ESCO HVAC FINAL Excellence Exam Questions and Answers With Verified
Solutions 2025
a liquid to suction heat exchanger is often used to - ✔✔increase liquid subcooling
the term refrigerant conditions refer to which of the following - ✔✔saturated, superheat, or subcooling
refrigerant
the component in the refrigeration system used to catch and prevent liquid from entering the
compressor is called - ✔✔the accumulator
an air conditioning system or heat pump must have - ✔✔400-450 CUBIC FEET OF AIR PER MIN ACROSS
THE EVAPORATOR COIL.
the refrigerant charge in a txv remote bulb or power element must - ✔✔have similar characteristics to
the refrigerant in the system
the remote bulb of a txv should be fastened to the - ✔✔outlet of the ecaporator
which of the following is true, of a solenoid valve in a pump down system - ✔✔it is located before the
metering device
the evaporator temperature on an air conditioning system should be - ✔✔40 - 50 degrees F
the second-best way to charge a capillary tube system is - ✔✔use the superheat charging table or curve
a partially clogged capillary tube can cause - ✔✔a starved evaporator
the purpose of the liquid pressure amplification is to - ✔✔help prevent flashing and increase subcooling
, the pressure at which the refrigerant changes state, from a vapor to a liquid is the - ✔✔condensing
pressure
the basic components of a refrigeration system are - ✔✔compressor, discharge line, receiver, metering
device, evaporator, and suction line
a pressure gauge place anywhere from the metering device to the compressor will - ✔✔the low side or
evaporating pressure
the factory superheat settings for txvs used with central air conditioning systems should be - ✔✔about
10 degrees
superheat suppression is the pressure( produces' ) of - ✔✔injecting liquid refrigerant into the discharge
line
in the evaporator - ✔✔Heat is transferred from the refrigerated space to the refrigerant.
the greatest need for subcooling the refrigerant is to - ✔✔prevent liquid line flash, thus making the
system much more efficient
always change a txv/receiver/sight glass system under a - ✔✔high load condition
an automatic expansion valve is bet suited - ✔✔when the system load remains fairly constant
in the first few passes of the condenser - ✔✔the refrigerant should be de-superheated
a tx sensing bulb which detached from the suction line will cause these symptoms - ✔✔high suction
pressure and lower than normal discharge pressure
an overcharge of refrigerant will result in - ✔✔elevated head and suction pressure
Solutions 2025
a liquid to suction heat exchanger is often used to - ✔✔increase liquid subcooling
the term refrigerant conditions refer to which of the following - ✔✔saturated, superheat, or subcooling
refrigerant
the component in the refrigeration system used to catch and prevent liquid from entering the
compressor is called - ✔✔the accumulator
an air conditioning system or heat pump must have - ✔✔400-450 CUBIC FEET OF AIR PER MIN ACROSS
THE EVAPORATOR COIL.
the refrigerant charge in a txv remote bulb or power element must - ✔✔have similar characteristics to
the refrigerant in the system
the remote bulb of a txv should be fastened to the - ✔✔outlet of the ecaporator
which of the following is true, of a solenoid valve in a pump down system - ✔✔it is located before the
metering device
the evaporator temperature on an air conditioning system should be - ✔✔40 - 50 degrees F
the second-best way to charge a capillary tube system is - ✔✔use the superheat charging table or curve
a partially clogged capillary tube can cause - ✔✔a starved evaporator
the purpose of the liquid pressure amplification is to - ✔✔help prevent flashing and increase subcooling
, the pressure at which the refrigerant changes state, from a vapor to a liquid is the - ✔✔condensing
pressure
the basic components of a refrigeration system are - ✔✔compressor, discharge line, receiver, metering
device, evaporator, and suction line
a pressure gauge place anywhere from the metering device to the compressor will - ✔✔the low side or
evaporating pressure
the factory superheat settings for txvs used with central air conditioning systems should be - ✔✔about
10 degrees
superheat suppression is the pressure( produces' ) of - ✔✔injecting liquid refrigerant into the discharge
line
in the evaporator - ✔✔Heat is transferred from the refrigerated space to the refrigerant.
the greatest need for subcooling the refrigerant is to - ✔✔prevent liquid line flash, thus making the
system much more efficient
always change a txv/receiver/sight glass system under a - ✔✔high load condition
an automatic expansion valve is bet suited - ✔✔when the system load remains fairly constant
in the first few passes of the condenser - ✔✔the refrigerant should be de-superheated
a tx sensing bulb which detached from the suction line will cause these symptoms - ✔✔high suction
pressure and lower than normal discharge pressure
an overcharge of refrigerant will result in - ✔✔elevated head and suction pressure
