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