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HVAC 1000-01 quiz 2
Definition
| Question | Answer |
|---|---|
| Clearance Volume | The volume at the top of the stroke in a reciprocating compressor cylinder between the top of the piston and the valve plate |
| Back Pressure | The pressure on the low-pressure side of a refrigeration system (also known as suction pressure) |
| Gasket | A thin piece of flexible material used between two metal plates to prevent leakage |
| Discus Valve | A reciprocating compressor valve design with a low clearance volume and larger bore |
| External Drive | An external type of compressor motor drive, as opposed to a hermetic compressor |
| Cooling Tower | The final device in many water-cooled systems, which rejects heat from the system into the atmosphere by evaporation of water |
| Compressor | A vapor pump that pumps vapor (refrigerant or air) from one pressure level to a higher pressure level |
| Accumulator | A storage tank located in the suction line of a compressor. It allows small amounts of liquid refrigerant to boil away before entering the compressor. |
| Evaporator | The component in a refrigeration system that absorbs heat into the system and evaporates the liquid refrigerant |
| End Bell | The end structure of an electric motor that normally contains the bearings and lubrication system |
| Liquid Line | A term applied in the industry to refer to the tubing or piping from the condenser to the expansion device |
| Condensing Unit | A complete unit that includes the compressor and the condensing coil |
| Charge | The quantity of refrigerant in a system. |
| Crankshaft Seal | Same as the compressor shaft seal. |
| Flooding | The term applied to refrigeration system when the liquid refrigerant reaches the compressor |
| Drier | A device used in a refrigerant line to remove moisture |
| High Side | A term used to indicate the high-pressure or condensing side of the refrigeration system |
| Condenser | The component in a refrigeration system that transfers heat from the system by condensing refrigerant |
| Desiccant | Substance in a refrigeration system drier that collects moisture |
| Centrifugal Compressor | A compressor used for large refrigeration systems that uses centrifugal force to accomplish compression. It is not positive displacement, but it is similar to a blower |
| Air Heat Exchanger | A device used to exchange heat between air and another medium at different temperature levels, such as air-to-air, air-to-water, air-to-refrigerant |
| Eccentric | An off-center device that rotates in a circle around a shaft |
| Head | Another term for pressure, usually referring to gas or liquid |
| Gauge Manifold | A tool that may have more than one gauge with valve arrangement to control fluid flow. |
| Contaminant | Any substance in a refrigeration system that is foreign to the system, particularly if it causes damage |
Created by:
toolegit
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