1|Page
HVAC BOMA 501 EXAM VERSION 1,2 & 3 NEWEST 2025/2026 ACTUAL
EXAM WITH COMPLETE QUESTIONS AND CORRECT DETAILED
ANSWERS (100% VERIFIED ANSWERS) |ALREADY GRADED A+|
||PROFESSOR VERIFIED||
If the compression ratio of a system with a reciprocating
compressor decreases, the amount of refrigerant pumped by the
compressor ____.
a. will increase
b. will decrease
c. will remain the same
d. cannot be determined - ANSWER-a will increase
The approach of a cooling tower is the ____.
a. difference between the entering and leaving wet-bulb
temperatures
b. number of degrees the water is cooled in the tower
c. difference in temperature between the entering air wet-bulb
temperature and the sump water temperature
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d. difference in temperature between the entering air web-bulb
temperature and the water entering the tower - ANSWER-c
difference in temperature between the entering air wet-bulb
temperature and the sump water temperature
The screw-type compressor is used primarily in ____.
a. large industrial refrigeration and air-conditioning systems
b. residential air conditioning
c. small commercial refrigeration units
d. domestic refrigerators - ANSWER-a. large industrial
refrigeration and air-conditioning systems
At what location or locations in a refrigeration system does the
saturation pressure correspond to the saturation temperature?
a. compressor and evaporator
b. evaporator and condenser
c. condenser and expansion device
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d. compressor - ANSWER-b evaporator and condenser
A split-phase motor can use a ____ to energize and de-energize
the start winding.
a. potential relay
b. current relay
c. centrifugal switch
d. all of the above - ANSWER-d. all of the above
Temperature is an indication of the ____.
a. amount of heat in a material
b. density of the material
c. amount of molecular activity in the material
d. weight of the total mass of the material - ANSWER-c. amount
of molecular activity in the material
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The compressor motor and condenser fan motor are wired in
____.
a. parallel
b. series
c. parallel/series
d. with minimum wire length - ANSWER-a. parallel
How many watts of electrical power are equal to 1 horsepower?
a. 33000
b. 15000
c. 746
d. 660 - ANSWER-c. 746
How many Btu's are required to change five pounds of ice at 20°F
to steam at 220°F?
a. 1,304 Btu/h
HVAC BOMA 501 EXAM VERSION 1,2 & 3 NEWEST 2025/2026 ACTUAL
EXAM WITH COMPLETE QUESTIONS AND CORRECT DETAILED
ANSWERS (100% VERIFIED ANSWERS) |ALREADY GRADED A+|
||PROFESSOR VERIFIED||
If the compression ratio of a system with a reciprocating
compressor decreases, the amount of refrigerant pumped by the
compressor ____.
a. will increase
b. will decrease
c. will remain the same
d. cannot be determined - ANSWER-a will increase
The approach of a cooling tower is the ____.
a. difference between the entering and leaving wet-bulb
temperatures
b. number of degrees the water is cooled in the tower
c. difference in temperature between the entering air wet-bulb
temperature and the sump water temperature
,2|Page
d. difference in temperature between the entering air web-bulb
temperature and the water entering the tower - ANSWER-c
difference in temperature between the entering air wet-bulb
temperature and the sump water temperature
The screw-type compressor is used primarily in ____.
a. large industrial refrigeration and air-conditioning systems
b. residential air conditioning
c. small commercial refrigeration units
d. domestic refrigerators - ANSWER-a. large industrial
refrigeration and air-conditioning systems
At what location or locations in a refrigeration system does the
saturation pressure correspond to the saturation temperature?
a. compressor and evaporator
b. evaporator and condenser
c. condenser and expansion device
,3|Page
d. compressor - ANSWER-b evaporator and condenser
A split-phase motor can use a ____ to energize and de-energize
the start winding.
a. potential relay
b. current relay
c. centrifugal switch
d. all of the above - ANSWER-d. all of the above
Temperature is an indication of the ____.
a. amount of heat in a material
b. density of the material
c. amount of molecular activity in the material
d. weight of the total mass of the material - ANSWER-c. amount
of molecular activity in the material
, 4|Page
The compressor motor and condenser fan motor are wired in
____.
a. parallel
b. series
c. parallel/series
d. with minimum wire length - ANSWER-a. parallel
How many watts of electrical power are equal to 1 horsepower?
a. 33000
b. 15000
c. 746
d. 660 - ANSWER-c. 746
How many Btu's are required to change five pounds of ice at 20°F
to steam at 220°F?
a. 1,304 Btu/h
