©THESTAR 2024/2025 ALL RIGHTS RESERVED 12:43 PM.
EPA Section 608 Core Exam Questions With
Correct Answers 100% Verified.
What does ozone in the stratosphere above the earth consist of? - Answer✔Molecules
containing 3 oxygen atoms
Which of the following refrigerants has the lowest global warming potential? - Answer✔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? -
Answer✔Carbon Dioxide
Which type of refrigerant typically has the lowest global warming potential? - Answer✔HFOs
What is the state of refrigerant entering the compressor of a refrigeration system? -
Answer✔Low pressure vapor
Why are HFO refrigerants less flammable than hydrocarbon refrigerants? - Answer✔They
contain fluorine
What does a Section 608 certification allow a technician to do? - Answer✔Purchase or handle
controlled refrigerants
Which type of refrigerant has the highest ozone depletion potential? - Answer✔CFCs
1
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 12:43 PM.
Which of the following refrigerants contains chlorine? - Answer✔a. R-22
b. R-134a
c. R-410A
d. R-1234yf
a. R-22
HFC refrigerants contain what elements - Answer✔Hydrogen, Fluorine, and Carbon
What is being done in the U.S. to stop damage to the stratospheric ozone layer? -
Answer✔Phasing out the use of chlorofluorcarbons and hydrochloroflurocarbons
How should disposable cylinders of CFCs, HCFCs, and HFCs be discarded? - Answer✔Remove all
remaining refrigerant, render the cylinder useless, and recycle the metal
In addition to fines and being required to appear in court, what penalty can be imposed on
service technicians who violate Clean Air Act provisions? - Answer✔They may lose their
certification
For an appliance that uses a CFC, HCFC, or HFC refrigerant, which of the following violates the
prohibition on venting? - Answer✔Refrigerants emitted when cutting a line without properly
evacuating the appliance
What word applies to the process that returns refrigerant to new product specifications and
that requires chemical analysis? - Answer✔Reclaim
What synthetic lubricant is presently used with ternary blends containing HCFCs? -
Answer✔Alkylbenzene
How should refrigerant blends be charged? - Answer✔As a liquid
What unit does a compound pressure gauge for the low side of the system measure pressure
in? - Answer✔Psig and Inches of mercury ( in. Hg)
What process applies to cleaning refrigerant for immediate reuse by oil separation and single or
multiple passes through devices, like replaceable core filter driers, which reduce moisture and
acidity? - Answer✔Recycling
2
EPA Section 608 Core Exam Questions With
Correct Answers 100% Verified.
What does ozone in the stratosphere above the earth consist of? - Answer✔Molecules
containing 3 oxygen atoms
Which of the following refrigerants has the lowest global warming potential? - Answer✔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? -
Answer✔Carbon Dioxide
Which type of refrigerant typically has the lowest global warming potential? - Answer✔HFOs
What is the state of refrigerant entering the compressor of a refrigeration system? -
Answer✔Low pressure vapor
Why are HFO refrigerants less flammable than hydrocarbon refrigerants? - Answer✔They
contain fluorine
What does a Section 608 certification allow a technician to do? - Answer✔Purchase or handle
controlled refrigerants
Which type of refrigerant has the highest ozone depletion potential? - Answer✔CFCs
1
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 12:43 PM.
Which of the following refrigerants contains chlorine? - Answer✔a. R-22
b. R-134a
c. R-410A
d. R-1234yf
a. R-22
HFC refrigerants contain what elements - Answer✔Hydrogen, Fluorine, and Carbon
What is being done in the U.S. to stop damage to the stratospheric ozone layer? -
Answer✔Phasing out the use of chlorofluorcarbons and hydrochloroflurocarbons
How should disposable cylinders of CFCs, HCFCs, and HFCs be discarded? - Answer✔Remove all
remaining refrigerant, render the cylinder useless, and recycle the metal
In addition to fines and being required to appear in court, what penalty can be imposed on
service technicians who violate Clean Air Act provisions? - Answer✔They may lose their
certification
For an appliance that uses a CFC, HCFC, or HFC refrigerant, which of the following violates the
prohibition on venting? - Answer✔Refrigerants emitted when cutting a line without properly
evacuating the appliance
What word applies to the process that returns refrigerant to new product specifications and
that requires chemical analysis? - Answer✔Reclaim
What synthetic lubricant is presently used with ternary blends containing HCFCs? -
Answer✔Alkylbenzene
How should refrigerant blends be charged? - Answer✔As a liquid
What unit does a compound pressure gauge for the low side of the system measure pressure
in? - Answer✔Psig and Inches of mercury ( in. Hg)
What process applies to cleaning refrigerant for immediate reuse by oil separation and single or
multiple passes through devices, like replaceable core filter driers, which reduce moisture and
acidity? - Answer✔Recycling
2
