Name: 
 

Chapter 2



True/False
Indicate whether the sentence or statement is true or false.
 

 1. 

It is possible for a refrigerant to absorb heat at a low temperature and reject heat at a higher temperature.
 

 2. 

An evaporator can also dehumidify the air in a building.
 

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 3. 

Which component in a refrigeration system performs the actual cooling or refrigeration?
a.
compressor
c.
condenser
b.
evaporator
d.
metering device
 

 4. 

Which component in a refrigeration system rejects the heat from the system?
a.
compressor
c.
condenser
b.
evaporator
d.
metering device
 

 5. 

Which component in a refrigeration system is responsible for raising the pressure and temperature of the vapor refrigerant that leaves the evaporator?
a.
compressor
c.
condenser
b.
evaporator
d.
metering device
 

 6. 

Which refrigerant is the most commonly used in residential air conditioning systems at the present time?
a.
R22
c.
R410A
b.
R12
d.
R134A
 

 7. 

Which refrigerant used in residential air conditioning has an operating pressure about 50% higher than R22?
a.
R22
c.
R-134a
b.
R410a
d.
R-12
 

 8. 

In what condition does the refrigerant enter the condenser?
a.
high pressure vapor
c.
low pressure liquid
b.
low pressure vapor
d.
high pressure liquid
 

Short Answer
 

 9. 

Using a pressure temperature chart, record the following information:

R22 with a saturation temperature of 115 degrees F would have a pressure of _____ psig.
R404A with a saturation temperature of 10 degrees F would have a pressure of _____ psig.
R134A with a pressure of 25 psig would have a saturation temperature of _____ degrees F.
R22 with a pressure of 225 psig would have a saturation temperature of _____ degrees F.
 

 10. 

List four types of metering devices used in refrigeration systems.
 



 
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