EPA 609 Practice
R-134a is a chlorine-free refrigerant - (correct Answer) - True
Ozone layer absorbs and scatters ________ from the sun - (correct Answer) - ultraviolet light
For determining the Ozone Depletion Potential ________ having been assigned a factor of 1 - (correct
Answer) - CFC-11
A refillable refrigerant cylinder must not be filled above ______ of its full capacity. - (correct Answer) -
80%
Ozone at ground level and at Stratosphere is a harmful pollutant - (correct Answer) - False
Each chlorine ion can able to destroy ______ ozone molecules - (correct Answer) - 100,000
Lifetime of CFCs is believed to range from _____ years - (correct Answer) - 20-100
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. - (correct Answer) - $10,000
Ester-based synthetic oils can be mixed with other oils - (correct Answer) - False
Since _____, it is illegal to vent substitutes for CFC and HCFC refrigerants - (correct Answer) - Nov 15,
1995
MVAC systems being disposed must be evacuated to _____ of mercury before being scrapped - (correct
Answer) - 4 inches
Since ________, it is no longer legal for CFCs to be manufactured or imported into the United States -
(correct Answer) - Jan 1, 1996
The Clean Air Act (CAA) of ______ directs EPA to establish requirements to prevent the release of ozone
depleting substances. - (correct Answer) - 1990
At high temperatures, CFC-12 can decompose to form _______ - (correct Answer) - hydrochloric and
hydrofluoric acid
Ozone molecule consists of ______ atoms of oxygen - (correct Answer) - three
CFCs are highly reactive in _____ of atmosphere - (correct Answer) - lower
Non-condensables in a refrigeration system result in a _______ discharge pressure - (correct Answer) -
higher
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. - (correct Answer)
- 15
, Over the road refrigeration units and R-22 (HCFC) air conditioning, such as that found in buses, also
requires Section ______ certification - (correct Answer) - 608
Ozone depletion increases global warming - (correct Answer) - True
Refrigerants are lighter than the air: - (correct Answer) - False
Stratosphere layer consists of about _____ of the available Ozone: - (correct Answer) - 90%
Every refrigerant cylinder need not be protected by some type of pressure relief device: - (correct
Answer) - False
If a technician is already trained and certified to handle CFC-12, he has to be re-certified to handle HFC-
134a - (correct Answer) - False
Which of the following refrigerants has high ozone-depletion potential: - (correct Answer) - CFCs
R-152a is a chemical compound composed of which of the following: (Multiple Answer Question) -
(correct Answer) - Carbon, Hydrogen, Fluorine
R-134a refrigerant does pose a cancer or birth defects hazard - (correct Answer) - False
External Recovery Tanks must be evacuated to ______ of mercury before being put into service - (correct
Answer) - 27 inches
Disposable Refrigerant Tanks, under _______ must be evacuated before being scrapped - (correct
Answer) - 20 pounds
HFC-134a, is the refrigerant that replaced _______ in automotive air conditioning systems - (correct
Answer) - R-12
Which of the following has the Ozone Depletion Potential (ODP) value of 1 - (correct Answer) - CFC-11
CFCs manufacture was discontinued as of _______ - (correct Answer) - January 1, 1996
______ of stratospheric chlorine comes from ozone-depleting substances - (correct Answer) - 82%
MVAC systems need not be evacuated to a vacuum before servicing - (correct Answer) - False
Supplies of CFC refrigerant for equipment servicing can ONLY come from which of the following: -
(correct Answer) - recovery, reclamation, and recycling
Which of the following in refrigerant makes them chemically less stable once they enter the atmosphere
- (correct Answer) - Hydrogen
CFCs deplete stratospheric ozone and that a "hole" had developed in the ozone layer over ______ -
(correct Answer) - Antarctica
______ has recently been approved for use in automobile applications as an alternative to R-134a -
(correct Answer) - R152a
HFCs and HCFCs decompose when released in the lower atmosphere: - (correct Answer) - True
