EPA 609 COMPREHENSIVE 2026 EXAM QUESTIONS AND
ANSWERS GRADED A+
✔✔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
✔✔MVAC systems being disposed must be evacuated to _____ of mercury before
being scrapped? - ✔✔4 inches
✔✔Ozone layer absorbs and scatters ________ from the sun? - ✔✔Ultraviolet light
✔✔An award of up to ______ may be paid to a person supplying information that leads
to a penalty against a technician who is intentionally venting? - ✔✔10,000
✔✔Every refrigerant cylinder need not be protected by some type of pressure relief
device? - ✔✔False
✔✔Ozone molecule consists of ______ atoms of oxygen? - ✔✔Three
, ✔✔CFCs are highly reactive in _____ of atmosphere? - ✔✔Lower level
✔✔Over the road refrigeration units and R-22 (HCFC) air conditioning, such as that
found in buses, also requires Section ______ certification? - ✔✔608
✔✔Stratosphere layer consists of about _____ of the available Ozone? - ✔✔90%
✔✔Moisture level in Recycled R-12 (CFC-12) that has been directly removed from, and
intended to be returned to, a mobile air-conditioning system cannot exceed _______
PPM by weight? - ✔✔15
✔✔Ozone depletion Increase global warming? - ✔✔True
✔✔Non-condensables in a refrigeration system result in a _______ discharge
pressure? - ✔✔Higher
✔✔At high temperaturesCFC-12 can decompose to form _______? - ✔✔Both options
are correct: hydrofluoric acid and hydrochloric acid
✔✔If a technician is already trained and certified to handle CFC-12, he has to be re-
certified to handle HFC-134a? - ✔✔False
✔✔The Clean Air Act (CAA) of ______ directs EPA to establish requirements to prevent
the release of ozone depleting substances? - ✔✔1990
✔✔Refrigerants are lighter than the air? - ✔✔False
✔✔External Recovery Tanks must be evacuated to ______ of mercury before being put
into service? - ✔✔27 inches
✔✔Disposable Refrigerant Tanks, under _______ must be evacuated before being
scrapped? - ✔✔20 pounds
✔✔______ of stratospheric chlorine comes from ozone-depleting substances? -
✔✔82%
✔✔Which of the following refrigerants has high ozone-depletion potential? - ✔✔CFCs
✔✔Supplies of CFC refrigerant for equipment servicing can ONLY come from which of
the following? - ✔✔All of the above recovery, recycle, reclaimation
ANSWERS GRADED A+
✔✔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
✔✔MVAC systems being disposed must be evacuated to _____ of mercury before
being scrapped? - ✔✔4 inches
✔✔Ozone layer absorbs and scatters ________ from the sun? - ✔✔Ultraviolet light
✔✔An award of up to ______ may be paid to a person supplying information that leads
to a penalty against a technician who is intentionally venting? - ✔✔10,000
✔✔Every refrigerant cylinder need not be protected by some type of pressure relief
device? - ✔✔False
✔✔Ozone molecule consists of ______ atoms of oxygen? - ✔✔Three
, ✔✔CFCs are highly reactive in _____ of atmosphere? - ✔✔Lower level
✔✔Over the road refrigeration units and R-22 (HCFC) air conditioning, such as that
found in buses, also requires Section ______ certification? - ✔✔608
✔✔Stratosphere layer consists of about _____ of the available Ozone? - ✔✔90%
✔✔Moisture level in Recycled R-12 (CFC-12) that has been directly removed from, and
intended to be returned to, a mobile air-conditioning system cannot exceed _______
PPM by weight? - ✔✔15
✔✔Ozone depletion Increase global warming? - ✔✔True
✔✔Non-condensables in a refrigeration system result in a _______ discharge
pressure? - ✔✔Higher
✔✔At high temperaturesCFC-12 can decompose to form _______? - ✔✔Both options
are correct: hydrofluoric acid and hydrochloric acid
✔✔If a technician is already trained and certified to handle CFC-12, he has to be re-
certified to handle HFC-134a? - ✔✔False
✔✔The Clean Air Act (CAA) of ______ directs EPA to establish requirements to prevent
the release of ozone depleting substances? - ✔✔1990
✔✔Refrigerants are lighter than the air? - ✔✔False
✔✔External Recovery Tanks must be evacuated to ______ of mercury before being put
into service? - ✔✔27 inches
✔✔Disposable Refrigerant Tanks, under _______ must be evacuated before being
scrapped? - ✔✔20 pounds
✔✔______ of stratospheric chlorine comes from ozone-depleting substances? -
✔✔82%
✔✔Which of the following refrigerants has high ozone-depletion potential? - ✔✔CFCs
✔✔Supplies of CFC refrigerant for equipment servicing can ONLY come from which of
the following? - ✔✔All of the above recovery, recycle, reclaimation
