# Shared Flashcard Set

## Details

HVACR1
Stationary Engineer Training
27
Mechanical Engineering
Not Applicable
05/19/2013

Term
 Aneroid barometer
Definition
 An instrument used to measure atmospheric pressure.
Term
 Atmospheric Pressure
Definition
 The earth exerts a weight or pressure of 14.696 psi at sea level.
Term
 Bourdon tube
Definition
 C-shaped tube manufactured of tin metal and closed on one end; when pressure is increased inside, it tends to straighten.
Term
 BTU(British Thermal Unit)
Definition
 The amount of heat required to raise one pound of water 1 degree fahrenheit.
Term
 Compound Gauge
Definition
 A gauge used to measure the pressure above and below the atmosphere's standard pressure.
Term
 Conduction
Definition
 Heat transfer from one molecule to another within a substance or from one substance to another.
Term
 Convection
Definition
 Heat transfer from one place to another using a fluid.
Term
Definition
 Heat that passes through air, heating solid objects that in turn heat the surrounding area
Term
 Heat
Definition
 Energy in the form of molecules in motion.
Term
 Heat flow
Definition
 Travels from hot to cold.
Term
 Latent heat
Definition
 Heat energy absorbed or rejected when a substance is changing state and there is no change in temperature.
Term
 Sensible heat
Definition
 Heat that causes a change in temperature.
Term
 Specific heat
Definition
 The amount of heat required to raise the temperature of one pound of a substance one degree fahrenheit.
Term
 Pressure
Definition
 Force per unit of area
Term
 Temperature
Definition
 A description of the level of heat.
Term
 Boyle's law
Definition
 The volume of a gas varies inversely with the absolute pressure, provided the temperature remains constant.
Term
 Conversion of energy
Definition
 Energy is neither created nor destroyed but can be converted from one form to another.
Term
 Density
Definition
 The weight per unit volume of a substance
Term
 Energy
Definition
 The capacity for doing work
Term
 Horsepower
Definition
 The equivalent of lifting 33,000 lb to a height of 1 ft in 1 min, or some combination totaling the same.
Term
 Mass
Definition
 Matter held together to the extent that it is considered one body
Term
 Matter
Definition
 Takes up space, has mass, and can be in the form of a solid, a liquid, or a gas.
Term
 Power
Definition
 The rate at which work is done.
Term
 Specific gravity
Definition
 The term used to compare the density of various substances.
Term
 Specific volume
Definition
 The amount of space a pound of vapor or gas will occupy.
Term
 Watt
Definition
 Measurement of electrical power.
Term
 Work
Definition
 The amount of force necessary to move an object; calculated as Force x Distance.
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