RETA Industrial Refrigeration Book 1
EXAM 2025 QUESTIONS AND ANSWERS
As defined in Chapter one of this text, the primary purpose of a refrigeration system it to? (pg.
1-3)
A) To freeze food
B) To cool buildings
C) To preserve food
D) To maintain a temperature - ANS D) To maintain a temperature
Operators must keep refrigeration systems operating safely and efficiently. Which of the
following best describes the areas of required knowledge for this to be possible? (pg. 1-4)
A) Basic physical principles, interpretation of information from temperature and pressure
gauges, basic operating principles
B) Basic physical principles, interpretation of information from temperature and pressure
gauges, manufacturer of the equipment
C) Interpretation of information from temperature and pressure gauges, basic operating
principles, company quality control policies and procedures
D) Interpretation of information from temperature and pressure gauges, manufacturer of the
equipment, company quality control policies and procedures - ANS A) Basic physical
principles, interpretation of information from temperature and pressure gauges, basic
operating principles
Mechanical refrigeration is a series of steps that? (pg. 1-2)
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A) Moves heat energy from a space or object to an area where it can do no harm
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, B) Adds cold to a space or object
C) Transforms heat energy into cold energy to reduce the temperature of the area to be cooled
D) Utilizes the cooling effect of compressing a gas to reduce the temperature in a space or
object - ANS A) Moves heat energy from a space or object to an area where it can do no
harm
Heat energy always flows? (pg. 1-23)
A) From a substance with more heat energy [measured in BTUs] to a substance with less heat
energy [ measured in BTUs]
B) Regardless of temperature
C) From an object at a higher temperature to an object at a lower temperature
D) From a liquid to a vapor - ANS C) From an object at a higher temperature to an object at a
lower temperature
Sensible heat? (pg. 1-22)
A) Is measured using a pressure gauge
B) Is always between 32°F and 212°F
C) Is heat energy that causes a change of state but does not cause a change in temperature
D) Is heat energy that causes a change in temperature but does not cause a change of state -
ANS D) Is heat energy that causes a change in temperature but does not cause a change of
state
Latent heat? (pg. 1-22)
A) Is measured using a pressure gauge
B) Can be sensed by using a thermometer
C) Is heat energy that causes a change of state but does not cause a change in temperature
D) Is heat energy that causes a change in temperature but does not cause a change of state -
ANS C) Is heat energy that causes a change of state but does not cause a change in
temperature
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, Which of the answers below is an example of heat transfer by convection? (pg. 1-36)
A) The Sun's rays
B) A rod that is heat on one end resulting in a temperature change at the other end
C) Warm air moving over an object
D) Heat transferred to a pan setting on an electric hot plate - ANS C) Warm air moving over
an object
How does the refrigeration technician/operator know what the conditions are within a
refrigeration system? (pg. 1-4)
A) By using his knowledge of system basic operating principles to evaluate temperature and
pressure readings
B) By observing the alarm annunciator panel, if no alarms are displayed the system is operating
efficiently and correctly
C) By keeping the discharge and suction pressures within specification the operator assures
proper system operationg
D) By observing product temperature, if the product is at temperature the system is operating
properly - ANS A) By using his knowledge of system basic operating principles to evaluate
temperature and pressure readings
How is cooling accomplished by a mechanical refrigeration system? (pg. 1-2)
A) By just pumping ice water through a space
B) By just adding cold air
C) By removing heat energy from an object or area
D) By increasing the molecular vibration of an object - ANS C) By removing heat energy from
an object or area
Which of the following is used to measure the quantity of heat energy? (pg. 1-21)
A) British Thermal Units (BTUs) or Calories
B) Pascals and Kilopascals
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C) Degrees Kelvin
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, D) Degrees Celsius or Fahrenheit - ANS A) British Thermal Units (BTUs) or Calories
Which of the following are used in heat calculations? (pg. 1-40
A) Mass, sensible heat, temperature, specific heat
B) Mass, latent heat, temperature, specific heat
C) Mass, sensible heat, heat of cooling, change of state
D) Mass, latent heat, temperature, heat of refrigeration - ANS B) Mass, latent heat,
temperature, specific heat
Latent heat of vaporization? (pg. 1-22)
A) Is calculated using temperature
B) Is always going to raise the temperature of the liquid it is trying to boil
C) Is the heat energy required to cause a liquid to become a vapor
D) Is the same for all liquids - ANS C) Is the heat energy required to cause a liquid to become
a vapor
Pressure is a measure of? (pg. 1-11)
A) The action seen from the attraction of gravity
B) Weight
C) The relationship of a force being applied over a given area
D) The distance between the top of the piston and the discharge valve of a reciprocating
compressor - ANS C) The relationship of a force being applied over a given area
The relationship between temperature difference and heat flow is? (pg. 1-23)
A) There is no relationship between temperature and heat flow
B) The greater the temperature difference, the slower heat flows
C) The greater the temperature difference, the more rapid heat flows
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Page
@COPYRIGHT BRAINBARTER 2025/2026
EXAM 2025 QUESTIONS AND ANSWERS
As defined in Chapter one of this text, the primary purpose of a refrigeration system it to? (pg.
