EPA Core Questions Part 2 Assessment Exam with
Answers 100% Accuracy
1. What effects can ozone depletion have on the environment?
A) Reduced crop yields
B) Reduced marine life
C) Increased ground-level ozone
D) All of the above - Correct Answer D) All of the above
2. Non-Azeotropic refrigerants leak from a system:
A) Faster than other refrigerants
B) In uneven amounts due to different vapor pressures
C) Slower than other refrigerants
D) Only if the joint fails completely - Correct Answer B) In uneven amounts
due to different vapor pressures
3. An example of an HCFC refrigerant is:
A) R-410A
B) R-22
C) R-114
D) R-717 - Correct Answer B) R-22
4. Which chemicals are controlled by the Montreal Protocol?
A) Chlorofluorocarbons
B) Hydrochlorofluorocarbons
C) Halons
D) All of the above - Correct Answer D) All of the above
5. Systems charged with R-134a should be leak checked with:
A) CFCs
B) HCFCs
C) Compressed dry air
D) Pressurized nitrogen - Correct Answer D) Pressurized nitrogen
6. When evacuating a system, the hoses should be:
A) Orange in color for safety reasons
B) As long as possible
, C) Smaller than vacuum pump inlet connection
D) Equal to or larger than vacuum pump inlet connection - Correct Answer
D) Equal to or larger than vacuum pump inlet connection
7. It has been illegal to vent substitutes for CFC and HCFC refrigerants since:
A) June 1, 1992
B) July 15, 1993
C) November 1993
D) November 1995 - Correct Answer D) November 1995
8. Never use oxygen or compressed air to pressurize a system because:
A) When mixed with compressor oil or some refrigerants, it could explode
B) Leaking oxygen or compressed air are more difficult to detect than
nitrogen
C) The pressures produced by either oxygen or compressed air are not as
good as nitrogen pressures
D) Oxygen and compressed air do not mix with refrigerants - Correct
Answer A) When mixed with compressor oil or some refrigerants, it could
explode
9. Refrigerant cylinders should always be:
A) Free of rust and damage
B) Color coded to indicate the contents
C) Secure
D) All of the above - Correct Answer D) All of the above
10. Even though R-22 is considered non-toxic, it:
A) Is lighter than air
B) Can cause asphyxia
C) Is a Class I refrigerant
D) Can be detected by its color - Correct Answer B) Can cause asphyxia
11. A system is dehydrated to:
A) Remove oil and oil vapor
B) Remove water and water vapor
C) Remove refrigerant and refrigerant vapor
D) None of the above - Correct Answer B) Remove water and water vapor
12. According to the EPA, of the refrigerants listed below, which types of refrigerants
will not contribute to Global Warming?
Answers 100% Accuracy
1. What effects can ozone depletion have on the environment?
A) Reduced crop yields
B) Reduced marine life
C) Increased ground-level ozone
D) All of the above - Correct Answer D) All of the above
2. Non-Azeotropic refrigerants leak from a system:
A) Faster than other refrigerants
B) In uneven amounts due to different vapor pressures
C) Slower than other refrigerants
D) Only if the joint fails completely - Correct Answer B) In uneven amounts
due to different vapor pressures
3. An example of an HCFC refrigerant is:
A) R-410A
B) R-22
C) R-114
D) R-717 - Correct Answer B) R-22
4. Which chemicals are controlled by the Montreal Protocol?
A) Chlorofluorocarbons
B) Hydrochlorofluorocarbons
C) Halons
D) All of the above - Correct Answer D) All of the above
5. Systems charged with R-134a should be leak checked with:
A) CFCs
B) HCFCs
C) Compressed dry air
D) Pressurized nitrogen - Correct Answer D) Pressurized nitrogen
6. When evacuating a system, the hoses should be:
A) Orange in color for safety reasons
B) As long as possible
, C) Smaller than vacuum pump inlet connection
D) Equal to or larger than vacuum pump inlet connection - Correct Answer
D) Equal to or larger than vacuum pump inlet connection
7. It has been illegal to vent substitutes for CFC and HCFC refrigerants since:
A) June 1, 1992
B) July 15, 1993
C) November 1993
D) November 1995 - Correct Answer D) November 1995
8. Never use oxygen or compressed air to pressurize a system because:
A) When mixed with compressor oil or some refrigerants, it could explode
B) Leaking oxygen or compressed air are more difficult to detect than
nitrogen
C) The pressures produced by either oxygen or compressed air are not as
good as nitrogen pressures
D) Oxygen and compressed air do not mix with refrigerants - Correct
Answer A) When mixed with compressor oil or some refrigerants, it could
explode
9. Refrigerant cylinders should always be:
A) Free of rust and damage
B) Color coded to indicate the contents
C) Secure
D) All of the above - Correct Answer D) All of the above
10. Even though R-22 is considered non-toxic, it:
A) Is lighter than air
B) Can cause asphyxia
C) Is a Class I refrigerant
D) Can be detected by its color - Correct Answer B) Can cause asphyxia
11. A system is dehydrated to:
A) Remove oil and oil vapor
B) Remove water and water vapor
C) Remove refrigerant and refrigerant vapor
D) None of the above - Correct Answer B) Remove water and water vapor
12. According to the EPA, of the refrigerants listed below, which types of refrigerants
will not contribute to Global Warming?
