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Refrigeration and Air Conditioning

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

Low
High
Any value
Optimum

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Refrigeration and Air Conditioning
The operating temperature of a cold storage is -2°C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is

18.6 kW
1.86 kW
3.72 kW
7.44 kW

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Refrigeration and Air Conditioning
The coefficient of performance of a domestic refrigerator is ________ as compared to a domestic air-conditioner.

Same
More
None of these
Less

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Refrigeration and Air Conditioning
The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and

R-12
Sulphur dioxide
Carbon dioxide
Lithium bromide

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Refrigeration and Air Conditioning
Absorption system normally uses the following refrigerant

Freon-11
CO2
Freon-22
Ammonia

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Refrigeration and Air Conditioning
Condensing temperature in a refrigerator is the temperature

Of freezing zone
Of cooling medium
At which refrigerant gas becomes liquid
Of evaporator

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