RETA CARO
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RETA CARO Chapter 2 Exam With Complete Solutions 
Four required components of a mechanical refrigeration system 
Expansion device, evaporator, compressor, condenser 
 
 
Purpose of the Expansion Device 
1) To separate the high pressure side of the system and the low pressure side of the system 
2) Responsible for metering the proper amount of liquid into the evaporator 
 
 
Flash Gas 
The vapor that results from the expansion process (no practical cooling is done by this item) 
 
 
Purpose of Ev...
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RETA CARO Chapter 2 Exam With Complete Solutions 
Four required components of a mechanical refrigeration system 
Expansion device, evaporator, compressor, condenser 
 
 
Purpose of the Expansion Device 
1) To separate the high pressure side of the system and the low pressure side of the system 
2) Responsible for metering the proper amount of liquid into the evaporator 
 
 
Flash Gas 
The vapor that results from the expansion process (no practical cooling is done by this item) 
 
 
Purpose of Ev...
RETA CARO Chapter 1 Exam Questions With Verified Solutions 
Purpose of a Refrigeration System 
Achieve or maintain proper temperatures in a refrigeration process used for cooling/freezing applications 
 
 
Ton of Refrigeration 
Rate BTUs transfer per unit time 
288,000 BTUs/24 Hours 
12,000 BTUs/12 Hours 
200 BTUs/1 Minute 
 
rate of refrigeration or cooling 
 
 
Pressure 
Force per unit area. 
 
 
PSIA 
Absolute pressure; measures pressure from zero pressure 
 
 
PSIG 
Gauge pressure, uses atmo...
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RETA CARO Chapter 1 Exam Questions With Verified Solutions 
Purpose of a Refrigeration System 
Achieve or maintain proper temperatures in a refrigeration process used for cooling/freezing applications 
 
 
Ton of Refrigeration 
Rate BTUs transfer per unit time 
288,000 BTUs/24 Hours 
12,000 BTUs/12 Hours 
200 BTUs/1 Minute 
 
rate of refrigeration or cooling 
 
 
Pressure 
Force per unit area. 
 
 
PSIA 
Absolute pressure; measures pressure from zero pressure 
 
 
PSIG 
Gauge pressure, uses atmo...
Reta Caro Study Guide JH Exam Questions With Verified Solutions 
Which is equal to 22 Psig? 
36.7 Psia 
 
 
What is the Latent Heat of Vaporization?(H2O) 
970 Btu's 
 
 
What product requires the most energy to lower 1 lb. by 1 degree? 
water 
 
 
What happens when pressure on a liquid is increased? 
Boiling point goes up/Saturation temp. goes up 
 
 
What happens when vapor is Superheated? 
Temperature above saturated/it gains sensible heat 0.5x1 degree F 
 
 
What causes heat to move from one...
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Reta Caro Study Guide JH Exam Questions With Verified Solutions 
Which is equal to 22 Psig? 
36.7 Psia 
 
 
What is the Latent Heat of Vaporization?(H2O) 
970 Btu's 
 
 
What product requires the most energy to lower 1 lb. by 1 degree? 
water 
 
 
What happens when pressure on a liquid is increased? 
Boiling point goes up/Saturation temp. goes up 
 
 
What happens when vapor is Superheated? 
Temperature above saturated/it gains sensible heat 0.5x1 degree F 
 
 
What causes heat to move from one...
Reta Test 1 Exam With Verified Solutions 
what does temperature indicate 
intensity of heat energy in an object 
 
 
what is required to move heat from one object to another 
temperature difference 
 
 
which of these is required to obtain a valid reading from a pressure temperature chart 
the refrigerant must be in a saturated condition 
 
 
which of these is an essential component of a mechanical refrigeration system 
expansion device 
 
 
what is a function of a compressor in a mechanical r...
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Reta Test 1 Exam With Verified Solutions 
what does temperature indicate 
intensity of heat energy in an object 
 
 
what is required to move heat from one object to another 
temperature difference 
 
 
which of these is required to obtain a valid reading from a pressure temperature chart 
the refrigerant must be in a saturated condition 
 
 
which of these is an essential component of a mechanical refrigeration system 
expansion device 
 
 
what is a function of a compressor in a mechanical r...
RETA CARO Test | 27 Questions with 100% Correct Answers | Verified|Graded A+
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RETA CARO Test | 27 Questions with 100% Correct Answers | Verified|Graded A+
RETA CARO Test | 27 Questions with 100% Correct Answers | Verified
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RETA CARO Test | 27 Questions with 100% Correct Answers | Verified
RETA CARO Exam 2023 Solved Correctly 
 
Which refrigerant has the highest mass flow requirement at the same evaporator and condensing temperature? 
CFC-12 
which refrigerant is the first to be phased out by Montreal Protocol 
CFC-12 
As the ratio between the evaporator and condensing pressure increases 
the theoretical discharge temperature increases 
Under the Montreal Protocol 
as long as a technician does not perform work on the refrigerant containing portions of a system they do not need to ...
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RETA CARO Exam 2023 Solved Correctly 
 
Which refrigerant has the highest mass flow requirement at the same evaporator and condensing temperature? 
CFC-12 
which refrigerant is the first to be phased out by Montreal Protocol 
CFC-12 
As the ratio between the evaporator and condensing pressure increases 
the theoretical discharge temperature increases 
Under the Montreal Protocol 
as long as a technician does not perform work on the refrigerant containing portions of a system they do not need to ...
RETA CARO Exam 2023 Solved Correctly 
 
Which refrigerant has the highest mass flow requirement at the same evaporator and condensing temperature? 
CFC-12 
which refrigerant is the first to be phased out by Montreal Protocol 
CFC-12 
As the ratio between the evaporator and condensing pressure increases 
the theoretical discharge temperature increases 
Under the Montreal Protocol 
as long as a technician does not perform work on the refrigerant containing portions of a system they do not need to ...
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RETA CARO Exam 2023 Solved Correctly 
 
Which refrigerant has the highest mass flow requirement at the same evaporator and condensing temperature? 
CFC-12 
which refrigerant is the first to be phased out by Montreal Protocol 
CFC-12 
As the ratio between the evaporator and condensing pressure increases 
the theoretical discharge temperature increases 
Under the Montreal Protocol 
as long as a technician does not perform work on the refrigerant containing portions of a system they do not need to ...