Reta Caro Exam with all Correct & 100% Verified Answers
|Latest Version |Already Graded A+
Conduction is defined as heat energy that is ✔Correct Answer-moving through a solid
substance
What is the primary purpose of a refrigeration system ? ✔Correct Answer-achieve and
maintain a temperature
What is a hazard of trapping liquid ? ✔Correct Answer-A possible release
How much can the pressure of trapped liquid increase per degree Fahrenheit of temperature
increase ✔Correct Answer-100 to 150 psi
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
How does the refrigeration compressor maintain the temperature in the system evaporators ?
✔Correct Answer-Drawing out vaporized refrigerant at a rate to maintain the desired
evaporating pressure
Which natural refrigerant is considered to be non- flammable ✔Correct Answer-Carbon
Dioxide
Heat energy always flows ✔Correct Answer-from an object at a higher temperature to an
object at a lower temperature
32 psia equals ✔Correct Answer-17.3 psig
0 ° F is equal to ✔Correct Answer--18 ° C
Why does the refrigerant in the condenser change state from vapor to liquid ✔Correct
Answer-The refrigerant loses heat energy to the surrounding environment
If a liquid is below its saturation temperature what is its condition ? ✔Correct Answer-
Subcooled
What are the four necessary components of a mechanical refrigeration system ? ✔Correct
Answer-expansion device , evaporator , compressor , condenser
Superheat is found at which points of a typical system ? ✔Correct Answer-The compressor
suction and compressor discharge line
, What are the replacement blended refrigerants called ? ✔Correct Answer-An azeotrope or
zeotrope
What is one positive characteristic of halocarbon refrigerants ? ✔Correct Answer-They are
usually not flammable
What is the primary reason for concern about HCFC- 22 concentration in an engine room ?
✔Correct Answer-Oxygen deprivation
O psig is equal to ✔Correct Answer-14.7 psia
Discharge vapor from all compressors ✔Correct Answer-will contain some level of superheat
Which category of compressor " traps " a volume of refrigerant vapor prior to compression ?
✔Correct Answer-Positive displacement
When suction pressure rises , the operator should ✔Correct Answer-start another compressor
The crankcase oil heater should be ON ✔Correct Answer-when the compressor is off .
Slugging is caused by ✔Correct Answer-oil or liquid refrigerant
What should be done if liquid refrigerant appears while draining oil ? ✔Correct Answer-Do
what the SOP states
Proper oil management for a refrigeration system requires that ✔Correct Answer-a log should
record all oil added to and removed from a system
When heat is added to saturated liquid refrigerant it will always ✔Correct Answer-evaporate
What effect does the addition of fins to evaporator coils have ? ✔Correct Answer-It increases
the efficiency of a unit by increasing the surface area
During hot gas defrost ✔Correct Answer-high pressure gas flows through and condenses in
the evaporator
Evaporative condensers ✔Correct Answer-derive their heat rejection capability from the
evaporation of water
Air cooled condensers usually have ✔Correct Answer-higher head pressures than evaporative
condensers
|Latest Version |Already Graded A+
Conduction is defined as heat energy that is ✔Correct Answer-moving through a solid
substance
What is the primary purpose of a refrigeration system ? ✔Correct Answer-achieve and
maintain a temperature
What is a hazard of trapping liquid ? ✔Correct Answer-A possible release
How much can the pressure of trapped liquid increase per degree Fahrenheit of temperature
increase ✔Correct Answer-100 to 150 psi
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
How does the refrigeration compressor maintain the temperature in the system evaporators ?
✔Correct Answer-Drawing out vaporized refrigerant at a rate to maintain the desired
evaporating pressure
Which natural refrigerant is considered to be non- flammable ✔Correct Answer-Carbon
Dioxide
Heat energy always flows ✔Correct Answer-from an object at a higher temperature to an
object at a lower temperature
32 psia equals ✔Correct Answer-17.3 psig
0 ° F is equal to ✔Correct Answer--18 ° C
Why does the refrigerant in the condenser change state from vapor to liquid ✔Correct
Answer-The refrigerant loses heat energy to the surrounding environment
If a liquid is below its saturation temperature what is its condition ? ✔Correct Answer-
Subcooled
What are the four necessary components of a mechanical refrigeration system ? ✔Correct
Answer-expansion device , evaporator , compressor , condenser
Superheat is found at which points of a typical system ? ✔Correct Answer-The compressor
suction and compressor discharge line
, What are the replacement blended refrigerants called ? ✔Correct Answer-An azeotrope or
zeotrope
What is one positive characteristic of halocarbon refrigerants ? ✔Correct Answer-They are
usually not flammable
What is the primary reason for concern about HCFC- 22 concentration in an engine room ?
✔Correct Answer-Oxygen deprivation
O psig is equal to ✔Correct Answer-14.7 psia
Discharge vapor from all compressors ✔Correct Answer-will contain some level of superheat
Which category of compressor " traps " a volume of refrigerant vapor prior to compression ?
✔Correct Answer-Positive displacement
When suction pressure rises , the operator should ✔Correct Answer-start another compressor
The crankcase oil heater should be ON ✔Correct Answer-when the compressor is off .
Slugging is caused by ✔Correct Answer-oil or liquid refrigerant
What should be done if liquid refrigerant appears while draining oil ? ✔Correct Answer-Do
what the SOP states
Proper oil management for a refrigeration system requires that ✔Correct Answer-a log should
record all oil added to and removed from a system
When heat is added to saturated liquid refrigerant it will always ✔Correct Answer-evaporate
What effect does the addition of fins to evaporator coils have ? ✔Correct Answer-It increases
the efficiency of a unit by increasing the surface area
During hot gas defrost ✔Correct Answer-high pressure gas flows through and condenses in
the evaporator
Evaporative condensers ✔Correct Answer-derive their heat rejection capability from the
evaporation of water
Air cooled condensers usually have ✔Correct Answer-higher head pressures than evaporative
condensers