1-3)
A) To freeze food
B) To cool buildings
C) To preserve food
D) To maintain a temperature - ANS D) To maintain a temperature
Operators must keep refrigeration systems operating safely and efficiently. Which of the
following best describes the areas of required knowledge for this to be possible? (pg. 1-4)
A) Basic physical principles, interpretation of information from temperature and pressure
gauges, basic operating principles
B) Basic physical principles, interpretation of information from temperature and pressure
gauges, manufacturer of the equipment
C) Interpretation of information from temperature and pressure gauges, basic operating
principles, company quality control policies and procedures
D) Interpretation of information from temperature and pressure gauges, manufacturer of the
equipment, company quality control policies and procedures - ANS A) Basic physical
principles, interpretation of information from temperature and pressure gauges, basic
operating principles
Mechanical refrigeration is a series of steps that? (pg. 1-2)
1
Page
A) Moves heat energy from a space or object to an area where it can do no harm
@COPYRIGHT BRAINBARTER 2025/2026
, B) Adds cold to a space or object
C) Transforms heat energy into cold energy to reduce the temperature of the area to be cooled
D) Utilizes the cooling effect of compressing a gas to reduce the temperature in a space or
object - ANS A) Moves heat energy from a space or object to an area where it can do no
harm
Heat energy always flows? (pg. 1-23)
A) From a substance with more heat energy [measured in BTUs] to a substance with less heat
energy [ measured in BTUs]
B) Regardless of temperature
C) From an object at a higher temperature to an object at a lower temperature
D) From a liquid to a vapor - ANS C) From an object at a higher temperature to an object at a
lower temperature
Sensible heat? (pg. 1-22)
A) Is measured using a pressure gauge
B) Is always between 32°F and 212°F
C) Is heat energy that causes a change of state but does not cause a change in temperature
D) Is heat energy that causes a change in temperature but does not cause a change of state -
ANS D) Is heat energy that causes a change in temperature but does not cause a change of
state
Latent heat? (pg. 1-22)
A) Is measured using a pressure gauge
B) Can be sensed by using a thermometer
C) Is heat energy that causes a change of state but does not cause a change in temperature
D) Is heat energy that causes a change in temperature but does not cause a change of state -
ANS C) Is heat energy that causes a change of state but does not cause a change in
temperature
2
Page
@COPYRIGHT BRAINBARTER 2025/2026
, Which of the answers below is an example of heat transfer by convection? (pg. 1-36)
A) The Sun's rays
B) A rod that is heat on one end resulting in a temperature change at the other end
C) Warm air moving over an object
D) Heat transferred to a pan setting on an electric hot plate - ANS C) Warm air moving over
an object
How does the refrigeration technician/operator know what the conditions are within a
refrigeration system? (pg. 1-4)
A) By using his knowledge of system basic operating principles to evaluate temperature and
pressure readings
B) By observing the alarm annunciator panel, if no alarms are displayed the system is operating
efficiently and correctly
C) By keeping the discharge and suction pressures within specification the operator assures
proper system operationg
D) By observing product temperature, if the product is at temperature the system is operating
properly - ANS A) By using his knowledge of system basic operating principles to evaluate
temperature and pressure readings
How is cooling accomplished by a mechanical refrigeration system? (pg. 1-2)
A) By just pumping ice water through a space
B) By just adding cold air
C) By removing heat energy from an object or area
D) By increasing the molecular vibration of an object - ANS C) By removing heat energy from
an object or area
Which of the following is used to measure the quantity of heat energy? (pg. 1-21)
A) British Thermal Units (BTUs) or Calories
B) Pascals and Kilopascals
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Page
C) Degrees Kelvin
@COPYRIGHT BRAINBARTER 2025/2026
, D) Degrees Celsius or Fahrenheit - ANS A) British Thermal Units (BTUs) or Calories
Which of the following are used in heat calculations? (pg. 1-40
A) Mass, sensible heat, temperature, specific heat
B) Mass, latent heat, temperature, specific heat
C) Mass, sensible heat, heat of cooling, change of state
D) Mass, latent heat, temperature, heat of refrigeration - ANS B) Mass, latent heat,
temperature, specific heat
Latent heat of vaporization? (pg. 1-22)
A) Is calculated using temperature
B) Is always going to raise the temperature of the liquid it is trying to boil
C) Is the heat energy required to cause a liquid to become a vapor
D) Is the same for all liquids - ANS C) Is the heat energy required to cause a liquid to become
a vapor
Pressure is a measure of? (pg. 1-11)
A) The action seen from the attraction of gravity
B) Weight
C) The relationship of a force being applied over a given area
D) The distance between the top of the piston and the discharge valve of a reciprocating
compressor - ANS C) The relationship of a force being applied over a given area
The relationship between temperature difference and heat flow is? (pg. 1-23)
A) There is no relationship between temperature and heat flow
B) The greater the temperature difference, the slower heat flows
C) The greater the temperature difference, the more rapid heat flows
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Page
@COPYRIGHT BRAINBARTER 2025/2026
