1|Page
HVAC BOMA 501 EXAM VERSION 1,2 & 3 LATEST 2026-2027 ACTUAL
EXAM WITH COMPLETE QUESTIONS AND CORRECT DETAILED
ANSWERS (100% VERIFIED ANSWERS) |ALREADY GRADED A+|
||PROFESSOR VERIFIED|| ||BRANDNEW!!!||
The volume of gas varies inversely with the absolute pressure,
provided the temperature remains constant.
This is called ____.
a. Charles' Law
b. Tom's Law
c. Boyle's Law
d. Dalton's Law - ANSWER-c Boyle's Law
A control can be which of the following?
a. electrical
b. mechanical
c. electrical and mechanical
d. all of the above - ANSWER-d. all of the above
,2|Page
The purpose of an externally equalized thermostatic expansion
valve is to ____.
a. compensate for excessive evaporator pressure drop
b. allow system to equalize faster
c. prevent the expansion valve from frosting up
d. allow refrigerant to expand in the compressor - ANSWER-a.
compensate for excessive evaporator pressure drop
The pressure in a duct system is measured in:
a. psig
b. psia
c. " Hg
d. " WC - ANSWER-d " WC
,3|Page
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
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
, 4|Page
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
d. compressor - ANSWER-b evaporator and condenser
A split-phase motor can use a ____ to energize and de-energize
the start winding.
HVAC BOMA 501 EXAM VERSION 1,2 & 3 LATEST 2026-2027 ACTUAL
EXAM WITH COMPLETE QUESTIONS AND CORRECT DETAILED
ANSWERS (100% VERIFIED ANSWERS) |ALREADY GRADED A+|
||PROFESSOR VERIFIED|| ||BRANDNEW!!!||
The volume of gas varies inversely with the absolute pressure,
provided the temperature remains constant.
This is called ____.
a. Charles' Law
b. Tom's Law
c. Boyle's Law
d. Dalton's Law - ANSWER-c Boyle's Law
A control can be which of the following?
a. electrical
b. mechanical
c. electrical and mechanical
d. all of the above - ANSWER-d. all of the above
,2|Page
The purpose of an externally equalized thermostatic expansion
valve is to ____.
a. compensate for excessive evaporator pressure drop
b. allow system to equalize faster
c. prevent the expansion valve from frosting up
d. allow refrigerant to expand in the compressor - ANSWER-a.
compensate for excessive evaporator pressure drop
The pressure in a duct system is measured in:
a. psig
b. psia
c. " Hg
d. " WC - ANSWER-d " WC
,3|Page
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
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
, 4|Page
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
d. compressor - ANSWER-b evaporator and condenser
A split-phase motor can use a ____ to energize and de-energize
the start winding.
