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HVAC 1000-01 Quiz 3
| Question | Answer |
|---|---|
| Purge | to remove or release fluid from a system |
| Semi-hermetic Compressor | A motor compressor that can be opened or disassembled by removing bolts and flanges. Also known as a serviceable hermetic |
| Forced convection | The movement of fluid by mechanical means |
| Reed Valve | A thin steel plate used as a valve in a compressor |
| Reverse Cycle | The ability to direct the hot gas flow into the indoor or the outdoor coil in a heat pump to control the system for heating or cooling purposes |
| Schraeder valve | A valve similar to the valve on an auto tire that allows refrigerant to be charged or discharged from the system |
| Shell and Coil | A vessel with a coil of tubing inside that is used as a heat exchanger |
| Flash Gas | The term used to described the pressure drop in an expansion device when some of the liquid passing through the valve is changed quickly to a gas and cools the remaining liquid to the corresponding temperature |
| Moisture Indicator | A device for determining moisture |
| Horsepower(hp) | A unit equal to 33000 ft-lb of work per minute |
| Non-condensable Gas | A gas that does not change into a liquid under normal operating conditions |
| Receiver-drier | A component in a refrigeration system for storing and drying refrigerant |
| Remote System | Often called a split system where the condenser is located away from the evaporator and/or other parts of the system |
| King Valve | A service valve at the liquid receiver's outlet in a refrigeration system |
| Bellows | An accordion-live device that expands and contracts when internal pressure changes |
| Heat of Fusion | The heat released when a substance is changing from a liquid to a solid |
| Scroll Compressor | A compressor that uses two scroll-type components, one stationary and one orbiting, to compress vapor |
| Rotary Compressor | A compressor that uses rotary motion to pump fluids. It is a positive displacement pump |
| Compressor Muffler | Device installed in hot gas line to silence discharge surges |
| Liquid Receiver | A container in the refrigeration system where liquid refrigerant is stored |
| Frost Back | A condition of frost on the suction line and even the compressor body |
| Natural Convection | The natural movement of a gas or fluid caused by differences in temperature |
| Pressure Switch | A switch operated by a change in pressure |
| Diaphragm | A thin flexible material (metal, rubber, or plastic) that separates two pressure differences |
Created by:
toolegit
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