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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The specific humidity during humidification process

Decreases
Increases
None of these
Remains constant

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Refrigeration and Air Conditioning
A condenser of refrigeration system rejects heat at the rate of 120 kW, while its compressor consumes a power of 30 kW. The coefficient of performance of the system will be

43833
4
3
43834

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Refrigeration and Air Conditioning
One of the purposes of sub cooling the liquid refrigerant is to

Increase cooling effect
Ensure that only liquid and not the vapour enters the expansion (throttling) valve
Reduce compressor discharge temperature
Reduce compressor overheating

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Refrigeration and Air Conditioning
Carbon dioxide is

Odourless
Colourless
Non-flammable
All of the listed here

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Refrigeration and Air Conditioning
An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation from surface 1 to surface 2 is given by

e₁e₂
e₁ + e₂
(e₁ + e₂)/ e₁ + e₂ - e₁e₂
1/e₁ + 1/e₂

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Refrigeration and Air Conditioning
In a domestic refrigerator, a capillary tube controls the flow of refrigerant from the

Condenser to the evaporator
Expansion valve to the evaporator
Condenser to the expansion valve
Evaporator to the thermostat

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MORE MCQ ON Refrigeration and Air Conditioning

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