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- 1. Multiple Choice
HCFC refrigerants contain which of the following?
Helium, carbon, fluorine & chlorine
Hydrogen, chlorine, ferrite & carbon
Hydrogen, chlorine, fluorine & carbon
Hydrogen, chlorine, fluorine & calcium
- 2. Multiple Choice
HFC refrigerants contain which of the following?
Chlorine, fluorine & carbon
Chlorine, fluorine & hydrogen
Hydrogen, chlorine & carbon
Hydrogen, fluorine & carbon
- 3. Multiple Choice
Which of the following is a requirement for all CFC, HCFC, and HFC refrigerant recovery devices?
They must be portable
They must contain a heavy-duty shield
They must have a 20,000 btu/hr rating
They must meet EPA standards
- 4. Multiple Choice
Why are HFO refrigerants less flammable than hydrocarbon refrigerants?
They contain chlorine.
They contain bromine.
They contain fluorine.
They contain carbon.
- 5. Multiple Choice
According to the ASHRAE refrigerant safety classification standard, which of the following designations would be the safest?
A-1
A-3
B-1
B-3
- 6. Multiple Choice
An example of a CFC refrigerant is:
R-134a
R-123
R-22
R-12
- 7. Multiple Choice
How do the global warming potentials of isobutane (R-600a), propane (R-290), and R-441A compare to the GWPs of HFC-134a, R-404A, and R-410A?
They are significantly higher
They are significantly lower
They are approximately equal
They are just slightly higher
- 8. Multiple Choice
How does the global warming potential of R-410A compare to carbon dioxide?
It is lower.
They are equal.
It is hundreds of times greater.
It is thousands of times greater.
- 9. Multiple Choice
What characteristic of HFC refrigerants make them damaging to the environment?
They are toxic to plants and animals at low doses.
They contain chlorine which damages the ozone layer.
They have a high Ozone Depletion Potential (ODP).
They can have very high global warming potentials.
- 10. Multiple Choice
Which of the following is a "high-pressure refrigerant" under EPA's section 608 regulations?
R-410A
R-113
R-123
R-11
- 11. Multiple Choice
Which of the following is a "low-pressure refrigerant" under EPA's refrigerant recycling regulations?
R-134a
R-123
R-22
R-500
- 12. Multiple Choice
Which of the following is an HFC refrigerant?
R-134a
R-115
R-22
R-11
- 13. Multiple Choice
Which of the following refrigerants contains chlorine?
R-22
R-134a
R-410A
R-1234yf
- 14. Multiple Choice
Which of the following refrigerants damages stratospheric ozone?
HFOs
HFCs
HCFCs
Ammonia
- 15. Multiple Choice
Which of the following refrigerants has the lowest global warming potential?
R-134a
R-407C
R-410A
R-600a
- 16. Multiple Choice
Which of the following refrigerants has the lowest ozone depletion potential?
R-22
R-123
R-410A
R-502
- 17. Multiple Choice
Which of the following refrigerants have an ozone depletion potential of more than zero?
R-600a and R-441A
R-134a and R-410A
R-123 and R-22
R-290 and R-404A
- 18. Multiple Choice
Which of the following refrigerants is an HFO?
R-1234yf
R-123
R-134a
All three are HFOs
- 19. Multiple Choice
Which refrigerant depletes the ozone layer?
R-717
R-744
R-22
R-32
- 20. Multiple Choice
Which refrigerant does not contain chlorine?
R-134a
R-12
R-22
R-124
- 21. Multiple Choice
Which type of refrigerant has the highest ozone depletion potential (ODP)?
HCFCs
HFCs
CFCs
HFOs
- 22. Multiple Choice
Which type of refrigerant is the most harmful to stratospheric ozone?
CFCs
HCFCs
HFCs
HFOs
- 23. Multiple Choice
Which type of refrigerant typically has the lowest global warming potential?
HCFCs
HFOs
HFCs
All are equal
- 24. Multiple Choice
Why are some hydrofluoroolefins {HFOs) classified as A2L?
They have toxicity characteristics.
They are less flammable than hydrocarbon refrigerants, but most are still mildly flammable.
They are prohibited for use in the U.S.
They have high ozone depleting potentials, and low global warming potentials.
- 25. Multiple Choice
Why are some hydrofluorooletin (HFO) refrigerants classified as "A2L"?
They are no different than HFCs.
They are less flammable than hydrocarbon refrigerants, but most are still mildly flammable.
They are prohibited for use in the U.S.
They have ozone depleting potentials, and have low global warming potentials.
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