Nccer Hvac Introduction To Cooling Study Guide Graded A+

Compound {Ans: As related to refrigerants, a refrigerant formed by a union of two or more refrigerants to form a new refrigerant.}Latent heat {Ans: The heat energy absorbed or rejected when a substance is in the process of changing state (solid to liquid, liquid to gas, or the reverse of either change}Thermocouple {Ans: A device made of two different metals that generates electricity when there is a difference in temperature from one end to the other}Mixture {Ans: As related to refrigerants, a combination of two or more substances that are not chemically combined. The combined refrigerants remain separate and do not form a unique refrigerant.}Refrigerant Floodback {Ans: A significant amount of liquid refrigerant that returns to the compressor through the suction line. __________ can have a number of causes, such as a metering device that overfeeds refrigerant or a failed evaporator fan motor.}Hygroscopic {Ans: Describes a material that readily, and sometimes aggressively, absorbs water from the atmosphere or other adjacent material.}Superheat {Ans: The additional, increase in temperature of a refrigerant vapor after it has completed the change of state from a liquid to a vapor. Only after the phase change is complete can