DX Rack Refrigeration Boot Camp HVAC-R Pre-Assessment

Front

What is the definition of subcooling?

Back

Cooling of liquid refrigerant below its condensing temperature.

Front

Define Superheat:

Back

Temperature of vapor above boiling temperature of its liquid at that pressure.

Front

A liquid line filter drier is installed in the low side of the system.

Back

False

Front

A valuable tool that service technicians use to quickly look up the pressure and corresponding temperature of refrigerant.

Back

Pressure Temperature Chart

Front

Define Saturated Suction Temperature (SST):

Back

Temperature at which the refrigerant changes from a liquid state to a vapor.

Front

What component in a refrigeration system do you adjust to set the superheat? Options: Compressor, Condenser, Evaporator, Thermostatic Expansion Valve, I'm not sure

Back

Thermostatic Expansion Valve

Front

Where do you measure superheat?

Back

Leaving the evaporator

Front

Where do you measure subcooling?

Back

Leaving the condenser

Front

Using this pressure temperature chart, calculate the superheat for this evaporator. Suction line temperature is 12﮿ F and suction pressure is 26 PSIG.

Back

8° superheat

Front

Using this pressure temperature chart what is the saturated suction temperature of an evaporator coil measuring a suction pressure of 29.7 PSIG?

Back

8°