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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The coefficient of performance of Heat Pump is always ___ one.

Equal to
Greater than
Less than
None of the listed here

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Refrigeration and Air Conditioning
At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant

depends on other factors
remains same
increases
decreases

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Refrigeration and Air Conditioning
The refrigerant for a refrigerator should have

High latent heat
High sensible heat
Low latent heat
High total heat

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Refrigeration and Air Conditioning
The boiling point of ________ is 10.5°C.

Ammonia
R-12
Carbon dioxide
Sulphur dioxide

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

Carnot cycle
Vapour absorption
Electrolux refrigerator
Vapour compression

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Refrigeration and Air Conditioning
A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of -23°C. The Carnot coefficient of performance of cycle will be

5
6
0.2
1.2

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