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21 Cards in this Set
- Front
- Back
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What are 4 main components required for a basic cooling system? |
1) compressor 2) evaporator 3) condenser 4) liquid metering device |
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As the pressure of a substance increases, the boiling point of that same substance? |
Increases |
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If which refrigerant is worst for the ozone layer? |
CFC |
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Is one ton of cooling is equal to? |
12,000 BTUH |
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Which component absorbs heat from where it is not desired? |
Evaporator |
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Which component changes liquid to a gas? |
Evaporator |
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The condenser is considered to be under what type of pressure relative to the system? |
High pressure |
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Which metering device automatically regulates the amount of refrigerant flowing into the system? |
Thermal expansion valve |
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Recover in refrigeration means? |
Removal of refrigerants into a approved container |
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super heat means? |
Vapor heated to a temperature above its saturation point |
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If what is the maximum volume capacity for any recovery cylinder under normal temperatures? |
80% |
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What could happen to the refrigerant if moisture is in the system? |
Possible acid compound |
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What is the latent heat of fusion? Solid to liquid |
144 BTU |
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If a capillary tube evaporator coil is purchased can its size be increased or decreased? |
No |
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What's important about the type of copper used in refrigeration? |
Needs to be charged with nitrogen, cleaned and dried |
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What are refrigerant systems split into? |
High side and the low side |
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What is the location of a TXV valve? |
Liquid line near evaporator coil. |
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What is the location of the temperature sensing bulb of a TXV valve? |
Refrigerant flow out of the evaporator coil. |
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What is the location of the fixed office in the refrigeration system? |
Refrigerant flow into the evaporator coil. |
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What is the location of the capillary tube in the refrigeration system? |
Refrigerant flow out of the evaporator coil. |
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What causes a cock to break down in atmosphere ? |
Ultraviolet light |
