RETA CARO TEST BANK QUESTIONS AND
ANSWERS 2026 | Complete Review Pack
| A+
• 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 -✓✓-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
• The crankcase oil heater should be ON -✓✓when the compressor is
off .
ANSWERS 2026 | Complete Review Pack
| A+
• 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 -✓✓-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
• The crankcase oil heater should be ON -✓✓when the compressor is
off .
