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13.

In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to                        
A. collect liquid refrigerant and prevent it from going to compressor B. detect liquid in vapour
C. superheat the vapour D. collect vapours



14.

In a refrigeration cycle, the flow of refrigerant is controlled by                        
A. compressor B. condenser
C. evaporator D. expansion valve



15.

In vapour compression refrigeration system, refrigerant occurs as liquid between                        
A. condenser and expansion valve B. compressor and evaporator
C. expansion valve and evaporator D. compressor and condenser




16.

Mass flow ratio of NH3 in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of                        
A. 1 : 1 B. 1 : 9
C. 9 : 1 D. 1 : 3



17.

Moisture in freon refrigeration system causes                        
A. ineffective refrigeration B. high power consumption
C. freezing automatic regulating valve D. corrosion of whole system



18.

Most of the domestic refrigerators work on the following refrigeration system                        
A. vapour compression B. vapour absorption
C. carnot cycle D. electrolux refrigerator



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