RETA CARO EXAM QUESTIONS AND
ANSWERS 2025/2026
What is the purpose of a refrigeration system? - ANSWERSTo 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? -
ANSWERSBasic physical principles, interpretation of information from temperature and
pressure gauges, basic operating principles.
What is the scale used to measure Fahrenheit temperature absolute? -
ANSWERSRankine
Sensible heat: - ANSWERSis heat energy that causes a change in temperature but
does not cause a change of state.
Latent heat: - ANSWERSis heat energy that causes a change of state but does not
cause a change in temperature.
Which of the answers below is an example of heat transfer by convection? -
ANSWERSWarm air moving over an object.
Mechanical refrigeration is a series of steps that: - ANSWERSMoves heat energy from
a space or object to an area where it can do no harm.
Heat energy always flows: - ANSWERSfrom an object at a higher temperature to an
object at a lower temperature
Pressure is a measure of - ANSWERSthe relationship of a force being applied over a
given area.
The relationship between temperature difference and heat flow is. - ANSWERSThe
greater the temperature difference the more rapid the heat flows.
Specific heat - ANSWERSis greater as the substance requires more heat energy to
increase temperature.
How does the refrigeration technician/operator know what the conditions are within a
refrigeration system? - ANSWERSBy using his knowledge of system basic operating
principles to evaluate temperature and pressure readings.
Latent heat of vaporization - ANSWERSis the heat energy required to cause a liquid to
become a vapor.
ANSWERS 2025/2026
What is the purpose of a refrigeration system? - ANSWERSTo 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? -
ANSWERSBasic physical principles, interpretation of information from temperature and
pressure gauges, basic operating principles.
What is the scale used to measure Fahrenheit temperature absolute? -
ANSWERSRankine
Sensible heat: - ANSWERSis heat energy that causes a change in temperature but
does not cause a change of state.
Latent heat: - ANSWERSis heat energy that causes a change of state but does not
cause a change in temperature.
Which of the answers below is an example of heat transfer by convection? -
ANSWERSWarm air moving over an object.
Mechanical refrigeration is a series of steps that: - ANSWERSMoves heat energy from
a space or object to an area where it can do no harm.
Heat energy always flows: - ANSWERSfrom an object at a higher temperature to an
object at a lower temperature
Pressure is a measure of - ANSWERSthe relationship of a force being applied over a
given area.
The relationship between temperature difference and heat flow is. - ANSWERSThe
greater the temperature difference the more rapid the heat flows.
Specific heat - ANSWERSis greater as the substance requires more heat energy to
increase temperature.
How does the refrigeration technician/operator know what the conditions are within a
refrigeration system? - ANSWERSBy using his knowledge of system basic operating
principles to evaluate temperature and pressure readings.
Latent heat of vaporization - ANSWERSis the heat energy required to cause a liquid to
become a vapor.
