RETA CARO Exam Questions
And Answers.
What is the purpose of a refrigeration system? - Correct Answer - 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? - Correct Answer - Basic physical
principles, interpretation of information from temperature and pressure gauges, basic operating
principles.
Mechanical refrigeration is a series of steps that: - Correct Answer - Moves heat energy from a space or
object to an area where it can do no harm.
Heat energy always flows: - Correct Answer - from an object at a higher temperature to an object at a
lower temperature
Sensible heat: - Correct Answer - is heat energy that causes a change in temperature but does not cause
a change of state.
Latent heat: - Correct Answer - is 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? - Correct Answer - Warm air
moving over an object.
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? - Correct Answer - Rankine
Which of the following is used to measure the quantity of heat energy? - Correct Answer - British
Thermal Units (BTUS) or calories.
When calculating the BTUS that have to be removed to cool a substance, what combination of the
following is used? - Correct Answer - pounds of substance, temperature difference, specific heat
Latent heat of vaporization - Correct Answer - is the heat energy required to cause a liquid to become a
vapor.
https://www.stuvia.com/user/DREAMS
And Answers.
What is the purpose of a refrigeration system? - Correct Answer - 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? - Correct Answer - Basic physical
principles, interpretation of information from temperature and pressure gauges, basic operating
principles.
Mechanical refrigeration is a series of steps that: - Correct Answer - Moves heat energy from a space or
object to an area where it can do no harm.
Heat energy always flows: - Correct Answer - from an object at a higher temperature to an object at a
lower temperature
Sensible heat: - Correct Answer - is heat energy that causes a change in temperature but does not cause
a change of state.
Latent heat: - Correct Answer - is 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? - Correct Answer - Warm air
moving over an object.
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? - Correct Answer - Rankine
Which of the following is used to measure the quantity of heat energy? - Correct Answer - British
Thermal Units (BTUS) or calories.
When calculating the BTUS that have to be removed to cool a substance, what combination of the
following is used? - Correct Answer - pounds of substance, temperature difference, specific heat
Latent heat of vaporization - Correct Answer - is the heat energy required to cause a liquid to become a
vapor.
https://www.stuvia.com/user/DREAMS
