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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For better C.O.P of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be

High
Equal
Anything
Small

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Refrigeration and Air Conditioning
Most of the domestic refrigerators work on the following refrigeration system

Electrolux refrigerator
Vapour absorption
Carnot cycle
Vapour compression

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Refrigeration and Air Conditioning
The formation of frost on cooling coils in a refrigerator

Increases power consumption
Increases heat transfer
Reduces power consumption
Improves C.O.P. of the system

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Refrigeration and Air Conditioning
When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by

Operating the machine at higher speeds
Operating the machine at lower speeds
Lowering the higher temperature
Raising the higher temperature

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Refrigeration and Air Conditioning
In vapour compression refrigeration system, refrigerant occurs as liquid between

Compressor and evaporator
Compressor and condenser
Expansion valve and evaporator
Condenser and expansion valve

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Refrigeration and Air Conditioning
The specific humidity during heating and humidification process.

Decreases
None of these
Increases
Remains constant

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MORE MCQ ON Refrigeration and Air Conditioning

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