A from the recovery
unit (and hoses), change the filter drier, and change the recovery cylinder to an R-407C cylinder"
"During a TXV repair, refrigerant was recovered from the system. The refrigerant ___________. -
CORRECT ANSWER=> can be charged back into the same system after repairs are made and the
system is leak checked and properly evacuated"
"A system with a large liquid receiver needs a major system repair to replace a faulty TXV. When
servicing the unit ________. - CORRECT ANSWER=> the refrigerant should be recovered to or
isolated in the receiver"
"EPA-approved recycling and recovery equipment must __________. - CORRECT ANSWER=> a. be
tested by an EPA-approved third party and have a label verifying it meets EPA requirements
b. be equipped with low-loss fittings
c. be certified for use with the refrigerant being recovered or recycled"
"You are changing out the compressor of a system containing 40 pounds of R-404A, you must
_____________. - CORRECT ANSWER=> isolate the compressor, evacuate the isolated section of
the system to 0 psig, and if system pressure does not rise after a few minutes, remove the
compressor"
3|Page
, "After reaching the required recovery vacuum on a system, ________. - CORRECT ANSWER=>
wait at least a few minutes to see if the system pressure rises"
"You have to open an R-410A system with a normal charge of 250 pounds, to replace a
compressor, you must evacuate the system to _______. - CORRECT ANSWER=> 10 inches Hg
vacuum"
"If leaks in a system make the recovery to a required evacuation level unattainable or if reaching
this level of evacuation would draw air into the recovered refrigerant, you are only required to
recover down to a pressure of _______. - CORRECT ANSWER=> 0 psig"
"Which repair is ALWAYS considered "major system repair" under EPA's regulations? - CORRECT
ANSWER=> replacement of a condenser"
"It is against EPA regulations to use system-dependent recovery unit when the _______. -
CORRECT ANSWER=> appliance contains over 15 pounds of refrigerant"
"To determine the type of refrigerant used in a 90 ton packaged rooftop unit, __________. -
CORRECT ANSWER=> check the unit nameplate"
"Oil foaming usually occurs in the ______. - CORRECT ANSWER=> compressor"
"Is a hermetic compressor is activated while under a deep vacuum, the ________. - CORRECT
ANSWER=> motor windings could be damaged"
"An oversized vacuum pump can cause __________ during evacuation. - CORRECT ANSWER=>
water in the system to freeze"
"An equipment room refrigerant detector is not required under ASHRAE Standard 15 to detect
________, but the ventilation system must operate continuously. - CORRECT ANSWER=> R-717"
"Every refrigerating system must be protected by _______. - CORRECT ANSWER=> a pressure
relief device"
"A hydrostatic tube test kit is used to _______. - CORRECT ANSWER=> find if there is a leak in the
tube"
4|Page
