CFESA REFRIGERATION CERTIFICATION 7 2026
CERTIFICATION EVALUATION EXAMS
COMPLETE QUESTIONS AND ANSWERS
◉ Describe heat transfer by radiation.
Answer: Heat transferred through the air that does not transfer heat
until it hits an object
◉ Describe heat transfer by convection.
Answer: Heat transfers by movement through water, forced air
◉ Describe heat transfer by conduction.
Answer: Heat transferred by physical contact
◉ How fast will heat transfer from one object to another if the
temperature of both is the same.
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*.
Answer: Quickly
,◉ What is a BTU?.
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.
Answer: 200 BTU
◉ What is sensible heat?.
Answer: Heat that can be measured with with the thermometer
◉ What is Latent heat?.
Answer: Heat transferred without a change in temperature
◉ What is Latent heat of vaporization for water?.
Answer: 970 BTU/lb
◉ What is the Latent heat of fusion for water?.
Answer: 144 BTU/lb
◉ What is specific heat?.
Answer: Amount of BTU required to raise 1 pound of substance 1°F
,◉ What is the definition of saturation temperature?.
Answer: Temperature at which a substance can exist as both liquid
and vapor
◉ What is superheat?.
Answer: Sensible heat added to a vapor that raises the temperature
of the vapor
◉ What is sub-cooling?.
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.
Answer: 12,000 BTU/hourp
◉ What does the pressure temperature relationship state?.
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.
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.
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.
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?.
Answer: The temperature of the refrigerant will also increase
according to the pressure temperature relationship
◉ What is the function of the refrigeration cycle?.
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?.
Answer: Metering device that reduces the volume of refrigerant flow,
thereby reducing the pressure at the evaporator
CERTIFICATION EVALUATION EXAMS
COMPLETE QUESTIONS AND ANSWERS
◉ Describe heat transfer by radiation.
Answer: Heat transferred through the air that does not transfer heat
until it hits an object
◉ Describe heat transfer by convection.
Answer: Heat transfers by movement through water, forced air
◉ Describe heat transfer by conduction.
Answer: Heat transferred by physical contact
◉ How fast will heat transfer from one object to another if the
temperature of both is the same.
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*.
Answer: Quickly
,◉ What is a BTU?.
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.
Answer: 200 BTU
◉ What is sensible heat?.
Answer: Heat that can be measured with with the thermometer
◉ What is Latent heat?.
Answer: Heat transferred without a change in temperature
◉ What is Latent heat of vaporization for water?.
Answer: 970 BTU/lb
◉ What is the Latent heat of fusion for water?.
Answer: 144 BTU/lb
◉ What is specific heat?.
Answer: Amount of BTU required to raise 1 pound of substance 1°F
,◉ What is the definition of saturation temperature?.
Answer: Temperature at which a substance can exist as both liquid
and vapor
◉ What is superheat?.
Answer: Sensible heat added to a vapor that raises the temperature
of the vapor
◉ What is sub-cooling?.
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.
Answer: 12,000 BTU/hourp
◉ What does the pressure temperature relationship state?.
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.
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.
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.
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?.
Answer: The temperature of the refrigerant will also increase
according to the pressure temperature relationship
◉ What is the function of the refrigeration cycle?.
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?.
Answer: Metering device that reduces the volume of refrigerant flow,
thereby reducing the pressure at the evaporator
