CFESA Refrigeration Certification
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Heat flows in what direction? - CORRECT ANSWER - From warm to cool
Describe heat transfer by radiation - CORRECT ANSWER - Heat transferred through the
air that does not transfer heat until it hits an object
Describe heat transfer by convection - CORRECT ANSWER - Heat transfers by
movement through water, forced air
Describe heat transfer by conduction - CORRECT ANSWER - Heat transferred by
physical contact
How fast will heat transfer from one object to another if the temperature of both is the same -
CORRECT ANSWER - It will not transfer if two objects are the same temperature
How fast will heat transfer from one object to another if the temperature difference between the
two is 100* - CORRECT ANSWER - Quickly
What is a BTU? - CORRECT ANSWER - The amount of heat required to raise 1 pound of
water 1°F
How many BTU are required to raise 5 pounds of water from 50 to 90 - CORRECT
ANSWER - 200 BTU
What is sensible heat? - CORRECT ANSWER - Heat that can be measured with with the
thermometer
,What is Latent heat? - CORRECT ANSWER - Heat transferred without a change in
temperature
What is Latent heat of vaporization for water? - CORRECT ANSWER - 970 BTU/lb
What is the Latent heat of fusion for water? - CORRECT ANSWER - 144 BTU/lb
What is specific heat? - CORRECT ANSWER - Amount of BTU required to raise 1 pound
of substance 1°F
What is the definition of saturation temperature? - CORRECT ANSWER - Temperature at
which a substance can exist as both liquid and vapor
What is superheat? - CORRECT ANSWER - Sensible heat added to a vapor that raises the
temperature of the vapor
What is sub-cooling? - CORRECT ANSWER - Sensible heat removed from a liquid that
lowers the temperature of the liquid
1 ton of refrigerant is equal to how many BTU per hour - CORRECT ANSWER - 12,000
BTU/hourp
What does the pressure temperature relationship state? - CORRECT ANSWER - A law
that states for every temperature of certain substances, there will be only one corresponding
pressure as long as there are at least one drop of liquid left in the part of the system
What are two most important characteristics of a refrigerant - CORRECT ANSWER - It
must adhere to a pressure temperature relationship and it must have a very low boiling point
temperature
, What happens to the pressure in a closed container of a refrigerant as the ambient temperature
increases - CORRECT ANSWER - The internal pressure will also increase according to
the pressure temperature relationship
What happens to the pressure in a closed container of refrigerant as the ambient temperature
decrease - CORRECT ANSWER - The internal pressure will also decrease according to
the pressure temperature relationship
What happens to the temperature of the refrigerant in a closed container as the pressure increase?
- CORRECT ANSWER - The temperature of the refrigerant will also increase according
to the pressure temperature relationship
What is the function of the refrigeration cycle? - CORRECT ANSWER - Remove heat in
the area to be cooled and expel the same heat outside of the area to be cooled
How is the pressure changed between the condenser and evaporator? - CORRECT
ANSWER - Metering device that reduces the volume of refrigerant flow, thereby reducing
the pressure at the evaporator
How is pressure changed between the evaporator and condenser? - CORRECT
ANSWER - The low pressure in evaporator enters the compressor and is compressed to
create high-pressure refrigerant vapor
How is the refrigerant temperature lowered from the condenser to the evaporator coil? -
CORRECT ANSWER - Refrigerant temperature is raised by raising the pressure on the
condenser side of the circuit
How is refrigerant temperature raised between the evaporate and the condenser - CORRECT
ANSWER - The refrigerant temperature is raised by raising the pressure on the condenser
side of the circuit
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Heat flows in what direction? - CORRECT ANSWER - From warm to cool
Describe heat transfer by radiation - CORRECT ANSWER - Heat transferred through the
air that does not transfer heat until it hits an object
Describe heat transfer by convection - CORRECT ANSWER - Heat transfers by
movement through water, forced air
Describe heat transfer by conduction - CORRECT ANSWER - Heat transferred by
physical contact
How fast will heat transfer from one object to another if the temperature of both is the same -
CORRECT ANSWER - It will not transfer if two objects are the same temperature
How fast will heat transfer from one object to another if the temperature difference between the
two is 100* - CORRECT ANSWER - Quickly
What is a BTU? - CORRECT ANSWER - The amount of heat required to raise 1 pound of
water 1°F
How many BTU are required to raise 5 pounds of water from 50 to 90 - CORRECT
ANSWER - 200 BTU
What is sensible heat? - CORRECT ANSWER - Heat that can be measured with with the
thermometer
,What is Latent heat? - CORRECT ANSWER - Heat transferred without a change in
temperature
What is Latent heat of vaporization for water? - CORRECT ANSWER - 970 BTU/lb
What is the Latent heat of fusion for water? - CORRECT ANSWER - 144 BTU/lb
What is specific heat? - CORRECT ANSWER - Amount of BTU required to raise 1 pound
of substance 1°F
What is the definition of saturation temperature? - CORRECT ANSWER - Temperature at
which a substance can exist as both liquid and vapor
What is superheat? - CORRECT ANSWER - Sensible heat added to a vapor that raises the
temperature of the vapor
What is sub-cooling? - CORRECT ANSWER - Sensible heat removed from a liquid that
lowers the temperature of the liquid
1 ton of refrigerant is equal to how many BTU per hour - CORRECT ANSWER - 12,000
BTU/hourp
What does the pressure temperature relationship state? - CORRECT ANSWER - A law
that states for every temperature of certain substances, there will be only one corresponding
pressure as long as there are at least one drop of liquid left in the part of the system
What are two most important characteristics of a refrigerant - CORRECT ANSWER - It
must adhere to a pressure temperature relationship and it must have a very low boiling point
temperature
, What happens to the pressure in a closed container of a refrigerant as the ambient temperature
increases - CORRECT ANSWER - The internal pressure will also increase according to
the pressure temperature relationship
What happens to the pressure in a closed container of refrigerant as the ambient temperature
decrease - CORRECT ANSWER - The internal pressure will also decrease according to
the pressure temperature relationship
What happens to the temperature of the refrigerant in a closed container as the pressure increase?
- CORRECT ANSWER - The temperature of the refrigerant will also increase according
to the pressure temperature relationship
What is the function of the refrigeration cycle? - CORRECT ANSWER - Remove heat in
the area to be cooled and expel the same heat outside of the area to be cooled
How is the pressure changed between the condenser and evaporator? - CORRECT
ANSWER - Metering device that reduces the volume of refrigerant flow, thereby reducing
the pressure at the evaporator
How is pressure changed between the evaporator and condenser? - CORRECT
ANSWER - The low pressure in evaporator enters the compressor and is compressed to
create high-pressure refrigerant vapor
How is the refrigerant temperature lowered from the condenser to the evaporator coil? -
CORRECT ANSWER - Refrigerant temperature is raised by raising the pressure on the
condenser side of the circuit
How is refrigerant temperature raised between the evaporate and the condenser - CORRECT
ANSWER - The refrigerant temperature is raised by raising the pressure on the condenser
side of the circuit
