EPA EXAM VERSION D34 | QUESTIONS AND ANSWERS | 2026 UPDATE | WITH
COMPLETE SOLUTION
which of the following gases is used as the baseline measurement for global warming potential? -
(answer)carbon dioxide
how does the global warming potential of R-410A compare to carbon dioxide? - (answer)it is thousands
of times greater
how do the global warming potentials of isobutane (R-600a), propane (R-290_ and R-441A compare to
the GWPs of HFC-134a, R-404A and R-410A? - (answer)they are significantly lower
which of the following refrigerants is an HFO? - (answer)R-1234yf
Which of the following is a "high-pressure refrigerant" under EPA's section 608 regulations? - (answer)R-
410A
Which of the following gases help form the earth's protective shield? - (answer)Stratospheric Ozone
HCFC refrigerants contain which of the following - (answer)hydrogen, chlorine, fluorine, and carbon
Which of the following refrigerants damages stratospheric ozone? - (answer)HCFCs
what is the strongest evidence that HCFCs are in the stratosphere - (answer)measurement of HCFCs in
air samples from the stratosphere
which of the following is not a violation of the Clean Air Act or EPA's regulation? - (answer)knowingly
recovering an exempt refrigerant
which of the following is not a violation of the refrigerant management regulations under the Clean Air
Act? - (answer)Servicing a system that uses CFCs or HCFCs after the phaseout of those refrigerants.
, EPA EXAM VERSION D34 | QUESTIONS AND ANSWERS | 2026 UPDATE | WITH
COMPLETE SOLUTION
What is the phaseout date for the production and import of new R-22 in the U.S.? - (answer)2020
Which refrigerants) must be recovered before opening or disposing of appliances? - (answer)HFCs, CFCs,
HCFCs
Which of the following appliances is not covered by EPA Section 608 regulations? - (answer)Desiccant
dehumidifiers
What happens if EPA regulations change after a technician becomes certified? - (answer)It will be the
technicians responsibility to comply with any future changes in the law
Which of the following is an approved 'drop-in' service replacement for R-22? - (answer)There are no
direct drop-in refrigerant substitutes.
What type of synthetic oils are commonly used in new HFC systems and for retrofitting HCFC equipment
to HFC refrigerants? - (answer)Polyolester
In what state does refrigerant enter the compressor of a refrigeration system? - (answer)superheated
vapor
What is the term for removing refrigerant in any condition from a system and storing it in an external
container without necessarily testing or processing it in any way? - (answer)recovering
What gas should be used to leak check a system designed for use with R-410A that has been opened for
a major system repair? - (answer)pressurized nitrogen
Why is important NOT to mix different refrigerants in the same container when recovering refrigerant? -
(answer)the mixture may be impossible to reclaim
COMPLETE SOLUTION
which of the following gases is used as the baseline measurement for global warming potential? -
(answer)carbon dioxide
how does the global warming potential of R-410A compare to carbon dioxide? - (answer)it is thousands
of times greater
how do the global warming potentials of isobutane (R-600a), propane (R-290_ and R-441A compare to
the GWPs of HFC-134a, R-404A and R-410A? - (answer)they are significantly lower
which of the following refrigerants is an HFO? - (answer)R-1234yf
Which of the following is a "high-pressure refrigerant" under EPA's section 608 regulations? - (answer)R-
410A
Which of the following gases help form the earth's protective shield? - (answer)Stratospheric Ozone
HCFC refrigerants contain which of the following - (answer)hydrogen, chlorine, fluorine, and carbon
Which of the following refrigerants damages stratospheric ozone? - (answer)HCFCs
what is the strongest evidence that HCFCs are in the stratosphere - (answer)measurement of HCFCs in
air samples from the stratosphere
which of the following is not a violation of the Clean Air Act or EPA's regulation? - (answer)knowingly
recovering an exempt refrigerant
which of the following is not a violation of the refrigerant management regulations under the Clean Air
Act? - (answer)Servicing a system that uses CFCs or HCFCs after the phaseout of those refrigerants.
, EPA EXAM VERSION D34 | QUESTIONS AND ANSWERS | 2026 UPDATE | WITH
COMPLETE SOLUTION
What is the phaseout date for the production and import of new R-22 in the U.S.? - (answer)2020
Which refrigerants) must be recovered before opening or disposing of appliances? - (answer)HFCs, CFCs,
HCFCs
Which of the following appliances is not covered by EPA Section 608 regulations? - (answer)Desiccant
dehumidifiers
What happens if EPA regulations change after a technician becomes certified? - (answer)It will be the
technicians responsibility to comply with any future changes in the law
Which of the following is an approved 'drop-in' service replacement for R-22? - (answer)There are no
direct drop-in refrigerant substitutes.
What type of synthetic oils are commonly used in new HFC systems and for retrofitting HCFC equipment
to HFC refrigerants? - (answer)Polyolester
In what state does refrigerant enter the compressor of a refrigeration system? - (answer)superheated
vapor
What is the term for removing refrigerant in any condition from a system and storing it in an external
container without necessarily testing or processing it in any way? - (answer)recovering
What gas should be used to leak check a system designed for use with R-410A that has been opened for
a major system repair? - (answer)pressurized nitrogen
Why is important NOT to mix different refrigerants in the same container when recovering refrigerant? -
(answer)the mixture may be impossible to reclaim
