Commercial Refrigeration FINAL TEST Questions & Answers(RATED A)

How is the cooling effect in a mechanical refrigeration system produced? - ANSWER Evaporation of liquid refrigerant into vapor What is the primary purpose of a compressor? - ANSWER It circulates and pressurizes the refrigerant vapor before the vapor Is condensed for re use Name another function that must be performed by the compressor - ANSWER Is raise the pressure and temperature of the refrigerant vapor. This allows the refrigerant to condense into a liquid as it circulates through the condenser What characteristic defines an "open" type compressor? - ANSWER Has a drive shaft protruding from the compressor What are the two main disadvantages of a hermetic compressor? - ANSWER If either the motor or compressor malfunctions, the entire unit must be replaced. The motor is actually a part of the refrigerant circulation system. This means that a burnout can contaminate the entire system