EPA 608 UNIVERSAL EXAMPREP QUESTIONS
AND DETAILED SOLUTIONS
◉ De minimis release
Answer: Unavoidable minor release during good-faith recovery,
recycling, or disposal attempts.
◉ Normal operation release
Answer: Minor leaks during normal operation, treated separately
from prohibited service venting.
◉ Ozone layer
Answer: Stratospheric layer protecting Earth by filtering harmful
ultraviolet (UV) radiation.
◉ Ozone depletion
Answer: Destruction of stratospheric ozone caused by ozone-
depleting chemicals.
◉ UV radiation
Answer: Harmful ultraviolet rays emitted by the sun.
,◉ Why ozone depletion is dangerous
Answer: Increases UV radiation reaching Earth, harming human
health, crops, and marine ecosystems.
◉ ODP
Answer: Ozone Depletion Potential; measures a substance's
capability to destroy stratospheric ozone.
◉ GWP
Answer: Global Warming Potential; measures greenhouse gas
impact relative to carbon dioxide.
◉ Chlorine and ozone
Answer: Chlorine atoms released from refrigerants break down
ozone molecules.
◉ Bromine and ozone
Answer: Bromine compounds destroy stratospheric ozone rapidly
and extensively.
◉ CFC
Answer: Chlorofluorocarbon; refrigerant containing chlorine,
fluorine, and carbon.
,◉ HCFC
Answer: Hydrochlorofluorocarbon; refrigerant containing hydrogen,
chlorine, fluorine, and carbon.
◉ HFC
Answer: Hydrofluorocarbon; refrigerant containing hydrogen,
fluorine, and carbon (zero chlorine).
◉ HFO
Answer: Hydrofluoroolefin; modern refrigerant family with zero
ODP and very low GWP.
◉ CFC ozone effect
Answer: CFCs possess high Ozone Depletion Potential due to
chlorine content.
◉ HCFC ozone effect
Answer: HCFCs deplete ozone, but have lower ODP than CFCs.
◉ HFC ozone effect
Answer: HFCs have zero Ozone Depletion Potential because they
contain no chlorine.
, ◉ HFC environmental issue
Answer: HFCs do not deplete ozone but exhibit high Global Warming
Potential.
◉ CFC examples
Answer: R-11, R-12, R-113, R-114, R-115.
◉ HCFC example
Answer: R-22.
◉ HFC examples
Answer: R-134a, R-410A, R-404A, R-407C.
◉ R-12 refrigerant family
Answer: CFC family.
◉ R-22 refrigerant family
Answer: HCFC family.
◉ R-134a refrigerant family
Answer: HFC family.
AND DETAILED SOLUTIONS
◉ De minimis release
Answer: Unavoidable minor release during good-faith recovery,
recycling, or disposal attempts.
◉ Normal operation release
Answer: Minor leaks during normal operation, treated separately
from prohibited service venting.
◉ Ozone layer
Answer: Stratospheric layer protecting Earth by filtering harmful
ultraviolet (UV) radiation.
◉ Ozone depletion
Answer: Destruction of stratospheric ozone caused by ozone-
depleting chemicals.
◉ UV radiation
Answer: Harmful ultraviolet rays emitted by the sun.
,◉ Why ozone depletion is dangerous
Answer: Increases UV radiation reaching Earth, harming human
health, crops, and marine ecosystems.
◉ ODP
Answer: Ozone Depletion Potential; measures a substance's
capability to destroy stratospheric ozone.
◉ GWP
Answer: Global Warming Potential; measures greenhouse gas
impact relative to carbon dioxide.
◉ Chlorine and ozone
Answer: Chlorine atoms released from refrigerants break down
ozone molecules.
◉ Bromine and ozone
Answer: Bromine compounds destroy stratospheric ozone rapidly
and extensively.
◉ CFC
Answer: Chlorofluorocarbon; refrigerant containing chlorine,
fluorine, and carbon.
,◉ HCFC
Answer: Hydrochlorofluorocarbon; refrigerant containing hydrogen,
chlorine, fluorine, and carbon.
◉ HFC
Answer: Hydrofluorocarbon; refrigerant containing hydrogen,
fluorine, and carbon (zero chlorine).
◉ HFO
Answer: Hydrofluoroolefin; modern refrigerant family with zero
ODP and very low GWP.
◉ CFC ozone effect
Answer: CFCs possess high Ozone Depletion Potential due to
chlorine content.
◉ HCFC ozone effect
Answer: HCFCs deplete ozone, but have lower ODP than CFCs.
◉ HFC ozone effect
Answer: HFCs have zero Ozone Depletion Potential because they
contain no chlorine.
, ◉ HFC environmental issue
Answer: HFCs do not deplete ozone but exhibit high Global Warming
Potential.
◉ CFC examples
Answer: R-11, R-12, R-113, R-114, R-115.
◉ HCFC example
Answer: R-22.
◉ HFC examples
Answer: R-134a, R-410A, R-404A, R-407C.
◉ R-12 refrigerant family
Answer: CFC family.
◉ R-22 refrigerant family
Answer: HCFC family.
◉ R-134a refrigerant family
Answer: HFC family.
