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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In a domestic vapour compression refrigerator, the refrigerant commonly used is

Ammonia
R-12
CO?
All of these

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Refrigeration and Air Conditioning
The index which correlates the combined effects of air temperature, relative humidity and air velocity on the human body, is known as

Effective temperature
None of the listed here
Mean radiant temperature
Dew point temperature

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Refrigeration and Air Conditioning
The higher temperature in vapour compression cycle occurs at

Evaporator
Receiver
Expansion valve
Compressor discharge

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

High
Small
Anything
Equal

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Refrigeration and Air Conditioning
Which of the following cycles uses air as the refrigerant?

Bell Coleman
Stirling
Carnot
Ericson

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Refrigeration and Air Conditioning
The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy diagram represents

Evaporation of the refrigerant liquid
Metering of the refrigerant liquid
Compression of the refrigerant vapour
Condensation of the refrigerant vapour

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