RETA CARO
Reta Caro Exam Practice Test Study
Questions and Answers 2026
Conduction is defined as heat energy that is
moving through a solid substance
What is the primary purpose of a refrigeration system ?
achieve and maintain a temperature
What is a hazard of trapping liquid ?
A possible release
How much can the pressure of trapped liquid increase per degree Fahrenheit of
temperature increase
100 to 150 psi
Mechanical refrigeration is a series of steps that
moves heat energy from a space or object to an area where it can do no harm
How does the refrigeration compressor maintain the temperature in the system
evaporators ?
Drawing out vaporized refrigerant at a rate to maintain the desired evaporating
pressure
Which natural refrigerant is considered to be non- flammable
Carbon Dioxide
Heat energy always flows
from an object at a higher temperature to an object at a lower temperature
32 psia equals
17.3 psig
0 ° F is equal to
RETA CARO
, RETA CARO
-18 ° C
Why does the refrigerant in the condenser change state from vapor to liquid
The refrigerant loses heat energy to the surrounding environment
If a liquid is below its saturation temperature what is its condition ?
Subcooled
What are the four necessary components of a mechanical refrigeration system ?
expansion device , evaporator , compressor , condenser
Superheat is found at which points of a typical system ?
The compressor suction and compressor discharge line
What are the replacement blended refrigerants called ?
An azeotrope or zeotrope
What is one positive characteristic of halocarbon refrigerants ?
They are usually not flammable
What is the primary reason for concern about HCFC- 22 concentration in an engine
room ?
Oxygen deprivation
O psig is equal to
14.7 psia
Discharge vapor from all compressors
will contain some level of superheat
Which category of compressor " traps " a volume of refrigerant vapor prior to
compression ?
Positive displacement
When suction pressure rises , the operator should
start another compressor
RETA CARO
Reta Caro Exam Practice Test Study
Questions and Answers 2026
Conduction is defined as heat energy that is
moving through a solid substance
What is the primary purpose of a refrigeration system ?
achieve and maintain a temperature
What is a hazard of trapping liquid ?
A possible release
How much can the pressure of trapped liquid increase per degree Fahrenheit of
temperature increase
100 to 150 psi
Mechanical refrigeration is a series of steps that
moves heat energy from a space or object to an area where it can do no harm
How does the refrigeration compressor maintain the temperature in the system
evaporators ?
Drawing out vaporized refrigerant at a rate to maintain the desired evaporating
pressure
Which natural refrigerant is considered to be non- flammable
Carbon Dioxide
Heat energy always flows
from an object at a higher temperature to an object at a lower temperature
32 psia equals
17.3 psig
0 ° F is equal to
RETA CARO
, RETA CARO
-18 ° C
Why does the refrigerant in the condenser change state from vapor to liquid
The refrigerant loses heat energy to the surrounding environment
If a liquid is below its saturation temperature what is its condition ?
Subcooled
What are the four necessary components of a mechanical refrigeration system ?
expansion device , evaporator , compressor , condenser
Superheat is found at which points of a typical system ?
The compressor suction and compressor discharge line
What are the replacement blended refrigerants called ?
An azeotrope or zeotrope
What is one positive characteristic of halocarbon refrigerants ?
They are usually not flammable
What is the primary reason for concern about HCFC- 22 concentration in an engine
room ?
Oxygen deprivation
O psig is equal to
14.7 psia
Discharge vapor from all compressors
will contain some level of superheat
Which category of compressor " traps " a volume of refrigerant vapor prior to
compression ?
Positive displacement
When suction pressure rises , the operator should
start another compressor
RETA CARO
