Barometer. instrument used for measuring atmospheric pressure. Boiler. a closed vessel in which a liquid is heated or vaporized. Boiling point. the temperature at which the vapor pressure of a liquid equals the absolute external pressure at the liquid vapor interface. Calorimeter. device for measuring quality of steam or other vapor. Coil. a cooling/heating element made of pipe or tubing. Condenser. a vessel or arrangement of pipe or tubing in which vapor is liquified by removal of heat. Convection. transfer of heat by movement of fluid. Cold pockets. draughts/drafts in air condition. Duct. tube or channel through which air is conveyed or moved. Damper. a device used to vary the volume of air passing through an air outlet, inlet, or duct. Desicant. any absorbent/absorber, liquid or solid that will remove water vapor from a material. Engine. device for transforming fuel or heat energy into mechanical energy. Generator. basic part of absortion systems; provided with means of heating used to drive refrigerant out of solution. Filter. a device to remove solid material from a fluid. Heat. the form of energy that is transformed by virtue of a temperature difference. Horse power. unit of a power in foot-pound-second system, work done at the rate of 550 feet pound per second or 33,000 feet pound per minute. Hooper. an inverted funnel leading into a ventilating flue. Humidity. water vapor within a given space. Induction. the entrainment of room air by the jet action of a primary air stream discharging from an air outlet. Appliance. a utilization equipment, generally industrial, built-in, standard form and size, installed as a unit to perform one or more function. (such as washing, cooking, mixing, etceteras). Askarel. a synthetic non-flammable insulating liquid, which when decomposed by electric arc, evolves only non-flammable gaseous mixture. Branch circuit. is that portion of a wiring system extending beyond the final overcurrent device protecting the circuit. Types: 1. Appliance. only for appliances. 2. General purpose. for appliances and lights. 3. Individual. for one equipment only. Building. a solitary structure that stands alone from other structures divided by open space or by fire walls. Circuit breaker. a device to open and close a circuit by non-automatic means, and to open the circuit automatically or a predetermined overload of current, without injury to itself when properly applied to its rating. Concealed. rendered in accessible by the structure or finish of the building wires in concealed raceways are considered concealed even though they may become accessible by withdrawing them. Connector, pressure. (solderless) a pressure wire connector is a device which establishes the connection between 2 or more conductors or between 1 or more conductors and a terminal by means of mechanical pressure and without the use of solder.
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- Fall '16