EPA SECTION 608 CORE EXAM
QUESTIONS AND ANSWERS 100% PASS
What does ozone in the stratosphere above the earth consist of? - ANS Molecules containing
3 oxygen atoms
Which of the following refrigerants has the lowest global warming potential? - ANS a. R-134a
b. R-407C
c. R-410A
d. R-600a
d. R-600a (GWP - 3)
Which gas is used as the baseline measurement for global warming potential? - ANS Carbon
Dioxide
Which type of refrigerant typically has the lowest global warming potential? - ANS HFOs
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, What is the state of refrigerant entering the compressor of a refrigeration system? - ANS Low
pressure vapor
Why are HFO refrigerants less flammable than hydrocarbon refrigerants? - ANS They contain
fluorine
What does a Section 608 certification allow a technician to do? - ANS Purchase or handle
controlled refrigerants
Which type of refrigerant has the highest ozone depletion potential? - ANS CFCs
Which of the following refrigerants contains chlorine? - ANS a. R-22
b. R-134a
c. R-410A
d. R-1234yf
a. R-22
HFC refrigerants contain what elements - ANS Hydrogen, Fluorine, and Carbon
What is being done in the U.S. to stop damage to the stratospheric ozone layer? -
ANS Phasing out the use of chlorofluorcarbons and hydrochloroflurocarbons
How should disposable cylinders of CFCs, HCFCs, and HFCs be discarded? - ANS Remove all
remaining refrigerant, render the cylinder useless, and recycle the metal
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
QUESTIONS AND ANSWERS 100% PASS
What does ozone in the stratosphere above the earth consist of? - ANS Molecules containing
3 oxygen atoms
Which of the following refrigerants has the lowest global warming potential? - ANS a. R-134a
b. R-407C
c. R-410A
d. R-600a
d. R-600a (GWP - 3)
Which gas is used as the baseline measurement for global warming potential? - ANS Carbon
Dioxide
Which type of refrigerant typically has the lowest global warming potential? - ANS HFOs
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, What is the state of refrigerant entering the compressor of a refrigeration system? - ANS Low
pressure vapor
Why are HFO refrigerants less flammable than hydrocarbon refrigerants? - ANS They contain
fluorine
What does a Section 608 certification allow a technician to do? - ANS Purchase or handle
controlled refrigerants
Which type of refrigerant has the highest ozone depletion potential? - ANS CFCs
Which of the following refrigerants contains chlorine? - ANS a. R-22
b. R-134a
c. R-410A
d. R-1234yf
a. R-22
HFC refrigerants contain what elements - ANS Hydrogen, Fluorine, and Carbon
What is being done in the U.S. to stop damage to the stratospheric ozone layer? -
ANS Phasing out the use of chlorofluorcarbons and hydrochloroflurocarbons
How should disposable cylinders of CFCs, HCFCs, and HFCs be discarded? - ANS Remove all
remaining refrigerant, render the cylinder useless, and recycle the metal
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
