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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For obtaining high COP, the pressure range of compressor should be

High
Any value
Low
Optimum

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Refrigeration and Air Conditioning
The capacity of a domestic refrigerator is in the range of

0.1 to 0.3 TR
5 to 7 TR
3 to 5 TR
1 to 3 TR

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Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m²/hK
m/hK
m²/h
m/h

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

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

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Refrigeration and Air Conditioning
The evaporator used in household refrigerators is

Frosting evaporator
None of these
Defrosting evaporator
Non-frosting evaporator

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Refrigeration and Air Conditioning
The thermostatic expansion valve operates on the changes in the

Temperature of the evaporator
Degree of superheat at exit from the evaporator
None of these
Pressure in the evaporator

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MORE MCQ ON Refrigeration and Air Conditioning

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