A. high
B. low
C. optimum
D. any value
E. there is no such criterion
For obtaining high COP, the pressure range of compressor should be_______________? Read More »
Refrigeration and Air Conditioning A. increases COP
B. decreases COP
C. COP remains unaltered
D. other factors decide COP
E. unpredictable
Super heating in a refrigeration cycle __________________? Read More »
Refrigeration and Air Conditioning A. ineffective refrigeration
B. high power consumption
C. freezing automatic regulating valve
D. corrosion of whole system
E. breakdown of refrigerant
Moisture in freon refrigeration system causes________________? Read More »
Refrigeration and Air Conditioning A. halide torch which on detection produces greenish flame lighting
B. sulphur sticks which on detection gives white smoke
C. using reagents
D. smelling
E. sensing reduction in pressure
The leaks in a refrigeration system using Freon are detected by____________________? Read More »
Refrigeration and Air Conditioning A. involves no change in volume
B. takes place at constant temperature
C. takes place at constant entropy
D. takes place at constant enthalpy
E. takes place at constant pressure
A. suction of compressor
B. delivery of compressor
C. high pressure side close to receiver
D. low pressure side near receiver
E. anywhere in the cycle
A. inflammable
D. toxic
C. non-inflammable and toxic
D. non-toxic and inflammable
E. non-toxic and non-inflammable
Freon group of refrigerants are___________________? Read More »
Refrigeration and Air Conditioning A. condensation of the refrigerant vapour
B. evaporation of the refrigerant liquid
C. compression of the refrigerant vapour
D. metering of the refrigerant liquid
E. none of the above
A. compressor
B. condenser
C. evaporator
D. expansion valve
E. all of the above
In a refrigeration cycle, the flow of refrigerant is controlled by___________________? Read More »
Refrigeration and Air Conditioning A. 0.2
B. 1.2
C. 5
D. 6
E. 10
