CARO BOOK QUESTION AND
ANSWERS GRADED A+ PASSED
What is the purpose of a refrigeration system
A. To freeze food
B. To cool buildings
C. To preserve food
D. To maintain a temperature - correct answer ✔✔ 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?
A. Basic physical principles, interpretation of information from temperature and pressure
guages. Basic operating principles.
B. Basic physical principles, interpretation of information from temperature and pressure
guages. Manufacturer of the equipment
C. Interpretation of information from temperature and pressure guages. Basic operating
principles, company quality control policies and procedures. - correct answer ✔✔ A. Basic
physical principles, Interpreparation of information from temperature and pressure gauges.
Basic operating principles.
Mechanical refrigeration is a series of steps that
A. Moves heat energy from a space or object to an area where it can do no harm
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 - correct answer ✔✔ A. Moves heat energy from a space or object to an area where it
can do no harm
Heat energy always flows
A. From a substance with more heat energy to a substance with less heat energy
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 - correct answer ✔✔ C. From an object at a higher temperature to
an object at a lower temperature
Sensible heat
A. Is measured using a pressure guage
B. Is always between 32 and 212 degrees Fahrenheit
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 -
correct answer ✔✔ Is heat energy that causes a change in temperature but does not cause a
change of state
latent heat
A. Is measured using a pressure guage
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 -
correct answer ✔✔ C. Is heat energy that causes a change of state but does not cause a change
of state
Which of the answers below is an example of heat transfer by convection
, A. The suns rays hitting roof
B. A rod that is heated on one end resulting in a temperature change at the other end
C. Warm air rising and cold air falling
D. Heat transferred to a pan setting on an electric hot plate - correct answer ✔✔ C. Warm air
rising and cold air falling
How does the refrigeration technician/operator know what the conditions are within a
refrigeration system - correct answer ✔✔ By using his knowledge of system basic operating
principles to evaluate temperature and pressure readings
What is the scale used to measure Fahrenheit temperature absolute
A. Extreme
B. Rankine
C. Celsius
D. Kelvin - correct answer ✔✔ B. Rankine
Which of the following is used to measure the quantity of heat energy
A. British Thermal Units
B. Pascals and Kilopascals
C. Degrees Kelvin
D. Degrees Celsius or Fahrenheit - correct answer ✔✔ A. British Thermal Units
When calculating the BTU's that have to be removed to change temperature of a substance,
what combination of the following is used?
A. Pounds of substance, sensible heat, temperature
B. Pounds of substance, temperature difference, specific heat
C. Pounds of substance, heat of cooling, change of state
ANSWERS GRADED A+ PASSED
What is the purpose of a refrigeration system
A. To freeze food
B. To cool buildings
C. To preserve food
D. To maintain a temperature - correct answer ✔✔ 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?
A. Basic physical principles, interpretation of information from temperature and pressure
guages. Basic operating principles.
B. Basic physical principles, interpretation of information from temperature and pressure
guages. Manufacturer of the equipment
C. Interpretation of information from temperature and pressure guages. Basic operating
principles, company quality control policies and procedures. - correct answer ✔✔ A. Basic
physical principles, Interpreparation of information from temperature and pressure gauges.
Basic operating principles.
Mechanical refrigeration is a series of steps that
A. Moves heat energy from a space or object to an area where it can do no harm
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 - correct answer ✔✔ A. Moves heat energy from a space or object to an area where it
can do no harm
Heat energy always flows
A. From a substance with more heat energy to a substance with less heat energy
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 - correct answer ✔✔ C. From an object at a higher temperature to
an object at a lower temperature
Sensible heat
A. Is measured using a pressure guage
B. Is always between 32 and 212 degrees Fahrenheit
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 -
correct answer ✔✔ Is heat energy that causes a change in temperature but does not cause a
change of state
latent heat
A. Is measured using a pressure guage
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 -
correct answer ✔✔ C. Is heat energy that causes a change of state but does not cause a change
of state
Which of the answers below is an example of heat transfer by convection
, A. The suns rays hitting roof
B. A rod that is heated on one end resulting in a temperature change at the other end
C. Warm air rising and cold air falling
D. Heat transferred to a pan setting on an electric hot plate - correct answer ✔✔ C. Warm air
rising and cold air falling
How does the refrigeration technician/operator know what the conditions are within a
refrigeration system - correct answer ✔✔ By using his knowledge of system basic operating
principles to evaluate temperature and pressure readings
What is the scale used to measure Fahrenheit temperature absolute
A. Extreme
B. Rankine
C. Celsius
D. Kelvin - correct answer ✔✔ B. Rankine
Which of the following is used to measure the quantity of heat energy
A. British Thermal Units
B. Pascals and Kilopascals
C. Degrees Kelvin
D. Degrees Celsius or Fahrenheit - correct answer ✔✔ A. British Thermal Units
When calculating the BTU's that have to be removed to change temperature of a substance,
what combination of the following is used?
A. Pounds of substance, sensible heat, temperature
B. Pounds of substance, temperature difference, specific heat
C. Pounds of substance, heat of cooling, change of state
