RAC 40 Quiz 3 review Exam Questions
And Answers 100% Solved Correct (A+
Solution Guide)
The _____ compressor is another positive displacement compressor and is used for
larger air conditioning and refrigeration applications. - Answers -✔✔ Screw Compressor
The four (4) major components of a vapor compression refrigeration system are the
compressor, condenser, evaporator, and ________ ______. - Answers -✔✔ Metering
device
The amount of heat a refrigerant contains with -40F as the 0 heat content reference
point is called - Answers -✔✔ Enthalpy
From a performance standpoint, a substitute for R-12 is - Answers -✔✔ R-134A
The ___________ __________ is referred to as a kinetic displacement compressor. -
Answers -✔✔ Centrifugal Compressor
The refrigerant vapor picks up additional heat as it flows from the evaporator to the
compressor. The heat is picked up from the - Answers -✔✔ Suction line
What is the purpose of the metering device? - Answers -✔✔ Meters the flow of
refrigerant entering the evaporator, reduces the boiling point to create a
pressure/temperature drop
When the refrigerant leaves the metering device, it is not 100% liquid. Why? - Answers -
✔✔ Because flash gas occurs and causes the 100% liquid to turn into 25% vapor and
75% liquid.
Rejects both sensible and latent heat from the refrigeration system. - Answers -✔✔
Condenser
Abort heat from the system - Answers -✔✔ Evaporator
Is the heart of the refrigeration system - Answers -✔✔ Compressor
A valve or small fixed-size tubing or orifice that meters liquid refrigerant into the
evaporator - Answers -✔✔ Metering device
R-502 - Answers -✔✔ Orchid
, R-12 - Answers -✔✔ White
R-717 - Answers -✔✔ Silver
R-11 - Answers -✔✔ Orange
R-114 - Answers -✔✔ Dark Blue
R-134a - Answers -✔✔ Light Blue
R-113 - Answers -✔✔ Purple
R-500 - Answers -✔✔ Yellow Orange
R-22 - Answers -✔✔ Green
Good ventilation is important when working around refrigeration equipment because
modern refrigerants ______. - Answers -✔✔ Are heavier than air and may displace the
oxygen around you
The __________ relationship correlates the vapor pressure and the boiling point of
water and is the basis for controlling the cooling system's temperatures. - Answers -✔✔
Temperature/pressure
Which of the following refrigerants has the lowest boiling temperatures at atmospheric
pressure? - Answers -✔✔ R-502
The compressor in a refrigeration system _______. - Answers -✔✔ Pumps the
refrigerant throughout the system
A ton of refrigeration is equal to - Answers -✔✔ 288,000 Btu/24-Hr
The law requires technicians to recover refrigerant from all refrigeration systems so that
they ________. - Answers -✔✔ Will not be released into the atmosphere, May be used
again, May be reclaimed for future use.
Refrigeration can be described as _______. - Answers -✔✔ The process of removing
heat from a place where it isn't wanted to place where it makes little or no difference
The temperature inside the refrigerator fresh food section should be about _______. -
Answers -✔✔ 35 degrees F
And Answers 100% Solved Correct (A+
Solution Guide)
The _____ compressor is another positive displacement compressor and is used for
larger air conditioning and refrigeration applications. - Answers -✔✔ Screw Compressor
The four (4) major components of a vapor compression refrigeration system are the
compressor, condenser, evaporator, and ________ ______. - Answers -✔✔ Metering
device
The amount of heat a refrigerant contains with -40F as the 0 heat content reference
point is called - Answers -✔✔ Enthalpy
From a performance standpoint, a substitute for R-12 is - Answers -✔✔ R-134A
The ___________ __________ is referred to as a kinetic displacement compressor. -
Answers -✔✔ Centrifugal Compressor
The refrigerant vapor picks up additional heat as it flows from the evaporator to the
compressor. The heat is picked up from the - Answers -✔✔ Suction line
What is the purpose of the metering device? - Answers -✔✔ Meters the flow of
refrigerant entering the evaporator, reduces the boiling point to create a
pressure/temperature drop
When the refrigerant leaves the metering device, it is not 100% liquid. Why? - Answers -
✔✔ Because flash gas occurs and causes the 100% liquid to turn into 25% vapor and
75% liquid.
Rejects both sensible and latent heat from the refrigeration system. - Answers -✔✔
Condenser
Abort heat from the system - Answers -✔✔ Evaporator
Is the heart of the refrigeration system - Answers -✔✔ Compressor
A valve or small fixed-size tubing or orifice that meters liquid refrigerant into the
evaporator - Answers -✔✔ Metering device
R-502 - Answers -✔✔ Orchid
, R-12 - Answers -✔✔ White
R-717 - Answers -✔✔ Silver
R-11 - Answers -✔✔ Orange
R-114 - Answers -✔✔ Dark Blue
R-134a - Answers -✔✔ Light Blue
R-113 - Answers -✔✔ Purple
R-500 - Answers -✔✔ Yellow Orange
R-22 - Answers -✔✔ Green
Good ventilation is important when working around refrigeration equipment because
modern refrigerants ______. - Answers -✔✔ Are heavier than air and may displace the
oxygen around you
The __________ relationship correlates the vapor pressure and the boiling point of
water and is the basis for controlling the cooling system's temperatures. - Answers -✔✔
Temperature/pressure
Which of the following refrigerants has the lowest boiling temperatures at atmospheric
pressure? - Answers -✔✔ R-502
The compressor in a refrigeration system _______. - Answers -✔✔ Pumps the
refrigerant throughout the system
A ton of refrigeration is equal to - Answers -✔✔ 288,000 Btu/24-Hr
The law requires technicians to recover refrigerant from all refrigeration systems so that
they ________. - Answers -✔✔ Will not be released into the atmosphere, May be used
again, May be reclaimed for future use.
Refrigeration can be described as _______. - Answers -✔✔ The process of removing
heat from a place where it isn't wanted to place where it makes little or no difference
The temperature inside the refrigerator fresh food section should be about _______. -
Answers -✔✔ 35 degrees F
