EPA Certification Exam Questions and
Answers latest 2025/2026 A+ Graded 100%
Verified.
True or false: CFCs neither dissolve in water nor break down into compounds that
dissolve in water, so they do not rain out of the atmosphere. - ANS- True
How many ozone molecules will one chlorine atom destroy? - ANS- 100,000
What does ODP stand for? - ANS- ozone depletion potential
What is ODP? - ANS- the measurement of CFC's and HCFC's ability to destroy ozone
Which refrigerant is the most harmful to the ozone layer? - ANS- R-12 CFC
The Clean Air Act prohibits venting of CFCs and HCFCs as of - ANS- July 1, 1992
The Clean Air Act prohibits venting of HFCs as of - ANS- November 15, 1995
The Clean Air Act requires a service technician to be EPA certified as of - ANS-
November 14, 1994
When disposing of a refrigerant cylinder, - ANS- recover the refrigerant and render the
cylinder useless
When is it most likely that an appliance will need its refrigerant recovered? - ANS- before
it can be discarded
What is known as de minimis releases? - ANS- It is a minimum amount of refrigerant that
can be released to the atmosphere when servicing equipment.
What does the term temperature glide refer to? - ANS- the different refrigerant boiling
and condensing points of a blended refrigerant
Service technicians who violate the Clean Air Act - ANS- may be fined and may lose
certification.
, How much of a fine can be issued for venting refrigerants? - ANS- $27,500
An award of _____ is given to the person who supplies information about the venting of
refrigerants. - ANS- $10,000
What is fractionation - ANS- the separation of blended refrigerants caused by different
refrigerant vapor pressures
What is the pressure range of the high-side gauge that is located on a manifold set? -
ANS- 0 psig to 500 psig
Which mixture is legal to add into a system for the purpose of leak testing? - ANS- a
trace amount of R-22 and nitrogen
Hygroscopic oil is oil that - ANS- has a high attraction to moisture.
What is the state of the refrigerant leaving the condenser? - ANS- high-pressure liquid
What is the color code of refrigerant gauges? - ANS- low side is blue, high side is red
Which is considered recycling? - ANS- removing, filtering, and reusing refrigerant in a
system
Refrigerant cylinders should be - ANS- free of rust as well as non-dented and
undamaged.
Which leak detector will help locate the general area of a system's leak? - ANS-
electronic/ultrasonic
What makes it impossible to reclaim a refrigerant? - ANS- having two different
refrigerants in one container
Factors that affect the speed of evacuation are - ANS- the size of equipment, the ambient
temperature, and the amount of moisture in the system.
To prevent an explosion, never fill a refrigerant cylinder more than - ANS- 80% full
Refrigerant can cause suffocation because - ANS- it is heavier than air and it displaces
oxygen
The Montreal Protocol is - ANS- a treaty regulating the production of CFCs.
Which refrigerant is an HCFC? - ANS- R-22
Answers latest 2025/2026 A+ Graded 100%
Verified.
True or false: CFCs neither dissolve in water nor break down into compounds that
dissolve in water, so they do not rain out of the atmosphere. - ANS- True
How many ozone molecules will one chlorine atom destroy? - ANS- 100,000
What does ODP stand for? - ANS- ozone depletion potential
What is ODP? - ANS- the measurement of CFC's and HCFC's ability to destroy ozone
Which refrigerant is the most harmful to the ozone layer? - ANS- R-12 CFC
The Clean Air Act prohibits venting of CFCs and HCFCs as of - ANS- July 1, 1992
The Clean Air Act prohibits venting of HFCs as of - ANS- November 15, 1995
The Clean Air Act requires a service technician to be EPA certified as of - ANS-
November 14, 1994
When disposing of a refrigerant cylinder, - ANS- recover the refrigerant and render the
cylinder useless
When is it most likely that an appliance will need its refrigerant recovered? - ANS- before
it can be discarded
What is known as de minimis releases? - ANS- It is a minimum amount of refrigerant that
can be released to the atmosphere when servicing equipment.
What does the term temperature glide refer to? - ANS- the different refrigerant boiling
and condensing points of a blended refrigerant
Service technicians who violate the Clean Air Act - ANS- may be fined and may lose
certification.
, How much of a fine can be issued for venting refrigerants? - ANS- $27,500
An award of _____ is given to the person who supplies information about the venting of
refrigerants. - ANS- $10,000
What is fractionation - ANS- the separation of blended refrigerants caused by different
refrigerant vapor pressures
What is the pressure range of the high-side gauge that is located on a manifold set? -
ANS- 0 psig to 500 psig
Which mixture is legal to add into a system for the purpose of leak testing? - ANS- a
trace amount of R-22 and nitrogen
Hygroscopic oil is oil that - ANS- has a high attraction to moisture.
What is the state of the refrigerant leaving the condenser? - ANS- high-pressure liquid
What is the color code of refrigerant gauges? - ANS- low side is blue, high side is red
Which is considered recycling? - ANS- removing, filtering, and reusing refrigerant in a
system
Refrigerant cylinders should be - ANS- free of rust as well as non-dented and
undamaged.
Which leak detector will help locate the general area of a system's leak? - ANS-
electronic/ultrasonic
What makes it impossible to reclaim a refrigerant? - ANS- having two different
refrigerants in one container
Factors that affect the speed of evacuation are - ANS- the size of equipment, the ambient
temperature, and the amount of moisture in the system.
To prevent an explosion, never fill a refrigerant cylinder more than - ANS- 80% full
Refrigerant can cause suffocation because - ANS- it is heavier than air and it displaces
oxygen
The Montreal Protocol is - ANS- a treaty regulating the production of CFCs.
Which refrigerant is an HCFC? - ANS- R-22
