RETA Industrial Refrigeration Book 1 (2025 Revision) EXAM 2025–2026
Real EVALUATED Questions and Revised HIGHLIGHTED Correct Answers
(RELEASED)
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
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
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
C) Degrees Kelvin
D) Degrees Celsius or Fahrenheit
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,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
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
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
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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,D) The more rapidly the heat flows the greater the temperature increases
C) The greater the temperature difference, the more rapid heat flows
Specific heat? (pg. 1-29)
A) Is greater as the substance requires more heat energy to increase temperature
B) Is less as the substance requires more heat energy to increase temperature
C) Is 1 BTU/lb/degree Fahrenheit for all substances
D) Is related to change of state, not temperature change of a substance
A) Is greater as the substance requires more heat energy to increase temperature
Temperature is a measure of? (pg. 1-18)
A) The latent heat of an object
B) Heat of fusion that has been absorbed by an object
C) Heat of vaporization
D) The intensity of the heat energy in an object
D) The intensity of the heat energy in an object
If the force acting on an area of 5 square inches is 150 lbs., what is the pressure on the area? (pg. 1-
11)
A) 30 lb/in2
B) 750 lb/in2
C) 155 lb/in2
D) 3750 lb/in2
A) 30 lb/in2
Using the vapor pressure curve for ammonia, 70°F equals approximately? (pg. 1-33)
A) 38 PSIG
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, B) 40 PSIG
C) 70 PSIG
D) 114 PSIG
D) 114 psig
Thirty-two PSIA equals? (pg. 1-15)
A) 46.7 PSIG
B) 17.3 PSIG
C) 3.2 in. Hg
D) 760 mm Hg
B) 17.3 psig
The pressure midway between 0 PSIA and 0 PSIG is? (pg. 1-17)
A) 7.35 PSIA
B) 7.35 PSIG
C) 7.35 in. Hg
D) 0 in. Hg
A) 7.35 PSIA
Which of the answers below is an example of heat transfer by conduction? (pg. 1-35)
A) The sun's rays
B) A rod heated on one end becoming warm at the other end
C) Product being frozen in a blast freezer
D) Heat felt from a campfire when standing upwind
B) A rod heated on one end becoming warm at the other end
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Real EVALUATED Questions and Revised HIGHLIGHTED Correct Answers
(RELEASED)
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
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
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
C) Degrees Kelvin
D) Degrees Celsius or Fahrenheit
Page | 1
,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
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
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
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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,D) The more rapidly the heat flows the greater the temperature increases
C) The greater the temperature difference, the more rapid heat flows
Specific heat? (pg. 1-29)
A) Is greater as the substance requires more heat energy to increase temperature
B) Is less as the substance requires more heat energy to increase temperature
C) Is 1 BTU/lb/degree Fahrenheit for all substances
D) Is related to change of state, not temperature change of a substance
A) Is greater as the substance requires more heat energy to increase temperature
Temperature is a measure of? (pg. 1-18)
A) The latent heat of an object
B) Heat of fusion that has been absorbed by an object
C) Heat of vaporization
D) The intensity of the heat energy in an object
D) The intensity of the heat energy in an object
If the force acting on an area of 5 square inches is 150 lbs., what is the pressure on the area? (pg. 1-
11)
A) 30 lb/in2
B) 750 lb/in2
C) 155 lb/in2
D) 3750 lb/in2
A) 30 lb/in2
Using the vapor pressure curve for ammonia, 70°F equals approximately? (pg. 1-33)
A) 38 PSIG
Page | 3
, B) 40 PSIG
C) 70 PSIG
D) 114 PSIG
D) 114 psig
Thirty-two PSIA equals? (pg. 1-15)
A) 46.7 PSIG
B) 17.3 PSIG
C) 3.2 in. Hg
D) 760 mm Hg
B) 17.3 psig
The pressure midway between 0 PSIA and 0 PSIG is? (pg. 1-17)
A) 7.35 PSIA
B) 7.35 PSIG
C) 7.35 in. Hg
D) 0 in. Hg
A) 7.35 PSIA
Which of the answers below is an example of heat transfer by conduction? (pg. 1-35)
A) The sun's rays
B) A rod heated on one end becoming warm at the other end
C) Product being frozen in a blast freezer
D) Heat felt from a campfire when standing upwind
B) A rod heated on one end becoming warm at the other end
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