NEW EPA 608 EXAM PRACTICE
QUESTIONS
UPDATED AND VERIFIED QUESTION BANK
WITH CORRECT
ANSWERS 2026/2027 LATEST
What is being done in the U.S. to stop damage to the stratospheric ozone
layer? - CORRECT ANSWER>>>>Eliminating the use of CFCs and
HCFCs refrigerants
EPA regulations require appliances to have . - ✔✔✔ANSWER>>>>a
service
aperture or process hub
The release of any CFC, HCFC, or HFC refrigerant during is illegal. -
CORRECT ANSWER>>>>theft of equipment
is the only EPA SNAP approved "drop in" replacement for
Page 1 of 16
,R-22. - ✔✔✔ANSWER>>>>There are no direct drop-in refrigerant
substitutes
Ester-based oils like POE can be mixed with . - ✔✔✔ANSWER>>>>no
other
oils
What provides the cooling in a vapor compression refrigeration system?
- CORRECT ANSWER>>>>The vaporization of the liquid refrigerant
An oil sample might be taken when . - ✔✔✔ANSWER>>>>a.
moisture and/or acid problems are suspected
b. oil sludge formation or oil waxing is suspected
c. residual acidic oil from a burn-out is suspected of contaminating the
replacement oil
returns refrigerant to new product specifications and requires
chemical analysis to verify the purity to AHRI-700 standards. -
✔✔✔ANSWER>>>>reclaiming
Ozone depletion is caused by in HFC refrigerants. - CORRECT
ANSWER>>>>chlorine
Page 2 of 16
, CFCs and HCFCs making them capable capable of reaching the
stratospheric ozone layer. - ✔✔✔ANSWER>>>>do not dissolve in
water or easily break down in the atmosphere
According to the Rolanda-Molina theory, are destroyed by each chlorine
atom in the stratosphere. - ✔✔✔ANSWER>>>>100,000 ozone
molecules
The stratospheric ozone layer protects us from .-
✔✔✔ANSWER>>>>ultraviolet radiation from the sun
Which health effect increases from loss of the stratospheric ozone layer?
- CORRECT ANSWER>>>>cases of cataracts or skin cancer
What proves that HCFCs are in the stratosphere? -
✔✔✔ANSWER>>>>HCFCs found in air samples from the
stratosphere.
What makes HFC refrigerants damaging to the environment? -
✔✔✔ANSWER>>>>They can have very high global warming
potentials.
makes HFO refrigerants less flammable than HC refrigerants. -
CORRECT
ANSWER>>>>Flourine
Which refrigerant contains chlorine? - ✔✔✔ANSWER>>>>R-12
Page 3 of 16
QUESTIONS
UPDATED AND VERIFIED QUESTION BANK
WITH CORRECT
ANSWERS 2026/2027 LATEST
What is being done in the U.S. to stop damage to the stratospheric ozone
layer? - CORRECT ANSWER>>>>Eliminating the use of CFCs and
HCFCs refrigerants
EPA regulations require appliances to have . - ✔✔✔ANSWER>>>>a
service
aperture or process hub
The release of any CFC, HCFC, or HFC refrigerant during is illegal. -
CORRECT ANSWER>>>>theft of equipment
is the only EPA SNAP approved "drop in" replacement for
Page 1 of 16
,R-22. - ✔✔✔ANSWER>>>>There are no direct drop-in refrigerant
substitutes
Ester-based oils like POE can be mixed with . - ✔✔✔ANSWER>>>>no
other
oils
What provides the cooling in a vapor compression refrigeration system?
- CORRECT ANSWER>>>>The vaporization of the liquid refrigerant
An oil sample might be taken when . - ✔✔✔ANSWER>>>>a.
moisture and/or acid problems are suspected
b. oil sludge formation or oil waxing is suspected
c. residual acidic oil from a burn-out is suspected of contaminating the
replacement oil
returns refrigerant to new product specifications and requires
chemical analysis to verify the purity to AHRI-700 standards. -
✔✔✔ANSWER>>>>reclaiming
Ozone depletion is caused by in HFC refrigerants. - CORRECT
ANSWER>>>>chlorine
Page 2 of 16
, CFCs and HCFCs making them capable capable of reaching the
stratospheric ozone layer. - ✔✔✔ANSWER>>>>do not dissolve in
water or easily break down in the atmosphere
According to the Rolanda-Molina theory, are destroyed by each chlorine
atom in the stratosphere. - ✔✔✔ANSWER>>>>100,000 ozone
molecules
The stratospheric ozone layer protects us from .-
✔✔✔ANSWER>>>>ultraviolet radiation from the sun
Which health effect increases from loss of the stratospheric ozone layer?
- CORRECT ANSWER>>>>cases of cataracts or skin cancer
What proves that HCFCs are in the stratosphere? -
✔✔✔ANSWER>>>>HCFCs found in air samples from the
stratosphere.
What makes HFC refrigerants damaging to the environment? -
✔✔✔ANSWER>>>>They can have very high global warming
potentials.
makes HFO refrigerants less flammable than HC refrigerants. -
CORRECT
ANSWER>>>>Flourine
Which refrigerant contains chlorine? - ✔✔✔ANSWER>>>>R-12
Page 3 of 16
