EPA 609 FINAL EXAM 2026 ACTUAL QUESTIONS AND
ANSWERS GRADED A+
✔✔The "ozone layer" consists of ozone in which part of the atmosphere? -
✔✔stratosphere
✔✔The primary cause of over-pressurization of refrigeration cylinder is due to
overheating? - ✔✔True
✔✔R-134a is flammable at ambient temperatures and atmospheric pressures? -
✔✔False
✔✔The thermodynamic properties of HFC-134a are similar to CFC-12? - ✔✔True
✔✔The color code for R-12 disposable refrigerant cylinders is ______? - ✔✔White
✔✔_______ has replaced CFC-12 in all automotive applications? - ✔✔HFC-134a
✔✔Since ______, it has been illegal to vent substitutes for CFC 3. and HCFC
refrigerants? - ✔✔November 15, 1995
✔✔As per the CAA, all records related to entities of MVAC system services must be
maintained for ________ years? - ✔✔3
✔✔Since _______, it has been mandatory to recycle HFC-134a as well as any other
automotive refrigerant before returning to that MVAC or sold? - ✔✔January 29, 1998
✔✔Which of the following will not react with ozone gas? - ✔✔Fluorine
✔✔Halons were completely phased out by 1994? - ✔✔True
✔✔Average ozone concentration in Earth's atmosphere as a whole is only about
______ parts per million? - ✔✔0.3
✔✔R-134a disposable refrigerant cylinder is ________ color coded? - ✔✔Light blue
✔✔The sale of small containers of refrigerant under _______, including the one pound
cans, are restricted to only people certified in Section 609? - ✔✔20 Ib
✔✔Use of Carbon dioxide (R-744) refrigerant results into a ______ efficiency cycle? -
✔✔Much lower
, ✔✔Recovery cylinders are painted yellow in the shoulder area and _____ down the
side? - ✔✔12 inches
✔✔Disposable cylinders are manufactured from? - ✔✔Steel
✔✔Technicians who repair or service HFC-134a MVACs must be trained and certified
by an EPA-approved organization? - ✔✔True
✔✔HFC-134a refrigerant has an Ozone Depletion Potential of? - ✔✔0.0
✔✔Ozone layer is present in both Stratosphere and mesosphere layers of earth's
atmosphere? - ✔✔False
✔✔R-134a refrigerant has low solubility in non-polar lubricant? - ✔✔True
✔✔Moisture content in recycled R-134a (HFC-134a) that has been directly removed
from and intended to be returned to a mobile air-conditioning system cannot exceed
_______ by weight? - ✔✔50 PPM
✔✔Disposable cylinders are manufactured to specifications established by? - ✔✔DOT
✔✔ Lifetime of CFCs is believed to range from _____ years? - ✔✔2 to 100
✔✔For determining the Ozone Depletion Potential ________ having been assigned a
factor of 1? - ✔✔CFC-11
✔✔Ester-based synthetic oils can be mixed with other oils? - ✔✔False
✔✔Since ________, it is no longer legal for CFCs to be manufactured or imported into
the United States? - ✔✔January 1, 1996
✔✔Since _____, it is illegal to vent substitutes for CFC and HCFC refrigerants? -
✔✔November 15, 1995
✔✔Ozone at ground level ans at Stratosphere is a harmful pollutant? - ✔✔False
✔✔A refillable refrigerant cylinder must not be filled above ______ of its full capacity? -
✔✔80%
✔✔Each chlorine ion can able to destroy ______ ozone mole? - ✔✔100,000
✔✔R-134a is a chlorine-free refrigerant? - ✔✔True
ANSWERS GRADED A+
✔✔The "ozone layer" consists of ozone in which part of the atmosphere? -
✔✔stratosphere
✔✔The primary cause of over-pressurization of refrigeration cylinder is due to
overheating? - ✔✔True
✔✔R-134a is flammable at ambient temperatures and atmospheric pressures? -
✔✔False
✔✔The thermodynamic properties of HFC-134a are similar to CFC-12? - ✔✔True
✔✔The color code for R-12 disposable refrigerant cylinders is ______? - ✔✔White
✔✔_______ has replaced CFC-12 in all automotive applications? - ✔✔HFC-134a
✔✔Since ______, it has been illegal to vent substitutes for CFC 3. and HCFC
refrigerants? - ✔✔November 15, 1995
✔✔As per the CAA, all records related to entities of MVAC system services must be
maintained for ________ years? - ✔✔3
✔✔Since _______, it has been mandatory to recycle HFC-134a as well as any other
automotive refrigerant before returning to that MVAC or sold? - ✔✔January 29, 1998
✔✔Which of the following will not react with ozone gas? - ✔✔Fluorine
✔✔Halons were completely phased out by 1994? - ✔✔True
✔✔Average ozone concentration in Earth's atmosphere as a whole is only about
______ parts per million? - ✔✔0.3
✔✔R-134a disposable refrigerant cylinder is ________ color coded? - ✔✔Light blue
✔✔The sale of small containers of refrigerant under _______, including the one pound
cans, are restricted to only people certified in Section 609? - ✔✔20 Ib
✔✔Use of Carbon dioxide (R-744) refrigerant results into a ______ efficiency cycle? -
✔✔Much lower
, ✔✔Recovery cylinders are painted yellow in the shoulder area and _____ down the
side? - ✔✔12 inches
✔✔Disposable cylinders are manufactured from? - ✔✔Steel
✔✔Technicians who repair or service HFC-134a MVACs must be trained and certified
by an EPA-approved organization? - ✔✔True
✔✔HFC-134a refrigerant has an Ozone Depletion Potential of? - ✔✔0.0
✔✔Ozone layer is present in both Stratosphere and mesosphere layers of earth's
atmosphere? - ✔✔False
✔✔R-134a refrigerant has low solubility in non-polar lubricant? - ✔✔True
✔✔Moisture content in recycled R-134a (HFC-134a) that has been directly removed
from and intended to be returned to a mobile air-conditioning system cannot exceed
_______ by weight? - ✔✔50 PPM
✔✔Disposable cylinders are manufactured to specifications established by? - ✔✔DOT
✔✔ Lifetime of CFCs is believed to range from _____ years? - ✔✔2 to 100
✔✔For determining the Ozone Depletion Potential ________ having been assigned a
factor of 1? - ✔✔CFC-11
✔✔Ester-based synthetic oils can be mixed with other oils? - ✔✔False
✔✔Since ________, it is no longer legal for CFCs to be manufactured or imported into
the United States? - ✔✔January 1, 1996
✔✔Since _____, it is illegal to vent substitutes for CFC and HCFC refrigerants? -
✔✔November 15, 1995
✔✔Ozone at ground level ans at Stratosphere is a harmful pollutant? - ✔✔False
✔✔A refillable refrigerant cylinder must not be filled above ______ of its full capacity? -
✔✔80%
✔✔Each chlorine ion can able to destroy ______ ozone mole? - ✔✔100,000
✔✔R-134a is a chlorine-free refrigerant? - ✔✔True
