HVAC Refrigeration Final Practice Exam with All Correct
& 100% Verified Answers| Updated to Pass
Temperature ✔Correct Answer-Levels of heat, the speed of molecules are traveling
British thermal unit ✔Correct Answer-Amount of heat To raise the temperature of 1 lbs of water
1 degree F
Heat flow ✔Correct Answer-Transfer from hot to cold
Conduction of heat ✔Correct Answer-Heat transfer from one molecule to another within a
substance or both substances are in contact with touching
Convection of heat ✔Correct Answer-Heat transfer from one place to another place using water,
air or steam
Radiant heat ✔Correct Answer-Heat that passes through the air , not heating the air but heating
solid objects which in turns will heat the surrounding area
Sensible heat ✔Correct Answer-it changes the temperature of a substance without a change in its
state
Latent heat ✔Correct Answer-(Hidden heat) heat causing a change of state,liquid to vapor/vapor
to liquid without a change in temperature
Specific heat ✔Correct Answer-the amount of heat needed to raise the temperature of 1 gram of
a substance by 1 degree Celsius
Barometer ✔Correct Answer-A device used to measure atmospheric pressure. 2 types , one
mercury known as a Mercury barometer
Superheat ✔Correct Answer-temperature above its saturation point(boiling point)
Subcooling ✔Correct Answer-temperature below its saturation point(boiling point)
The refrigerant gives up heat when
A.It condenses
B.It evaporates
C.It compresses
D.It vaporizes ✔Correct Answer-A. It condenses
The State of the refrigerant in the suction line should be ✔Correct Answer-low pressure/low
temperature vapor
The state of refrigerant entering the condenser is ✔Correct Answer-high pressure/ high
superheated vapor
Zero PSIA(pounds per square inch absolute) ✔Correct Answer-pounds per square inch absolute
the absolute scale at zero would be no pressure at all
& 100% Verified Answers| Updated to Pass
Temperature ✔Correct Answer-Levels of heat, the speed of molecules are traveling
British thermal unit ✔Correct Answer-Amount of heat To raise the temperature of 1 lbs of water
1 degree F
Heat flow ✔Correct Answer-Transfer from hot to cold
Conduction of heat ✔Correct Answer-Heat transfer from one molecule to another within a
substance or both substances are in contact with touching
Convection of heat ✔Correct Answer-Heat transfer from one place to another place using water,
air or steam
Radiant heat ✔Correct Answer-Heat that passes through the air , not heating the air but heating
solid objects which in turns will heat the surrounding area
Sensible heat ✔Correct Answer-it changes the temperature of a substance without a change in its
state
Latent heat ✔Correct Answer-(Hidden heat) heat causing a change of state,liquid to vapor/vapor
to liquid without a change in temperature
Specific heat ✔Correct Answer-the amount of heat needed to raise the temperature of 1 gram of
a substance by 1 degree Celsius
Barometer ✔Correct Answer-A device used to measure atmospheric pressure. 2 types , one
mercury known as a Mercury barometer
Superheat ✔Correct Answer-temperature above its saturation point(boiling point)
Subcooling ✔Correct Answer-temperature below its saturation point(boiling point)
The refrigerant gives up heat when
A.It condenses
B.It evaporates
C.It compresses
D.It vaporizes ✔Correct Answer-A. It condenses
The State of the refrigerant in the suction line should be ✔Correct Answer-low pressure/low
temperature vapor
The state of refrigerant entering the condenser is ✔Correct Answer-high pressure/ high
superheated vapor
Zero PSIA(pounds per square inch absolute) ✔Correct Answer-pounds per square inch absolute
the absolute scale at zero would be no pressure at all
