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25 Cards in this Set
- Front
- Back
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212 degrees
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The Fahrenheit scale is based on boiling water having a sea level temperature of:
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10 Btus
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Five pounds of water heated to raise the temperature 2 degrees requires:
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Can be sensed by a thermometer
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Sensible heat is heat that:
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After all liquid has been changed to a vapor
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Superheat is added:
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Conduction
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The transfer of heat from one object to another by direct contact is called:
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12,000 Btus per hour
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A ton of refrigeration is equal to:
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14.7 psi
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Zero guage pressure corresponds on the absolute scale to:
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The pressure is decreased
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The boiling temperature of a liquid will be lower as:
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From a higher pressure to a lower pressure
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A gas or liquid allways flows:
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Condensor
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In a refrigeration system, the high-pressure, high temperature vapor is converted into a high-pressure, high-temperature liquid by:
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Evaporator
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In a refrigeration system the low-pressure, low-temperature liquid is converted into a low-pressure, low temperature vapor by the:
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Compressor
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In a refrigeration system, the low-pressure, low-temperature vapor is converted into a high-pressure, high-temperature vapor by the:
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Suction side (input) of the compressor
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The low side of the refrigeration system includes the:
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High side of the system
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Head pressure refers to the pressure in the:
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boiling point is 72 degrees
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If a gas is superheated 15 degrees to a temperature of 87 degrees F, we can determine that it's:
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The fluorocarbon always has fluorine in it but not all halocarbons do
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The difference between a halocarbon and a fluorocarbon refrigerant is that:
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HFC's
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The fluorocarbon refrigerants considered least harmful to the environment are the:
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Gray with a yellow top
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What is the color code for refrigerant recovery cylinders:
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Reciprocating
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A compressor with a piston that travels back and forth in a cylinder is a __________ compressor.
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Remove heat from the refrigerant
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The main purpose of a condensor is to:
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Add heat to the refrigerant
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The main purpose of an evaporator is to:
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Superheat
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A TXV regulates the flow of refrigerant to the evaporator in order to maintain a constant:
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Receiver, sight glass / moisture indicator, filter dryer
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Components (accessories) most often found in the refrigeration system liquid line are:
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Regulate and / or protect the cycle
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A secondary control is used to:
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Pitch in the direction of flow
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Horizontal piping runs used in refrigeration systems should:
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