EPA 608 Exam Study Guide - Core
Questions with correct Answers Already
Graded A+ 2025/2026
In VERY high pressure appliances, what type of refrigerant is used? - ANS- R-503
What device is at the end of the liquid line? - ANS- Expansion valve/Metering device
How much money does the EPA give to those who report others that are venting
refrigerants? - ANS- $10,000
Which of the following refrigerant groups does R-22 belong to? - ANS- HCFC
When inspecting for leaks in various systems, which gas should be used? - ANS-
Nitrogen
Which of the following terms best describes the process of changing a refrigerant from a
liquid to a gas through the use of heat? - ANS- Latent heating process
In a medium-pressure appliance, what type of refrigerant is used? - ANS- R-500
What class of refrigerant has the least amount of ozone depletion potential? - ANS- HFC
What phase and condition are the refrigerants in the suction line? - ANS- Cold vapor
The ozone layer in the stratosphere extends how many miles above the Earth's surface? -
ANS- 31 miles
Which of the following item(s) are a violation of the Clean Air Act?
A) Falsifying or failing to keep records
B) Failing to reach required evacuation levels before opening or disposing of appliances
C) Knowingly releasing CFC or HCFC refrigerants or their substitutes while repairing
appliances
D) All of the above - ANS- D - All of the above
In what year did the Montreal Protocol take place? - ANS- 1989
, What is generated when ozone reacts with a chlorine ion? - ANS- Oxygen
Despite the fact that R-22 is considered non-toxic, it:
A) Can cause asphyxia
B) is a Class I refrigerant
C) Is lighter than air
D) Can be detected by its color - ANS- A - Can cause asphyxia
When using a system-dependent recovery system on a compressor-operated appliance,
the technician should:
A) Never allow the refrigerant to go to the high side of the system
B) Install access fitting on both high and low-pressure sides of the system
C) Run the compressor and recover from the high side of the system only
D) Run the compressor and recover from the low side of the system only - ANS- C - Run
the compressor and recover from the high side of the system only
What standard must reclaimed refrigerant meet before it may be resold, according to EPA
regulations? - ANS- ARI 700
True or False: All refrigerant oils are hydroscopic. - ANS- True
Which of the following refrigerants is only used in disposable cylinders?
A) Recovery refrigerant
B) Either virgin or recovery refrigerant
C) Virgin refrigerant - ANS- C - Virgin refrigerant
Never pressurize a system with compressed air or oxygen because:
A) Oxygen and compressed air do not mix with refrigerants
B) When mixed with compressor oil or some refrigerants, it could explode
C) Leaking oxygen or compressed air is more difficult to detect than nitrogen
D) The pressure produced by either oxygen or compressed air are not as good as
nitrogen pressures - ANS- B - When mixed with compressor oil or some refrigerants, it
could explode
After 1995, the only source of CFC refrigerants for current refrigeration appliances in the
US was from:
A) Third-world chemical companies
B) Recovery and recycling
C) Solvent conversion - ANS- B - Recovery and recycling
Questions with correct Answers Already
Graded A+ 2025/2026
In VERY high pressure appliances, what type of refrigerant is used? - ANS- R-503
What device is at the end of the liquid line? - ANS- Expansion valve/Metering device
How much money does the EPA give to those who report others that are venting
refrigerants? - ANS- $10,000
Which of the following refrigerant groups does R-22 belong to? - ANS- HCFC
When inspecting for leaks in various systems, which gas should be used? - ANS-
Nitrogen
Which of the following terms best describes the process of changing a refrigerant from a
liquid to a gas through the use of heat? - ANS- Latent heating process
In a medium-pressure appliance, what type of refrigerant is used? - ANS- R-500
What class of refrigerant has the least amount of ozone depletion potential? - ANS- HFC
What phase and condition are the refrigerants in the suction line? - ANS- Cold vapor
The ozone layer in the stratosphere extends how many miles above the Earth's surface? -
ANS- 31 miles
Which of the following item(s) are a violation of the Clean Air Act?
A) Falsifying or failing to keep records
B) Failing to reach required evacuation levels before opening or disposing of appliances
C) Knowingly releasing CFC or HCFC refrigerants or their substitutes while repairing
appliances
D) All of the above - ANS- D - All of the above
In what year did the Montreal Protocol take place? - ANS- 1989
, What is generated when ozone reacts with a chlorine ion? - ANS- Oxygen
Despite the fact that R-22 is considered non-toxic, it:
A) Can cause asphyxia
B) is a Class I refrigerant
C) Is lighter than air
D) Can be detected by its color - ANS- A - Can cause asphyxia
When using a system-dependent recovery system on a compressor-operated appliance,
the technician should:
A) Never allow the refrigerant to go to the high side of the system
B) Install access fitting on both high and low-pressure sides of the system
C) Run the compressor and recover from the high side of the system only
D) Run the compressor and recover from the low side of the system only - ANS- C - Run
the compressor and recover from the high side of the system only
What standard must reclaimed refrigerant meet before it may be resold, according to EPA
regulations? - ANS- ARI 700
True or False: All refrigerant oils are hydroscopic. - ANS- True
Which of the following refrigerants is only used in disposable cylinders?
A) Recovery refrigerant
B) Either virgin or recovery refrigerant
C) Virgin refrigerant - ANS- C - Virgin refrigerant
Never pressurize a system with compressed air or oxygen because:
A) Oxygen and compressed air do not mix with refrigerants
B) When mixed with compressor oil or some refrigerants, it could explode
C) Leaking oxygen or compressed air is more difficult to detect than nitrogen
D) The pressure produced by either oxygen or compressed air are not as good as
nitrogen pressures - ANS- B - When mixed with compressor oil or some refrigerants, it
could explode
After 1995, the only source of CFC refrigerants for current refrigeration appliances in the
US was from:
A) Third-world chemical companies
B) Recovery and recycling
C) Solvent conversion - ANS- B - Recovery and recycling
