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Competency and Task List

Residential Air Conditioning


should have

knowledge of




and be able to


proficiency in:

The three states of matter

The laws of Thermodynamics

Heat transfer Convection, Conduction, and Radiation

Atmospheric pressure and the effect of altitude

Absolute and gauge pressures


Refrigerant charging methods

Refrigerant piping

Soldering and brazing

Refrigerant leak detection and types of leak detectors

Recovery and recycling processes

Defining enthalpy and entropy

Change of state between liquids, vapor, and solids

Describing and defining the following; conduction, convection and radiant heat transfer

Describing, defining, and converting the following temperature measurements; Fahrenheit,

Celsius, Rankine, and Kelvin

Condensation of a vapor, and its effect on heat

Vaporization of a liquid, and its effect on heat

Describing the thermodynamics of refrigerants

Describing and defining the following; BTU, latent heat, sensible heat

Describing and defining the following; subcooled liquid, superheated vapor

Describing the state of refrigerant, and explain what occurs in each major component during

normal operation

Using saturation tables

Identifying and defining the following types of blends; Binary, Ternary, Azeotropic, and Near


Identifying and defining; CFC’s, HCFC’s, HFC’s, HFO's & HC's

Describing temperature glide

Describing fractionation and its causes

Describing and defining the following; wet bulb temperature, dry bulb temperature, and dew


Measuring wet and dry-bulb temperatures

Defining wet bulb depression

Describing the principles of dehumidification and humidification