R-134a is a chlorine-free refrigerant - (correct Answer) - True
Ozone layer absorbs and scatters ________ from the sun - (correct Answer) - ultraviolet light
For determining the Ozone Depletion Potential ________ having been assigned a factor of 1 - (correct
Answer) - CFC-11
A refillable refrigerant cylinder must not be filled above ______ of its full capacity. - (correct Answer) -
80%
Ozone at ground level and at Stratosphere is a harmful pollutant - (correct Answer) - False
Each chlorine ion can able to destroy ______ ozone molecules - (correct Answer) - 100,000
Lifetime of CFCs is believed to range from _____ years - (correct Answer) - 20-100
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. - (correct Answer) - $10,000
Ester-based synthetic oils can be mixed with other oils - (correct Answer) - False
Since _____, it is illegal to vent substitutes for CFC and HCFC refrigerants - (correct Answer) - Nov 15,
1995
MVAC systems being disposed must be evacuated to _____ of mercury before being scrapped - (correct
Answer) - 4 inches
Since ________, it is no longer legal for CFCs to be manufactured or imported into the United States -
(correct Answer) - Jan 1, 1996
The Clean Air Act (CAA) of ______ directs EPA to establish requirements to prevent the release of ozone
depleting substances. - (correct Answer) - 1990
At high temperatures, CFC-12 can decompose to form _______ - (correct Answer) - hydrochloric and
hydrofluoric acid
Ozone molecule consists of ______ atoms of oxygen - (correct Answer) - three
CFCs are highly reactive in _____ of atmosphere - (correct Answer) - lower
Non-condensables in a refrigeration system result in a _______ discharge pressure - (correct Answer) -
higher
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. - (correct Answer)
- 15
, Over the road refrigeration units and R-22 (HCFC) air conditioning, such as that found in buses, also
requires Section ______ certification - (correct Answer) - 608
Ozone depletion increases global warming - (correct Answer) - True
Refrigerants are lighter than the air: - (correct Answer) - False
Stratosphere layer consists of about _____ of the available Ozone: - (correct Answer) - 90%
Every refrigerant cylinder need not be protected by some type of pressure relief device: - (correct
Answer) - False
If a technician is already trained and certified to handle CFC-12, he has to be re-certified to handle HFC-
134a - (correct Answer) - False
Which of the following refrigerants has high ozone-depletion potential: - (correct Answer) - CFCs
R-152a is a chemical compound composed of which of the following: (Multiple Answer Question) -
(correct Answer) - Carbon, Hydrogen, Fluorine
R-134a refrigerant does pose a cancer or birth defects hazard - (correct Answer) - False
External Recovery Tanks must be evacuated to ______ of mercury before being put into service - (correct
Answer) - 27 inches
Disposable Refrigerant Tanks, under _______ must be evacuated before being scrapped - (correct
Answer) - 20 pounds
HFC-134a, is the refrigerant that replaced _______ in automotive air conditioning systems - (correct
Answer) - R-12
Which of the following has the Ozone Depletion Potential (ODP) value of 1 - (correct Answer) - CFC-11
CFCs manufacture was discontinued as of _______ - (correct Answer) - January 1, 1996
______ of stratospheric chlorine comes from ozone-depleting substances - (correct Answer) - 82%
MVAC systems need not be evacuated to a vacuum before servicing - (correct Answer) - False
Supplies of CFC refrigerant for equipment servicing can ONLY come from which of the following: -
(correct Answer) - recovery, reclamation, and recycling
Which of the following in refrigerant makes them chemically less stable once they enter the atmosphere
- (correct Answer) - Hydrogen
CFCs deplete stratospheric ozone and that a "hole" had developed in the ozone layer over ______ -
(correct Answer) - Antarctica
______ has recently been approved for use in automobile applications as an alternative to R-134a -
(correct Answer) - R152a
HFCs and HCFCs decompose when released in the lower atmosphere: - (correct Answer) - True
