Refrigeration Systems and Refrigerants
ACTUAL QUESTIONS AND CORRECT
ANSWERS
Ammonia - CORRECT ANSWERS✅✅The refrigerant having the highest critical
temperature.
Freon - CORRECT ANSWERS✅✅Registered trademark of E.I. du Pont de Nemours & Co.
Monochlordifluormethane - CORRECT ANSWERS✅✅Commercially known as R-22.
R-502 - CORRECT ANSWERS✅✅Code name of ammonia as refrigerant.
R-12 - CORRECT ANSWERS✅✅Refrigerant used in ice plant refrigeration.
R-22 - CORRECT ANSWERS✅✅Secondary refrigerant used in milk chilling plants.
CFC - CORRECT ANSWERS✅✅Refrigerants that cause ozone-layer depletion.
HFC - CORRECT ANSWERS✅✅Refrigerants that cause little or no ozone destruction.
HCF-125 - CORRECT ANSWERS✅✅Non-flammable refrigerant.
Freon-22 - CORRECT ANSWERS✅✅Odorless refrigerant; its boiling point varies over a
wide range of temperatures.
Freon 11 - CORRECT ANSWERS✅✅Refrigerant with the lowest boiling point.
Liquid - CORRECT ANSWERS✅✅State of refrigerant before the expansion valve in the
condenser coil.
, One ton of refrigeration - CORRECT ANSWERS✅✅Equivalent to 33,500 Btu/hr.
Coefficient of performance (COP) - CORRECT ANSWERS✅✅Rated cooling capacity in
Btu per hour divided by the electrical power in watts.
Sulfur sticks - CORRECT ANSWERS✅✅Used in refrigerant leak detection; burning in the
presence of ammonia releases dense smoke.
Dry ice - CORRECT ANSWERS✅✅Solidified form of carbon dioxide.
Brine - CORRECT ANSWERS✅✅Secondary refrigerant used in milk chilling plants.
Glycol - CORRECT ANSWERS✅✅Secondary refrigerant used in milk chilling plants.
Carbon Dioxide - CORRECT ANSWERS✅✅Refrigerant having a high critical temperature.
Evaporator - CORRECT ANSWERS✅✅Cooling is accomplished in a refrigeration system
due to transfer via evaporation.
Compressor - CORRECT ANSWERS✅✅Component with the highest pressure drops in
refrigeration cycle.
Expansion valve - CORRECT ANSWERS✅✅Component where the refrigerant state
changes before entering the evaporator.
Refrigerating effect - CORRECT ANSWERS✅✅The cooling effect produced by a
refrigeration system.
Coefficient of performance - CORRECT ANSWERS✅✅A measure of the efficiency of a
refrigeration system, defined as the ratio of useful cooling provided to the work input.
ACTUAL QUESTIONS AND CORRECT
ANSWERS
Ammonia - CORRECT ANSWERS✅✅The refrigerant having the highest critical
temperature.
Freon - CORRECT ANSWERS✅✅Registered trademark of E.I. du Pont de Nemours & Co.
Monochlordifluormethane - CORRECT ANSWERS✅✅Commercially known as R-22.
R-502 - CORRECT ANSWERS✅✅Code name of ammonia as refrigerant.
R-12 - CORRECT ANSWERS✅✅Refrigerant used in ice plant refrigeration.
R-22 - CORRECT ANSWERS✅✅Secondary refrigerant used in milk chilling plants.
CFC - CORRECT ANSWERS✅✅Refrigerants that cause ozone-layer depletion.
HFC - CORRECT ANSWERS✅✅Refrigerants that cause little or no ozone destruction.
HCF-125 - CORRECT ANSWERS✅✅Non-flammable refrigerant.
Freon-22 - CORRECT ANSWERS✅✅Odorless refrigerant; its boiling point varies over a
wide range of temperatures.
Freon 11 - CORRECT ANSWERS✅✅Refrigerant with the lowest boiling point.
Liquid - CORRECT ANSWERS✅✅State of refrigerant before the expansion valve in the
condenser coil.
, One ton of refrigeration - CORRECT ANSWERS✅✅Equivalent to 33,500 Btu/hr.
Coefficient of performance (COP) - CORRECT ANSWERS✅✅Rated cooling capacity in
Btu per hour divided by the electrical power in watts.
Sulfur sticks - CORRECT ANSWERS✅✅Used in refrigerant leak detection; burning in the
presence of ammonia releases dense smoke.
Dry ice - CORRECT ANSWERS✅✅Solidified form of carbon dioxide.
Brine - CORRECT ANSWERS✅✅Secondary refrigerant used in milk chilling plants.
Glycol - CORRECT ANSWERS✅✅Secondary refrigerant used in milk chilling plants.
Carbon Dioxide - CORRECT ANSWERS✅✅Refrigerant having a high critical temperature.
Evaporator - CORRECT ANSWERS✅✅Cooling is accomplished in a refrigeration system
due to transfer via evaporation.
Compressor - CORRECT ANSWERS✅✅Component with the highest pressure drops in
refrigeration cycle.
Expansion valve - CORRECT ANSWERS✅✅Component where the refrigerant state
changes before entering the evaporator.
Refrigerating effect - CORRECT ANSWERS✅✅The cooling effect produced by a
refrigeration system.
Coefficient of performance - CORRECT ANSWERS✅✅A measure of the efficiency of a
refrigeration system, defined as the ratio of useful cooling provided to the work input.
