BOMA ACTUAL TEST FULL QUESTIONS
AND CORRECT ANSWERS EXAMPREP
STUDY SHEET
●● The compressor in a refrigeration system
Answer: pumps the refrigerant throughout the system
●● To control ice build - up on a heat pump outdoor coil in the heating
cycle a ______ is used .
Answer: pressure differential switch
●● 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
Answer: Dalton's Law
●● When moisture is present in a refrigeration system , it will react with
the refrigerant and the oil to form_
Answer: acid
●● A direct expansion - type evaporator is also called a
Answer: dry-type evaporator
●● Positive displacement compressors have crankcase heat to
,Answer: prevent refrigerant migration to the compressor
●● If the power element of a TX valve loses its charge the
Answer: refrigerant flow to the coil will stop
●● The pressure in a refrigeration system is changed in the
Answer: compressor and expansion device
●● Where is cooling produced
Answer: In the evaporator
●● Where is heat content the highest
Answer: Entering the compressor
●● Where is heat content decreased the most ?
Answer: The condenser
●● Where is the compressor located
Answer: Between the condenser and evaporator
●● Where does the state of refrigerant change from liquid to a vapor
Answer: The evaporator
,●● What part of the system is pressure the lowest
Answer: The evaporator
●● (T/F) A Compressor raises the pressure and lowers the temperature
of the refrigerant
Answer: False
●● Rotary is what type compressor
Answer: Positive displacement
●● If a thermal expansion valve stays closed what would be the result
Answer: The valve would not be the load and the unit will heat up
●● What type of metering device is used in a centrifugal chiller
Answer: A high side float
●● Which compressor require the least amount of maintenance
Answer: Centrifugal
●● What opens the TXV
Answer: The power element of the assembly
, ●● T/F the purpose of a solenoid valve in a refrigeration system is to
start and stop the refrigerant flow
Answer: True
●● What causes oil to foam
Answer: Refrigerant in the oil
●● What determines the corrosion tendency of oil
Answer: The sulfur content
●● What would cause a compressor to overload
Answer: Starting under a warm evaporator load
●● The evaporator im a refrigeration system
Answer: Absorbs heat from the product to be cooled
●● Moisture reacts with refrigerant and oil to form
Answer: Acid
●● A direct expansion type evaporator is also called a
Answer: Dry type evaporator
AND CORRECT ANSWERS EXAMPREP
STUDY SHEET
●● The compressor in a refrigeration system
Answer: pumps the refrigerant throughout the system
●● To control ice build - up on a heat pump outdoor coil in the heating
cycle a ______ is used .
Answer: pressure differential switch
●● 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
Answer: Dalton's Law
●● When moisture is present in a refrigeration system , it will react with
the refrigerant and the oil to form_
Answer: acid
●● A direct expansion - type evaporator is also called a
Answer: dry-type evaporator
●● Positive displacement compressors have crankcase heat to
,Answer: prevent refrigerant migration to the compressor
●● If the power element of a TX valve loses its charge the
Answer: refrigerant flow to the coil will stop
●● The pressure in a refrigeration system is changed in the
Answer: compressor and expansion device
●● Where is cooling produced
Answer: In the evaporator
●● Where is heat content the highest
Answer: Entering the compressor
●● Where is heat content decreased the most ?
Answer: The condenser
●● Where is the compressor located
Answer: Between the condenser and evaporator
●● Where does the state of refrigerant change from liquid to a vapor
Answer: The evaporator
,●● What part of the system is pressure the lowest
Answer: The evaporator
●● (T/F) A Compressor raises the pressure and lowers the temperature
of the refrigerant
Answer: False
●● Rotary is what type compressor
Answer: Positive displacement
●● If a thermal expansion valve stays closed what would be the result
Answer: The valve would not be the load and the unit will heat up
●● What type of metering device is used in a centrifugal chiller
Answer: A high side float
●● Which compressor require the least amount of maintenance
Answer: Centrifugal
●● What opens the TXV
Answer: The power element of the assembly
, ●● T/F the purpose of a solenoid valve in a refrigeration system is to
start and stop the refrigerant flow
Answer: True
●● What causes oil to foam
Answer: Refrigerant in the oil
●● What determines the corrosion tendency of oil
Answer: The sulfur content
●● What would cause a compressor to overload
Answer: Starting under a warm evaporator load
●● The evaporator im a refrigeration system
Answer: Absorbs heat from the product to be cooled
●● Moisture reacts with refrigerant and oil to form
Answer: Acid
●● A direct expansion type evaporator is also called a
Answer: Dry type evaporator
