1
Boma hvac Questions and Correct
Detailed Answers (Verified Answers)
Q: What happens when room temperature soda is poured into a
glass of ice ?
Ans: The ice melts because it is absorbing heat from the soda .
Q: The compressor in a refrigeration system
Ans: pumps the refrigerant throughout the system
Q: To control ice build - up on a heat pump outdoor coil in the
heating cycle a ______ is used .
Ans: pressure differential switch
Q: The total pressure of a confined mixture of gases is the sum
of the pressures of each of the gases in the mixture . This is known
as
Master01 | 2025/2026 | Latest update
, 2
Ans: Dalton's Law
Q: When moisture is present in a refrigeration system , it will
react with the refrigerant and the oil to form_
Ans: acid
Q: A direct expansion - type evaporator is also called a
Ans: dry-type evaporator
Q: Positive displacement compressors have crankcase heat to
Ans: prevent refrigerant migration to the compressor
Q: If the power element of a TX valve loses its charge the
Ans: refrigerant flow to the coil will stop
Q: The pressure in a refrigeration system is changed in the
Ans: compressor and expansion device
Q: Where is cooling produced
Master01 | 2025/2026 | Latest update
, 3
Ans: In the evaporator
Q: Where is heat content the highest
Ans: Entering the compressor
Q: Where is heat content decreased the most ?
Ans: The condenser
Q: Where is the compressor located
Ans: Between the condenser and evaporator
Q: Where does the state of refrigerant change from liquid to a
vapor
Ans: The evaporator
Q: What part of the system is pressure the lowest
Ans: The evaporator
Master01 | 2025/2026 | Latest update
, 4
Q: (T/F) A Compressor raises the pressure and lowers the
temperature of the refrigerant
Ans: False
Q: Rotary is what type compressor
Ans: Positive displacement
Q: If a thermal expansion valve stays closed what would be the
result
Ans: The valve would not be the load and the unit will heat up
Q: What type of metering device is used in a centrifugal chiller
Ans: A high side float
Q: Which compressor require the least amount of maintenance
Ans: Centrifugal
Q: What opens the TXV
Master01 | 2025/2026 | Latest update
Boma hvac Questions and Correct
Detailed Answers (Verified Answers)
Q: What happens when room temperature soda is poured into a
glass of ice ?
Ans: The ice melts because it is absorbing heat from the soda .
Q: The compressor in a refrigeration system
Ans: pumps the refrigerant throughout the system
Q: To control ice build - up on a heat pump outdoor coil in the
heating cycle a ______ is used .
Ans: pressure differential switch
Q: The total pressure of a confined mixture of gases is the sum
of the pressures of each of the gases in the mixture . This is known
as
Master01 | 2025/2026 | Latest update
, 2
Ans: Dalton's Law
Q: When moisture is present in a refrigeration system , it will
react with the refrigerant and the oil to form_
Ans: acid
Q: A direct expansion - type evaporator is also called a
Ans: dry-type evaporator
Q: Positive displacement compressors have crankcase heat to
Ans: prevent refrigerant migration to the compressor
Q: If the power element of a TX valve loses its charge the
Ans: refrigerant flow to the coil will stop
Q: The pressure in a refrigeration system is changed in the
Ans: compressor and expansion device
Q: Where is cooling produced
Master01 | 2025/2026 | Latest update
, 3
Ans: In the evaporator
Q: Where is heat content the highest
Ans: Entering the compressor
Q: Where is heat content decreased the most ?
Ans: The condenser
Q: Where is the compressor located
Ans: Between the condenser and evaporator
Q: Where does the state of refrigerant change from liquid to a
vapor
Ans: The evaporator
Q: What part of the system is pressure the lowest
Ans: The evaporator
Master01 | 2025/2026 | Latest update
, 4
Q: (T/F) A Compressor raises the pressure and lowers the
temperature of the refrigerant
Ans: False
Q: Rotary is what type compressor
Ans: Positive displacement
Q: If a thermal expansion valve stays closed what would be the
result
Ans: The valve would not be the load and the unit will heat up
Q: What type of metering device is used in a centrifugal chiller
Ans: A high side float
Q: Which compressor require the least amount of maintenance
Ans: Centrifugal
Q: What opens the TXV
Master01 | 2025/2026 | Latest update
