Tamu Cosc 325 exam 2 Houston (Latest
Update ) Questions & Answers
{Grade A} 100% Correct
Infrared radiant heater - correct answer heats by radiation only. Heat source such as
gas flame, resistance heating elements, or hot water coil that heats a surface to a
temperature high enough to radiate energy
Boiler: - correct answer pressure vessel that safely & efficiently transfers heat to
water
· Pressure vessel: tank or container that operates at a greater that atmospheric
pressure
Condensate Return - correct answer steam boiler accessory that collects condensate
return from heating units
,Terminal Devices - correct answer heating system component that transfers heat from
the hot water in a hydronic heating system to the air in building spaces
Centrifugal Pump - correct answer pump that has a rotating impeller inside a cast iron
or steel housing
Programmable Thermostat - correct answer stand-alone thermostat that can be
programmed by the building occupantsstand-alone thermostat that can be
programmed by the building occupants
Refrigerant - correct answer process of moving heat from an area where it is
undesirable to an area where the heat is not objectional
, Compressor - correct answer mechanical device that compresses refrigerant or other
fluid
· Increases temperature/pressure of refrigerant vapor and produces the high pressure
side f the system
Expansion Device definition & types - correct answer valve or mechanical device that
reduces the pressure on a liquid refrigerant by allowing the refrigerant to expand
TXV (Thermostatic Expansion Valve): - correct answer senses the temperature of the
refrigerant discharge from the evaporator and controls the liquid refrigerant flowing
into the evaporator:
EXV (Electronic Expansion Valve): - correct answer · metering devices are becoming
more popular in large chillers
Update ) Questions & Answers
{Grade A} 100% Correct
Infrared radiant heater - correct answer heats by radiation only. Heat source such as
gas flame, resistance heating elements, or hot water coil that heats a surface to a
temperature high enough to radiate energy
Boiler: - correct answer pressure vessel that safely & efficiently transfers heat to
water
· Pressure vessel: tank or container that operates at a greater that atmospheric
pressure
Condensate Return - correct answer steam boiler accessory that collects condensate
return from heating units
,Terminal Devices - correct answer heating system component that transfers heat from
the hot water in a hydronic heating system to the air in building spaces
Centrifugal Pump - correct answer pump that has a rotating impeller inside a cast iron
or steel housing
Programmable Thermostat - correct answer stand-alone thermostat that can be
programmed by the building occupantsstand-alone thermostat that can be
programmed by the building occupants
Refrigerant - correct answer process of moving heat from an area where it is
undesirable to an area where the heat is not objectional
, Compressor - correct answer mechanical device that compresses refrigerant or other
fluid
· Increases temperature/pressure of refrigerant vapor and produces the high pressure
side f the system
Expansion Device definition & types - correct answer valve or mechanical device that
reduces the pressure on a liquid refrigerant by allowing the refrigerant to expand
TXV (Thermostatic Expansion Valve): - correct answer senses the temperature of the
refrigerant discharge from the evaporator and controls the liquid refrigerant flowing
into the evaporator:
EXV (Electronic Expansion Valve): - correct answer · metering devices are becoming
more popular in large chillers
