CFESA REFRIGERATION CERTIFICATION 7 2026
EXAM REVIEW SOLVED QUESTIONS AND
CORRECT ANSWERS GRADED A+
◉ 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
◉ How is pressure changed between the evaporator and
condenser?.
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?.
,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.
Answer: The refrigerant temperature is raised by raising the
pressure on the condenser side of the circuit
◉ How is heat absorbed in the refrigerated space.
Answer: Heat from the cabinet and food naturally travels to the
colder evaporator coil where it boils off the liquid refrigerant
◉ How is heat expelled outside the refrigerated space.
Answer: The high temperature refrigerant in the condenser is cooled
by the cooler, ambient air, removing the heat from the high
temperature refrigerant vapor
◉ Why is the issue of refrigerant so difficult today?.
Answer: There are so many different refrigerants used today
◉ What is the problem caused by CFC refrigerant.
Answer: They are depleting the ozone layer in the atmosphere
, ◉ Why must refrigerant be recovered.
Answer: It is the law to protect the environment
◉ What are HCFC refrigerants.
Answer: They are interim refrigerant except for our 22 and they
have low ozone depletion potential
◉ What are HFC refrigerants.
Answer: The newer refrigerant with a zero ozone depletion
potential
◉ Which type of refrigerant is preferable?.
Answer: HFC refrigerant because they have no potential deplete the
ozone
◉ Why not just use HFC refrigerant all the time.
Answer: It can be a major job to switch to the new HFC refrigerant
due to the hard task of removing all of the old mineral oil and
replacing it with new polyester oil
◉ What qualities must refrigerants have.
Answer: Pressure temperature relationship low boiling point
nontoxic non-flammable non-explosive
EXAM REVIEW SOLVED QUESTIONS AND
CORRECT ANSWERS GRADED A+
◉ 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
◉ How is pressure changed between the evaporator and
condenser?.
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?.
,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.
Answer: The refrigerant temperature is raised by raising the
pressure on the condenser side of the circuit
◉ How is heat absorbed in the refrigerated space.
Answer: Heat from the cabinet and food naturally travels to the
colder evaporator coil where it boils off the liquid refrigerant
◉ How is heat expelled outside the refrigerated space.
Answer: The high temperature refrigerant in the condenser is cooled
by the cooler, ambient air, removing the heat from the high
temperature refrigerant vapor
◉ Why is the issue of refrigerant so difficult today?.
Answer: There are so many different refrigerants used today
◉ What is the problem caused by CFC refrigerant.
Answer: They are depleting the ozone layer in the atmosphere
, ◉ Why must refrigerant be recovered.
Answer: It is the law to protect the environment
◉ What are HCFC refrigerants.
Answer: They are interim refrigerant except for our 22 and they
have low ozone depletion potential
◉ What are HFC refrigerants.
Answer: The newer refrigerant with a zero ozone depletion
potential
◉ Which type of refrigerant is preferable?.
Answer: HFC refrigerant because they have no potential deplete the
ozone
◉ Why not just use HFC refrigerant all the time.
Answer: It can be a major job to switch to the new HFC refrigerant
due to the hard task of removing all of the old mineral oil and
replacing it with new polyester oil
◉ What qualities must refrigerants have.
Answer: Pressure temperature relationship low boiling point
nontoxic non-flammable non-explosive
