Hvac Employment Readiness Exam
Questions With Correct Answers
When does refrigerant give up heat? When it condenses
Refrigerant in the suction line may be what? Slightly warmer than the saturation
temperature to prevent liquid slugging of the compressor.
The state of refrigerant in the suction line? Low pressure, low temperature vapor.
The state of the refrigerant entering the condenser? High pressure, high superheated
vapor.
What does the evaporator do? Transfers heat from the refrigerated space into the
refrigerant.
The Thermodynamic property's of refrigerant are? Critical point, saturation point and
enthalpy.
Steps of vapor compression process Compression, Condensation, expansion and
vaporization.
What are Fan airflow pressures measured in? Inches of water column. WC
, Zero P S I A Pounds per square inch absolute.
Zero P S I G Pounds per square inch Gauge
What is Dew point? The temperature at which condensation begins
What does a compound pressure gauge measure? Pressure and Vacuum
Liquid Slugging is? Liquid refrigerant in the compressor clearance space.
What has an effect on reciprocating compressor capacity? Clearance Space.
Most efficient Compressor? Scroll compressor
Condenser order of functions? De-superheats, Condenses and Subcools
What is Subcooling? Cooling of a liquid below its condensing temperature.
Three types of Condensers? Air cooled, water cooled and evaporative cooled
Questions With Correct Answers
When does refrigerant give up heat? When it condenses
Refrigerant in the suction line may be what? Slightly warmer than the saturation
temperature to prevent liquid slugging of the compressor.
The state of refrigerant in the suction line? Low pressure, low temperature vapor.
The state of the refrigerant entering the condenser? High pressure, high superheated
vapor.
What does the evaporator do? Transfers heat from the refrigerated space into the
refrigerant.
The Thermodynamic property's of refrigerant are? Critical point, saturation point and
enthalpy.
Steps of vapor compression process Compression, Condensation, expansion and
vaporization.
What are Fan airflow pressures measured in? Inches of water column. WC
, Zero P S I A Pounds per square inch absolute.
Zero P S I G Pounds per square inch Gauge
What is Dew point? The temperature at which condensation begins
What does a compound pressure gauge measure? Pressure and Vacuum
Liquid Slugging is? Liquid refrigerant in the compressor clearance space.
What has an effect on reciprocating compressor capacity? Clearance Space.
Most efficient Compressor? Scroll compressor
Condenser order of functions? De-superheats, Condenses and Subcools
What is Subcooling? Cooling of a liquid below its condensing temperature.
Three types of Condensers? Air cooled, water cooled and evaporative cooled
