CARO BOOK QUESTION
1. 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: D. To maintain a temperature
2. 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.: A. Basic physical
principles, Interpreparation of information from temperature and pressure gauges. Basic
operating principles.
3. 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: A. Moves heat energy from a space or object to an area where it can
do no harm
4. 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: C. From an object at a higher temperature to an object at a
lower temperature
,5. 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: Is heat energy that causes a change in temperature but does not cause
a change of state
6. 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: C. Is heat energy that causes a change of state but does not cause a
change of state
7. 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: C. Warm air rising and cold
air falling
8. How does the refrigeration technician/operator know what the conditions are
within a refrigeration system: By using his knowledge of system basic operating principles
to evaluate temperature and pressure readings
9. What is the scale used to measure Fahrenheit temperature absolute
A. Extreme
B. Rankine
C. Celsius
D. Kelvin: B. Rankine
10. 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: A. British Thermal Units
11 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
D. Pounds of substance, latent heat, heat of refrigeration: B. Pounds of substance,
temperature difference, specific heat
12. latent heat of vaporization
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: Is the heat energy required to cause a liquid to become a
vapor
13. Pressure is a measure of
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 post on and the discharge valve of a
reciprocating compressor: C. The relationship of a force being applied over a given area
14. What is the relationship between temperature difference and heat flow
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 the heat flows
D. The more rapidly the heat flows, the greater the temperature increases: C. The greater
the temperature difference, the more rapid the heat flows
15. Specific heat
A. Is greater if the substance requires more heat energy to increase the tem-perature
1. 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: D. To maintain a temperature
2. 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.: A. Basic physical
principles, Interpreparation of information from temperature and pressure gauges. Basic
operating principles.
3. 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: A. Moves heat energy from a space or object to an area where it can
do no harm
4. 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: C. From an object at a higher temperature to an object at a
lower temperature
,5. 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: Is heat energy that causes a change in temperature but does not cause
a change of state
6. 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: C. Is heat energy that causes a change of state but does not cause a
change of state
7. 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: C. Warm air rising and cold
air falling
8. How does the refrigeration technician/operator know what the conditions are
within a refrigeration system: By using his knowledge of system basic operating principles
to evaluate temperature and pressure readings
9. What is the scale used to measure Fahrenheit temperature absolute
A. Extreme
B. Rankine
C. Celsius
D. Kelvin: B. Rankine
10. 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: A. British Thermal Units
11 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
D. Pounds of substance, latent heat, heat of refrigeration: B. Pounds of substance,
temperature difference, specific heat
12. latent heat of vaporization
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: Is the heat energy required to cause a liquid to become a
vapor
13. Pressure is a measure of
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 post on and the discharge valve of a
reciprocating compressor: C. The relationship of a force being applied over a given area
14. What is the relationship between temperature difference and heat flow
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 the heat flows
D. The more rapidly the heat flows, the greater the temperature increases: C. The greater
the temperature difference, the more rapid the heat flows
15. Specific heat
A. Is greater if the substance requires more heat energy to increase the tem-perature
