RETA CARO Exam Questions and Answers (New
2026/2027) 100% Correct | Latest Update | Graded A+.
Where can a list of the proper PPE needed to safely perform a
job task be
found? - ANSWER SOPs and
MPs
Which of the following requires hot work permits? -
ANSWER OSHA
regulations
How much can the pressure of trapped liquid increase per
degree
Fahrenheit of temperature increase? - ANSWER Between 100
and 150 psi
When working on an ammonia refrigeration system, which of
the following has the responsibility to use the proper PPE? -
ANSWER The technician or operator
OSHA regulations require persons wearing respiratory
protective equipment to have ______ - ANSWER a medical
evaluation to confirm fitness to wear the PPE.
,Lockout/Tagout required_____ - ANSWER anytime work
exposes an
employee to hazardous
energy.
What can be caused by trapped liquid? - ANSWER A possible
release
Which of the following is responsible to determine if an area is
considered
confined space? - ANSWER The
owner/employer
Fire watchers must be trained in_____ - ANSWER the
use of fire
extinguishing
equipment.
The reason for testing the application of a lockout device is
to_____ - ANSWER confirm that the energy source has indeed
been made safe.
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? - ANSWER Basic
,physical principles, interpretation of information from
temperature and pressure gauges, basic operating principles.
Mechanical refrigeration is a series of steps that ______ -
ANSWER moves
heat energy from a space or object to an area where it can do
no harm.
Heat energy always flows _______ - ANSWER from an object
at a higher
temperature to an object at a lower
temperature.
Sensible heat ______ - ANSWER is heat energy that causes a
change in
temperature but does not cause a change of
state.
Latent heat ______ - 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?
- ANSWER Warm air rising and cold air
falling.
, How does the refrigeration technician/operator know what the
conditions
are within a refrigeration system? - 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? -
ANSWER
Rankine
Which of the following is used to measure the quantity of heat
energy? -
ANSWER British Thermal Units (BTUs) or
calories
During an arc flash event, what is the conductor? - ANSWER
The air
As an arc flash fault continues, the arc flash explosion
expansion is
estimated to be how large? - ANSWER
40,000 to 1
What is the purpose of a refrigeration system? - ANSWER To
maintain a
2026/2027) 100% Correct | Latest Update | Graded A+.
Where can a list of the proper PPE needed to safely perform a
job task be
found? - ANSWER SOPs and
MPs
Which of the following requires hot work permits? -
ANSWER OSHA
regulations
How much can the pressure of trapped liquid increase per
degree
Fahrenheit of temperature increase? - ANSWER Between 100
and 150 psi
When working on an ammonia refrigeration system, which of
the following has the responsibility to use the proper PPE? -
ANSWER The technician or operator
OSHA regulations require persons wearing respiratory
protective equipment to have ______ - ANSWER a medical
evaluation to confirm fitness to wear the PPE.
,Lockout/Tagout required_____ - ANSWER anytime work
exposes an
employee to hazardous
energy.
What can be caused by trapped liquid? - ANSWER A possible
release
Which of the following is responsible to determine if an area is
considered
confined space? - ANSWER The
owner/employer
Fire watchers must be trained in_____ - ANSWER the
use of fire
extinguishing
equipment.
The reason for testing the application of a lockout device is
to_____ - ANSWER confirm that the energy source has indeed
been made safe.
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? - ANSWER Basic
,physical principles, interpretation of information from
temperature and pressure gauges, basic operating principles.
Mechanical refrigeration is a series of steps that ______ -
ANSWER moves
heat energy from a space or object to an area where it can do
no harm.
Heat energy always flows _______ - ANSWER from an object
at a higher
temperature to an object at a lower
temperature.
Sensible heat ______ - ANSWER is heat energy that causes a
change in
temperature but does not cause a change of
state.
Latent heat ______ - 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?
- ANSWER Warm air rising and cold air
falling.
, How does the refrigeration technician/operator know what the
conditions
are within a refrigeration system? - 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? -
ANSWER
Rankine
Which of the following is used to measure the quantity of heat
energy? -
ANSWER British Thermal Units (BTUs) or
calories
During an arc flash event, what is the conductor? - ANSWER
The air
As an arc flash fault continues, the arc flash explosion
expansion is
estimated to be how large? - ANSWER
40,000 to 1
What is the purpose of a refrigeration system? - ANSWER To
maintain a
