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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The bank of tubes at the back of domestic refrigerator is

Capillary tubes
Condenser tubes
Evaporator tubes
Refrigerant cooling tubes

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Refrigeration and Air Conditioning
A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be

All of these
Dirty condenser surface
Lack of cooling water
Water temperature being high

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Refrigeration and Air Conditioning
During heating and dehumidification process, dry bulb temperature

Decreases
Remains constant
Increases
None of these

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Refrigeration and Air Conditioning
A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called

Saturated air
Dry air
Moist air
Specific humidity

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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 - e₁e₂
1/e₁ + 1/e₂
e₁ + e₂

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Refrigeration and Air Conditioning
In aircraft, air refrigeration Cycle is used because of

Higher coefficient of performance
High heat transfer rate
Low weight per tonne of refrigeration
Low temperature at high altitudes

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MORE MCQ ON Refrigeration and Air Conditioning

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