EPA 608 Exam Practice Questions 1-100 verified answers A+ Grade
2026\2027 A+ Grade
Ozone depletion is caused by _______ in HFC refrigerants.
- correct answer chlorine
CFCs and HCFCs ________ making them capable capable of reaching the stratospheric ozone layer.
- correct 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.
- correct answer 100,000 ozone molecules
The stratospheric ozone layer protects us from _______.
- correct 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?
- correct answer HCFCs found in air samples from the stratosphere.
What makes HFC refrigerants damaging to the environment?
- correct answer They can have very high global warming potentials.
_______ makes HFO refrigerants less flammable than HC refrigerants.
- correct answer Flourine
Which refrigerant contains chlorine?
- correct answer R-12
, HFO refrigerants are miscible in _______ lubricants.
- correct answer POE lubricants
An example of HcFC refrigerant is: ______
- correct answer R-123
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 _________.
- correct 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
R-22.
- correct answer There are no direct drop-in refrigerant substitutes
Ester-based oils like POE can be mixed with ________.
- correct 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 __________.
- correct 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
2026\2027 A+ Grade
Ozone depletion is caused by _______ in HFC refrigerants.
- correct answer chlorine
CFCs and HCFCs ________ making them capable capable of reaching the stratospheric ozone layer.
- correct 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.
- correct answer 100,000 ozone molecules
The stratospheric ozone layer protects us from _______.
- correct 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?
- correct answer HCFCs found in air samples from the stratosphere.
What makes HFC refrigerants damaging to the environment?
- correct answer They can have very high global warming potentials.
_______ makes HFO refrigerants less flammable than HC refrigerants.
- correct answer Flourine
Which refrigerant contains chlorine?
- correct answer R-12
, HFO refrigerants are miscible in _______ lubricants.
- correct answer POE lubricants
An example of HcFC refrigerant is: ______
- correct answer R-123
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 _________.
- correct 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
R-22.
- correct answer There are no direct drop-in refrigerant substitutes
Ester-based oils like POE can be mixed with ________.
- correct 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 __________.
- correct 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
