Refrigeration Practice Test Questions and Correct Answers
Question 1
All of the following are advantages of open compressors except
a. compressor does not need to be replaced if the motor fails
b. easy to change motors
c. easy to change pumping capacity
d. does not need a shaft seal
Correct Answer
does not need a shaft seal
Question 2
Which type of cooling tower fill material design that spreads the water evenly to form thin layers
Correct Answer
film type
Question 3
Which is a disadvantage of a packaged indoor unit
Correct Answer
the potential for excessive noise exists
Page 1 of 16
,Question 4
A change in ______ heat result in a change in temperature but not in the state
Correct Answer
sensible
Question 5
Which is most likely to cause high head pressure
a. low water temperature or ambient air temperature
b. inefficient compressor valves
c. low load condition
d. overcharge
Correct Answer
overcharge (too much refrigerant)
Question 6
Where is a receiver located in a refrigeration system
Correct Answer
after the condenser on the liquid line
Page 2 of 16
, Question 7
Which is most likely to cause low to no subcooling
a. oversized condenser
b. thermostatic expansion valve overfeeding
c. inefficient compressor
d. overcharge
Correct Answer
thermostatic expansion valve overfeeding
Question 8
In a split system, the indoor section typically consist of the evaporator, fan, ________, and a connection for the suction and
liquid lines
Correct Answer
a metering device
Question 9
With regard to cooling towers, which device is necessary for a closed loop system but not for an open loop system
Correct Answer
heat exchanger
Page 3 of 16
Question 1
All of the following are advantages of open compressors except
a. compressor does not need to be replaced if the motor fails
b. easy to change motors
c. easy to change pumping capacity
d. does not need a shaft seal
Correct Answer
does not need a shaft seal
Question 2
Which type of cooling tower fill material design that spreads the water evenly to form thin layers
Correct Answer
film type
Question 3
Which is a disadvantage of a packaged indoor unit
Correct Answer
the potential for excessive noise exists
Page 1 of 16
,Question 4
A change in ______ heat result in a change in temperature but not in the state
Correct Answer
sensible
Question 5
Which is most likely to cause high head pressure
a. low water temperature or ambient air temperature
b. inefficient compressor valves
c. low load condition
d. overcharge
Correct Answer
overcharge (too much refrigerant)
Question 6
Where is a receiver located in a refrigeration system
Correct Answer
after the condenser on the liquid line
Page 2 of 16
, Question 7
Which is most likely to cause low to no subcooling
a. oversized condenser
b. thermostatic expansion valve overfeeding
c. inefficient compressor
d. overcharge
Correct Answer
thermostatic expansion valve overfeeding
Question 8
In a split system, the indoor section typically consist of the evaporator, fan, ________, and a connection for the suction and
liquid lines
Correct Answer
a metering device
Question 9
With regard to cooling towers, which device is necessary for a closed loop system but not for an open loop system
Correct Answer
heat exchanger
Page 3 of 16
