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21 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Chemicals used for refrigerants can be be broken down into two groups |
Organic and inorganic |
Refrigerants can only be liquid and solid |
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Hydrocarbons include propane ethane and_________ |
Isobutane |
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Hcfc-22 is almost identical to_____ |
Hfc-12 |
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Future refrigerants will be limited to ______ |
HFC-12 |
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Recovered refrigerants must be filtered and______ before being used to recharge the unit from which it is removed |
Dried |
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R-12 refrigerant boils at _____ degrees F |
-21.6 |
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Class 1 refrigerants used |
Standard compression type of refrigerants |
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Class 2 refrigerants used |
Immediate cooling agents between class 1 & 3 types |
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Class 3 refrigerants used |
Standard absorption type of refrigerating systems |
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Temperature glide is the difference between the few point and the bubble points of the refrigerant at any given_____ |
Point |
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Temperature glide is the difference between the few point and the bubble points of the refrigerant at any given_____ |
Point |
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The reliability of a refrigeration system is largely dependent on the hardware design installation and_____ |
Application |
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Which refrigerant is used most frequently in a large industrial plants |
Ammonia |
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The oil separator collects____oil that escapes with the compressor-discharge gas |
Lubricanting |
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The blended refrigerant r-134 is a long-term hfc alternative with similar properties to: |
R-21 |
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What is another refrigerant other than 134a that can be substantiated for R-12 |
R-401A |
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When working with refrigerants the use of modular solid-state electronics and built-in diagnostic testing reduces the amount of ____ analysis that must be performed In order to isolate malfunctions in the latest equipment |
Trouble |
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What does toxicity mean |
Poisonous |
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Where will technicians get their Freon after 2020? |
Recyclers |
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What kind of toxic gas is produced when Freon is heated? |
Propane |
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Which refrigerant is a blend of r-22 r-125 r-290? |
R-402A |
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