EPA SECTION 608 CERTIFICATION EXAM
PRACTICE QUESTIONS 1–100 2026
EDITION COMPREHENSIVE QUESTIONS
AND CORRECT ANSWERS WITH DETAILED
RATIONALES CORE, TYPE I, TYPE II, TYPE
III AND UNIVERSAL HVAC TECHNICIAN
CERTIFICATION STUDY GUIDE
If leaks in a system make the recovery to a required evacuation level
unattainable or if reaching this level of evacuation would draw air into the
recovered refrigerant, you are only required to recover down to a pressure
of _______. - CORRECT ANSWER -0 psig 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
PRACTICE QUESTIONS 1–100 2026
EDITION COMPREHENSIVE QUESTIONS
AND CORRECT ANSWERS WITH DETAILED
RATIONALES CORE, TYPE I, TYPE II, TYPE
III AND UNIVERSAL HVAC TECHNICIAN
CERTIFICATION STUDY GUIDE
If leaks in a system make the recovery to a required evacuation level
unattainable or if reaching this level of evacuation would draw air into the
recovered refrigerant, you are only required to recover down to a pressure
of _______. - CORRECT ANSWER -0 psig 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
