RETA CARO BOOK QUESTION AND ANSWERS 2024-2025
GUIDE
1. What is the purpose of a refrigeration system D. To maintain a tempera-
A. To freeze food ture
B. To cool buildings
C. To preserve food
D. To maintain a temperature
2. Operators must keep refrigeration systems operating A. Basic physical princi-
safely and efficiently. Which of the following best de- ples, Interpreparation of
scribes the areas of required knowledge for this to be information from tem-
possible? perature and pressure
gauges. Basic operating
A. Basic physical principles, interpretation of informa- principles.
tion from temperature and pressure guages. Basic
operating principles.
B. Basic physical principles, interpretation of informa-
tion from temperature and pressure guages. Manu-
facturer of the equipment
C. Interpretation of information from temperature
and pressure guages. Basic operating principles, com-
pany quality control policies and procedures.
3. Mechanical refrigeration is a series of steps that A. Moves heat energy from
A. Moves heat energy from a space or object to an area a space or object to an
where it can do no harm area where it can do no
B. Adds cold to a space or object harm
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
4. Heat energy always flows C. From an object at a
A. From a substance with more heat energy to a sub- higher temperature to an
, RETA CARO BOOK QUESTION AND ANSWERS 2024-2025
GUIDE
stance with less heat energy object at a lower temper-
B. Regardless of temperature ature
C. From an object at a higher temperature to an object
at a lower temperature
D. From a liquid to a vapor
5. Sensible heat Is heat energy that caus-
A. Is measured using a pressure guage es a change in tempera-
B. Is always between 32 and 212 degrees Fahrenheit ture but does not cause a
C. Is heat energy that causes a change of state but change of state
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
6. latent heat C. Is heat energy that
A. Is measured using a pressure guage causes a change of state
B. Can be sensed by using a thermometer but does not cause a
C. Is heat energy that causes a change of state but change of state
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
7. Which of the answers below is an example of heat C. Warm air rising and
transfer by convection cold air falling
A. The suns rays hitting roof
B. A rod that is heated on one end resulting in a tem-
perature 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
8. How does the refrigeration technician/operator know By using his knowledge
what the conditions are within a refrigeration system of system basic operat-
, RETA CARO BOOK QUESTION AND ANSWERS 2024-2025
GUIDE
ing principles to evaluate
temperature and pressure
readings
9. What is the scale used to measure Fahrenheit temper- B. Rankine
ature absolute
A. Extreme
B. Rankine
C. Celsius
D. Kelvin
10. Which of the following is used to measure the quantity A. British Thermal Units
of heat energy
A. British Thermal Units
B. Pascals and Kilopascals
C. Degrees Kelvin
D. Degrees Celsius or Fahrenheit
11. When calculating the BTU's that have to be removed B. Pounds of substance,
to change temperature of a substance, what combi- temperature ditterence,
nation of the following is used? specific heat
A. Pounds of substance, sensible heat, temperature
B. Pounds of substance, temperature difference, spe-
cific heat
C. Pounds of substance, heat of cooling, change of
state
D. Pounds of substance, latent heat, heat of refrigera-
tion
12. latent heat of vaporization Is the heat energy re-
A. Is calculated using temperature quired to cause a liquid to
B. Is always going to raise the temperature of the become a vapor
liquid it is trying to boil
GUIDE
1. What is the purpose of a refrigeration system D. To maintain a tempera-
A. To freeze food ture
B. To cool buildings
C. To preserve food
D. To maintain a temperature
2. Operators must keep refrigeration systems operating A. Basic physical princi-
safely and efficiently. Which of the following best de- ples, Interpreparation of
scribes the areas of required knowledge for this to be information from tem-
possible? perature and pressure
gauges. Basic operating
A. Basic physical principles, interpretation of informa- principles.
tion from temperature and pressure guages. Basic
operating principles.
B. Basic physical principles, interpretation of informa-
tion from temperature and pressure guages. Manu-
facturer of the equipment
C. Interpretation of information from temperature
and pressure guages. Basic operating principles, com-
pany quality control policies and procedures.
3. Mechanical refrigeration is a series of steps that A. Moves heat energy from
A. Moves heat energy from a space or object to an area a space or object to an
where it can do no harm area where it can do no
B. Adds cold to a space or object harm
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
4. Heat energy always flows C. From an object at a
A. From a substance with more heat energy to a sub- higher temperature to an
, RETA CARO BOOK QUESTION AND ANSWERS 2024-2025
GUIDE
stance with less heat energy object at a lower temper-
B. Regardless of temperature ature
C. From an object at a higher temperature to an object
at a lower temperature
D. From a liquid to a vapor
5. Sensible heat Is heat energy that caus-
A. Is measured using a pressure guage es a change in tempera-
B. Is always between 32 and 212 degrees Fahrenheit ture but does not cause a
C. Is heat energy that causes a change of state but change of state
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
6. latent heat C. Is heat energy that
A. Is measured using a pressure guage causes a change of state
B. Can be sensed by using a thermometer but does not cause a
C. Is heat energy that causes a change of state but change of state
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
7. Which of the answers below is an example of heat C. Warm air rising and
transfer by convection cold air falling
A. The suns rays hitting roof
B. A rod that is heated on one end resulting in a tem-
perature 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
8. How does the refrigeration technician/operator know By using his knowledge
what the conditions are within a refrigeration system of system basic operat-
, RETA CARO BOOK QUESTION AND ANSWERS 2024-2025
GUIDE
ing principles to evaluate
temperature and pressure
readings
9. What is the scale used to measure Fahrenheit temper- B. Rankine
ature absolute
A. Extreme
B. Rankine
C. Celsius
D. Kelvin
10. Which of the following is used to measure the quantity A. British Thermal Units
of heat energy
A. British Thermal Units
B. Pascals and Kilopascals
C. Degrees Kelvin
D. Degrees Celsius or Fahrenheit
11. When calculating the BTU's that have to be removed B. Pounds of substance,
to change temperature of a substance, what combi- temperature ditterence,
nation of the following is used? specific heat
A. Pounds of substance, sensible heat, temperature
B. Pounds of substance, temperature difference, spe-
cific heat
C. Pounds of substance, heat of cooling, change of
state
D. Pounds of substance, latent heat, heat of refrigera-
tion
12. latent heat of vaporization Is the heat energy re-
A. Is calculated using temperature quired to cause a liquid to
B. Is always going to raise the temperature of the become a vapor
liquid it is trying to boil
