HVAC EXCELLENCE PRACTICE
EXAMINATION 2026 QUESTIONS WITH
ANSWERS GRADED A+
◍ A liquid receiver is used to ________.
Answer: Store liquid refrigerant
◍ If the cut-off plate is removed from a blower assembly, how would this
effect blower performance?.
Answer: It would reduce air flow
◍ A sweating liquid line where it leaves the liquid line filter drier is most
likely the result of _________.
Answer: Debris clogging the filter drier
◍ When testing the efficiency of a water cooled condenser, the refrigerant
condensing temperature should be about __________ higher than the
leaving water temperature.
Answer: 10 degrees F
◍ In an air conditioning system that uses a TXV, the temperature of the
evaporator outlet will usually be ________.
Answer: Warmer than the evaporator inlet
◍ A low refrigerant charge in an air conditioning system will cause what
symptoms?.
Answer: Low suction pressure and low discharge pressure
◍ A TEV sensing bulb which becomes detached from the suction line will
cause these symptoms.
Answer: High suction pressure and higher than normal discharge pressure
◍ An air conditioning system that is oversized can cause _____________.
, Answer: inefficient dehumidification of the conditioned space
◍ A TXV is designed to maintain _________.
Answer: A constant evaporator superheat
◍ True or false: High head pressure is a symptom of a hermetic system that is
low on refrigerant.
Answer: False
◍ to minimize flash gas, subcool the refrigerant entering the metering device
____________.
Answer: Closer to the evaporator temperature
◍ When testing the efficiency of a water cooled condenser, the refrigerant
condensing temperature should be approximately ________ higher than the
leaving water temperature.
Answer: 10 degrees F
◍ A sight glass would normally be located.
Answer: In the liquid line, before the metering device
◍ Why must refrigerant in the suction line be slightly warmer than the
saturation temperature?.
Answer: Prevent liquid slugging of the compressor
◍ When testing the efficiency of an air cooled condenser, the refrigerant
condensing temperature should be no more than ______ higher than the
entering air temperature.
Answer: 30°F
◍ A TEV sensing bulb which becomes detached from the suction line will
cause these symptoms.
Answer: high suction pressure and higher than normal discharge pressure
◍ in order to remove as much moisture as possible from a system __________.
Answer: Triple evacuate the system to 500 microns with a deep vacuum
pump
◍ Fan airflow pressures are usually measured in ____________.
EXAMINATION 2026 QUESTIONS WITH
ANSWERS GRADED A+
◍ A liquid receiver is used to ________.
Answer: Store liquid refrigerant
◍ If the cut-off plate is removed from a blower assembly, how would this
effect blower performance?.
Answer: It would reduce air flow
◍ A sweating liquid line where it leaves the liquid line filter drier is most
likely the result of _________.
Answer: Debris clogging the filter drier
◍ When testing the efficiency of a water cooled condenser, the refrigerant
condensing temperature should be about __________ higher than the
leaving water temperature.
Answer: 10 degrees F
◍ In an air conditioning system that uses a TXV, the temperature of the
evaporator outlet will usually be ________.
Answer: Warmer than the evaporator inlet
◍ A low refrigerant charge in an air conditioning system will cause what
symptoms?.
Answer: Low suction pressure and low discharge pressure
◍ A TEV sensing bulb which becomes detached from the suction line will
cause these symptoms.
Answer: High suction pressure and higher than normal discharge pressure
◍ An air conditioning system that is oversized can cause _____________.
, Answer: inefficient dehumidification of the conditioned space
◍ A TXV is designed to maintain _________.
Answer: A constant evaporator superheat
◍ True or false: High head pressure is a symptom of a hermetic system that is
low on refrigerant.
Answer: False
◍ to minimize flash gas, subcool the refrigerant entering the metering device
____________.
Answer: Closer to the evaporator temperature
◍ When testing the efficiency of a water cooled condenser, the refrigerant
condensing temperature should be approximately ________ higher than the
leaving water temperature.
Answer: 10 degrees F
◍ A sight glass would normally be located.
Answer: In the liquid line, before the metering device
◍ Why must refrigerant in the suction line be slightly warmer than the
saturation temperature?.
Answer: Prevent liquid slugging of the compressor
◍ When testing the efficiency of an air cooled condenser, the refrigerant
condensing temperature should be no more than ______ higher than the
entering air temperature.
Answer: 30°F
◍ A TEV sensing bulb which becomes detached from the suction line will
cause these symptoms.
Answer: high suction pressure and higher than normal discharge pressure
◍ in order to remove as much moisture as possible from a system __________.
Answer: Triple evacuate the system to 500 microns with a deep vacuum
pump
◍ Fan airflow pressures are usually measured in ____________.
