HVAC Refrigeration Final Practice Exam Question and Answers
HVAC Refrigeration Final Practice Exam Question and Answers Temperature Levels of heat, the speed of molecules are traveling British thermal unit Amount of heat To raise the temperature of 1 lbs of water 1 degree F Heat flow Transfer from hot to cold Conduction of heat Heat transfer from one molecule to another within a substance or both substances are in contact with touching Convection of heat Heat transfer from one place to another place using water, air or steam Radiant heat Heat that passes through the air , not heating the air but heating solid objects which in turns will heat the surrounding area Sensible heat it changes the temperature of a substance without a change in its state Latent heat (Hidden heat) heat causing a change of state,liquid to vapor/vapor to liquid without a change in temperature Specific heat the amount of heat needed to raise the temperature of 1 gram of a substance by 1 degree Celsius Barometer A device used to measure atmospheric pressure. 2 types , one mercury known as a Mercury barometer Superheat temperature above its saturation point(boiling point) Subcooling temperature below its saturation point(boiling point)
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