HVAC BOMA 501 Exam 2026 | Complete Questions
and Correct Answers | Graded A+ | Newest
Version | Brand New Version
If the resistance against a centrifugal blower is doubled, the cfm output
decreases, and the amperage draw of the motor ___.
a. decreases slightly
b. increases slightly
c. stays the same
d. overheats the motor ---------CORRECT ANSWER-----------------a. decreases slightly
If the suction pressure of a system is 60 psig and the oil pump outlet is 85 psig,
what is the net oil pressure?
a. 60 psig
b. 25 psig
c. 85 psig
d. 145 psig ---------CORRECT ANSWER-----------------b. 25 psig
Noncodensable gases ___.
,a. are desirable in a refrigeration system
b. are undesirable in a refrigeration system
c. condense readily under normal atmospheric conditions
d. help in pulling a vaccum ---------CORRECT ANSWER-----------------b. are
undesirable in a refrigeration system
If a high temperature evaporator is forming ice, which of the following is a
possible problem?
a. evaporator fan not running
b. compressor not running
c. condenser fan not running
d. no problem, ice formation normal ---------CORRECT ANSWER-----------------a.
evaporator fan not running
The evaporator in a refrigeration system ___.
a. reduces the boiling point of the refrigerant
b. condenses the refrigerant
c. absorbs heat from the product to be cooled
d. compresses the refrigerant vapor ---------CORRECT ANSWER-----------------c.
absorbs heat from the product to be cooled
,An example of a power consuming device would be a ____ while an example of a
non-power consuming device would be a ___.
a. single-pole single-throw switch, light bulb
b. light bulb, electric motor
c. electric motor, light bulb
d. light bulb, single-pole single-throw switch ---------CORRECT ANSWER----------------
-d. light bulb, single-pole single-throw switch
A liquid material exerts a pressure or force ____.
a. in all directions
b. downward only
c. outward and downward
d. outward only ---------CORRECT ANSWER-----------------c. outward and downward
When moisture is present in a refrigeration system, it will react with the
refrigerant and the oil to form ___.
a. carbon dioxide
b. acid
c. carbon monoxide
d. all of the above ---------CORRECT ANSWER-----------------b. acid
, A direct expansion-type evaporator is also called a ___.
a. flooded evaporator
b. dry-type evaporator
c. multi-circiut evaporator
d. stamped evaporator ---------CORRECT ANSWER-----------------b. dry-type
evaporator
The generalized comfort chart can be used as a basis to ____.
a. determine combinations of temperature and humidity to produce comfort in
summer and winter
b. study air and its properties
c. determine the amount of fresh air make up necessary for comfort
d. none of the above ---------CORRECT ANSWER-----------------a. determine
combinations of temperature and humidity to produce comfort in summer and
winter
The condenser ____.
a. rejects the heat from the refrigerant
b. controls the refrigerant flow throughout the system
and Correct Answers | Graded A+ | Newest
Version | Brand New Version
If the resistance against a centrifugal blower is doubled, the cfm output
decreases, and the amperage draw of the motor ___.
a. decreases slightly
b. increases slightly
c. stays the same
d. overheats the motor ---------CORRECT ANSWER-----------------a. decreases slightly
If the suction pressure of a system is 60 psig and the oil pump outlet is 85 psig,
what is the net oil pressure?
a. 60 psig
b. 25 psig
c. 85 psig
d. 145 psig ---------CORRECT ANSWER-----------------b. 25 psig
Noncodensable gases ___.
,a. are desirable in a refrigeration system
b. are undesirable in a refrigeration system
c. condense readily under normal atmospheric conditions
d. help in pulling a vaccum ---------CORRECT ANSWER-----------------b. are
undesirable in a refrigeration system
If a high temperature evaporator is forming ice, which of the following is a
possible problem?
a. evaporator fan not running
b. compressor not running
c. condenser fan not running
d. no problem, ice formation normal ---------CORRECT ANSWER-----------------a.
evaporator fan not running
The evaporator in a refrigeration system ___.
a. reduces the boiling point of the refrigerant
b. condenses the refrigerant
c. absorbs heat from the product to be cooled
d. compresses the refrigerant vapor ---------CORRECT ANSWER-----------------c.
absorbs heat from the product to be cooled
,An example of a power consuming device would be a ____ while an example of a
non-power consuming device would be a ___.
a. single-pole single-throw switch, light bulb
b. light bulb, electric motor
c. electric motor, light bulb
d. light bulb, single-pole single-throw switch ---------CORRECT ANSWER----------------
-d. light bulb, single-pole single-throw switch
A liquid material exerts a pressure or force ____.
a. in all directions
b. downward only
c. outward and downward
d. outward only ---------CORRECT ANSWER-----------------c. outward and downward
When moisture is present in a refrigeration system, it will react with the
refrigerant and the oil to form ___.
a. carbon dioxide
b. acid
c. carbon monoxide
d. all of the above ---------CORRECT ANSWER-----------------b. acid
, A direct expansion-type evaporator is also called a ___.
a. flooded evaporator
b. dry-type evaporator
c. multi-circiut evaporator
d. stamped evaporator ---------CORRECT ANSWER-----------------b. dry-type
evaporator
The generalized comfort chart can be used as a basis to ____.
a. determine combinations of temperature and humidity to produce comfort in
summer and winter
b. study air and its properties
c. determine the amount of fresh air make up necessary for comfort
d. none of the above ---------CORRECT ANSWER-----------------a. determine
combinations of temperature and humidity to produce comfort in summer and
winter
The condenser ____.
a. rejects the heat from the refrigerant
b. controls the refrigerant flow throughout the system
