RAC 40 Quiz 4 Review Questions |
Latest Version | 2024/2025 | 100%
Verified
What is the main property of a refrigerant that allows it to change from liquid to gas?
The main property is its low boiling point, which allows it to evaporate and absorb heat at
low temperatures.
What is a com...
RAC 40 Quiz 4 Review Questions |
Latest Version | 2024/2025 | 100%
Verified
What is the main property of a refrigerant that allows it to change from liquid to gas?
✔✔The main property is its low boiling point, which allows it to evaporate and absorb heat at
low temperatures.
What is a common environmental concern associated with certain refrigerants?
✔✔Certain refrigerants contribute to ozone depletion and global warming.
What is the difference between a CFC and an HFC refrigerant?
✔✔CFCs (chlorofluorocarbons) contain chlorine, which depletes the ozone layer, while HFCs
(hydrofluorocarbons) do not contain chlorine and have a lower ozone depletion potential.
What does the term "Ozone Depletion Potential" (ODP) refer to?
✔✔ODP refers to the measure of a substance's ability to degrade the ozone layer compared to
CFC-11, which is assigned an ODP of 1.
1
, Why are HFO refrigerants considered more environmentally friendly?
✔✔HFOs (hydrofluoroolefins) have low global warming potential and do not contribute to
ozone depletion.
What is the significance of the ASHRAE designation for refrigerants?
✔✔The ASHRAE designation provides a standardized way to classify refrigerants based on their
chemical composition and environmental impact.
What does the term "global warming potential" (GWP) indicate for refrigerants?
✔✔GWP indicates how much heat a greenhouse gas traps in the atmosphere over a specific time
period compared to carbon dioxide.
What safety classification is given to refrigerants that are non-toxic and non-flammable?
✔✔Refrigerants classified as "A1" are considered non-toxic and non-flammable according to
ASHRAE standards.
How should refrigerants be handled to prevent environmental contamination?
✔✔Refrigerants should be handled with care, using proper recovery equipment to prevent
release into the atmosphere.
2
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