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HVAC BOOK UNIT #6

Horizontales
A mechanical pressure gauge that has a small, single-acting spring return cylinder that acts as a pressure-sensing element.
A measurement of gravity acting on the mass of a substance.
A mechanical pressure gauge with a curved tube made of thin metal that acts as a pressure-sensing element.
The volume that one pound of a gas substance occupies at a particular temperature and pressure condition; expressed in cubic feet per pound (ft3/lb.).
The density of a solid, liquid, or gas based on the density of water.
A positively charged particle in the nucleus of an atom.
A substance that moves heat by changing state from a liquid to a gas when absorbing heat and from a gas to a liquid when rejecting heat.
Any pressure above a perfect vacuum (0 psia).
A unit for quantity of heat that equals 100,000 British thermal units.
The smallest unit of an element that holds the properties of the element.
The amount of energy transferred by a force in (lb.) over a specific distance in (ft).
A pressure measurement above atmospheric pressure that is used to express pressure derived from the operation of a closed system.
A gas law stating that when the pressure on a gas is constant, the volume of the gas is directly proportional to absolute temperature; and when the volume of a gas is constant, the pressure on the gas is directly proportional to absolute temperature.
A unit of power equal to 550 ft-lb/sec or 745.7 W of electricity.
The mass of a substance per unit of volume.
Verticales
The energy of a substance resulting from the internal motion of its molecular structure.
The heat applied to or removed from a substance that results in a change of state.
The amount of matter a substance contains.
A theoretical condition in which a substance has no molecular movement.
A test instrument used to measure atmospheric pressure.
A substance that cannot be broken down into a simpler form of matter.
The heat applied to or removed from a substance that results in a temperature change.
The quantity of heat required to change the temperature of 1 lb of water 1°F.
The scientific study of the behavior of heat.
A gas law stating that the volume of gas is directly proportional to absolute temperature and inversely proportional to pressure.
A method of heat transfer in which invisible heat rays move heat.
The measurement of the intensity of heat.
A method of heat transfer in which heat is moved from one location to another through the circulation of a substance.
The force, in pounds, exerted over a surface divided by the area of the surface.
A method of heat transfer caused by the direct physical contact of substances.
Any substance that has weight and occupies space.
The rate at which work in (ft-lb) is produced per unit of time in (sec).