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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The COP of a domestic refrigerator

Is less than 1
Depends upon the make
Is more than 1
Is equal to 1

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Refrigeration and Air Conditioning
Rating of a domestic refrigerator is of the order of

40 tons
0.1 ton
5 tons
10 tons

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

Evaporator
Compressor discharge
Receiver
Expansion valve

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Refrigeration and Air Conditioning
Short horizontal lines on pressure-enthalpy chart show

Constant pressure lines
Constant temperature lines
Constant entropy lines
Constant total heat lines

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

Low
Any value
Optimum
High

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Refrigeration and Air Conditioning
The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute temperature, and T₂ = Highest absolute temperature)

T₁ / (T₂ - T₁)
(T₂ - T₁)/T₁
T₂/ (T₂ - T₁)
(T₁ - T₂)/T₁

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MORE MCQ ON Refrigeration and Air Conditioning

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